CN109241688B - A method, system and terminal equipment for determining aerodynamic resistance of stay cables - Google Patents
A method, system and terminal equipment for determining aerodynamic resistance of stay cables Download PDFInfo
- Publication number
- CN109241688B CN109241688B CN201811330893.0A CN201811330893A CN109241688B CN 109241688 B CN109241688 B CN 109241688B CN 201811330893 A CN201811330893 A CN 201811330893A CN 109241688 B CN109241688 B CN 109241688B
- Authority
- CN
- China
- Prior art keywords
- test
- reynolds number
- wind direction
- stay cable
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 300
- 238000005192 partition Methods 0.000 claims abstract description 131
- 230000007613 environmental effect Effects 0.000 claims abstract description 8
- 238000004590 computer program Methods 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000000638 solvent extraction Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 230000003902 lesion Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Architecture (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention is suitable for the technical field of bridge design, and discloses a method, a system and terminal equipment for determining the aerodynamic resistance of a stay cable, wherein the method comprises the following steps: acquiring size information and environmental information of the stay cable, wherein the environmental information comprises a wind direction angle; determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test; if the Reynolds number is in a subcritical region or a supercritical region, determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number; if the Reynolds number is in a critical zone, determining a fitting parameter value according to the partition of the wind direction angle, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number; and calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable. The method can simply, accurately and efficiently calculate the aerodynamic resistance of the stay cable with the surface damaged, and provides basis and reference for the related design of the stay cable of the cable-stayed bridge.
Description
Technical Field
The invention belongs to the technical field of bridge design, and particularly relates to a method and a system for determining pneumatic resistance of a stay cable and terminal equipment.
Background
The stay cable is used as an important stressed member of a cable-stayed bridge, the wind load design of the stay cable has important significance in the wind resistance design of the bridge, and the existing hot extrusion Polyethylene (PE) semi-parallel steel wire stay cable is the most commonly used stay cable form.
At present, the premise of calculating the aerodynamic resistance of the stay cable is that the surface of the stay cable is smooth, but the actual value and the theoretical value of the aerodynamic resistance of the stay cable are different to a certain extent due to the fact that the stay cable is possibly damaged in the processes of production, transportation and installation, and therefore the calculation result of the aerodynamic resistance of the stay cable is inaccurate due to the method.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, a system, and a terminal device for determining a pneumatic resistance of a stay cable, so as to solve a problem in the prior art that a calculation result of the pneumatic resistance of the stay cable is inaccurate.
The first aspect of the embodiment of the invention provides a method for determining the aerodynamic resistance of a stay cable, which comprises the following steps:
acquiring size information of the stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between the wind direction and a preset direction;
determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test;
if the Reynolds number is in a subcritical region or a supercritical region, determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number;
if the Reynolds number is in a critical zone, determining a fitting parameter value according to the partition of the wind direction angle, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number;
and calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable.
A second aspect of the embodiments of the present invention provides a system for determining aerodynamic resistance of a stay cable, including:
the acquisition module is used for acquiring size information of the stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction;
the Reynolds number determining module is used for determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test;
the first resistance coefficient determining module is used for determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number if the Reynolds number is in a subcritical zone or a supercritical zone;
the second resistance coefficient determining module is used for determining a fitting parameter value according to the partition of the wind direction angle if the Reynolds number is in a critical zone, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number;
and the aerodynamic resistance calculation module is used for calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for determining the aerodynamic resistance of a stay cable as described above when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium storing a computer program, which when executed by one or more processors implements the steps of the method for determining aerodynamic resistance of a stay cable as described above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the method comprises the steps of firstly, obtaining size information of a stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction; then determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test; calculating the resistance coefficient of the stay cable according to the subarea of the Reynolds number, namely determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number if the Reynolds number is in a subcritical area or a supercritical area; if the Reynolds number is in a critical zone, determining a fitting parameter value according to the partition of the wind direction angle, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the Reynolds number of the fitting parameter value; and finally, calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable. The embodiment of the invention can simply, accurately and efficiently calculate the aerodynamic resistance of the stay cable with the damaged surface, and provides basis and reference for the related design of the stay cable of the cable-stayed bridge.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating an implementation of a method for determining aerodynamic resistance of a stay cable according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wind direction angle provided by an embodiment of the present invention;
fig. 3 is a schematic flow chart illustrating an implementation of a method for determining aerodynamic resistance of a stay cable according to another embodiment of the present invention;
FIG. 4 is a cross-sectional view of a damaged cable stay according to an embodiment of the present invention;
fig. 5 is a schematic block diagram of a system for determining aerodynamic resistance of a stay cable according to an embodiment of the present invention;
fig. 6 is a schematic block diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a method for determining aerodynamic resistance of a stay cable according to an embodiment of the present invention, and only a part related to the embodiment of the present invention is shown for convenience of description. The execution main body of the embodiment of the invention can be terminal equipment. As shown in fig. 1, the method may include the steps of:
step S101: the method comprises the steps of obtaining size information of the stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction.
The main bearing part directly transmits the weight of the main girder and the bridge deck of the cable-stayed bridge to the tower frame. Generally, a smooth undamaged stay cable is cylindrical, but the stay cable has a high possibility of damaging the surface of the stay cable during production, transportation and installation, wherein the damage may be scratch damage, section damage or the like.
The dimension information of the stay cable may include information such as a cross-sectional diameter of the stay cable and a length of the stay cable. The environmental information of the stay cable can include wind direction angle, wind speed, air density and the like. The wind direction angle is an angle between the wind direction and a preset direction. As shown in fig. 2, the circle in the drawing is the cross section of the stay cable, the triangular notch is the stay cable surface flaw, θ is the wind direction angle, the wind direction angle of the incoming wind directly facing the stay cable surface flaw is 0 degree, and the wind direction of the incoming wind with the wind direction angle of 0 degree is the preset direction.
In the embodiment of the invention, the stay cable is a stay cable for which the aerodynamic resistance is to be calculated, and the aerodynamic resistance can also be called as air resistance.
Step S102: and determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test.
Where the reynolds number is a dimensionless number that can be used to characterize the flow of a fluid.
In the embodiment of the invention, the reynolds number of the stay cable can be calculated according to the size information and the environment information, and specifically, the reynolds number of the stay cable can be calculated according to the cross section diameter, the wind speed, the air density and the dynamic viscosity coefficient (or the motion viscosity coefficient) of the stay cable.
The partition of the Reynolds number comprises a subcritical region, a critical region and a supercritical region, the change rule of the resistance coefficient along with the Reynolds number can be obtained through a wind tunnel test, and the Reynolds number is partitioned according to the difference of the change rule of the resistance coefficient along with the Reynolds number. In the subcritical region, the resistance coefficient is basically unchanged along with the change of the Reynolds number; in the critical region, the drag coefficient decreases with increasing reynolds number; in the supercritical region, the drag coefficient does not substantially change with changes in the Reynolds number. The Reynolds number of the subcritical region is smaller than that of the critical region, and the Reynolds number of the supercritical region is larger than that of the critical region. The partition for determining the wind direction angle may be to determine which partition the wind direction angle belongs to according to a range of a test wind direction angle corresponding to a test wind direction angle partition obtained by a wind tunnel test. The division for determining the reynolds number may be to first determine which reynolds number range the reynolds number belongs to, and then determine the division of the reynolds number according to the division of the wind direction angle and the reynolds number range to which the reynolds number belongs.
Wind tunnel tests were conducted in the high speed section of the wind tunnel. The wind tunnel is a series double-test-section return/direct current boundary layer wind tunnel. The high-speed test section is 2.2 meters wide, 2 meters high and 5 meters long. The Reynolds number change is realized by adjusting the wind speed, the temperature, the humidity and the air pressure in the wind tunnel are recorded, and the Reynolds numbers, the resistance coefficients and other information corresponding to different wind speeds and stay cable sizes are calculated.
Step S103: and if the Reynolds number is in a subcritical region or a supercritical region, determining the resistance coefficient of the stay cable according to the wind direction angle partition and the Reynolds number partition.
In the embodiment of the invention, if the Reynolds number is in a subcritical region or a supercritical region, the wind tunnel test can obtain the distribution of the wind direction angle and the corresponding relationship between the subareas of the Reynolds number and the resistance coefficients of the stay cables, and the resistance coefficients of the stay cables corresponding to the subareas of the wind direction angle and the subareas of the Reynolds number can be determined according to the corresponding relationship.
Step S104: and if the Reynolds number is in a critical zone, determining a fitting parameter value according to the partition of the wind direction angle, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number.
In the embodiment of the invention, if the Reynolds number is in a critical zone, the corresponding relation between the wind direction angle partition and the fitting parameter value can be obtained through a wind tunnel test, the fitting parameter value corresponding to the wind direction angle partition of the stay cable can be determined according to the corresponding relation, and the resistance coefficient of the stay cable can be calculated according to the fitting parameter value and the Reynolds number by utilizing a quartic polynomial fitting formula.
Step S105: and calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable.
In the embodiment of the invention, the size information comprises the cross section diameter of the stay cable and the length of the stay cable, the environment information comprises the incoming wind speed and the air density, and the wind speed can be the average wind speed of the incoming wind.
The calculation of the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environmental information of the stay cable is specifically as follows: and calculating the aerodynamic resistance of the stay cable according to the resistance coefficient of the stay cable, the diameter of the cross section of the stay cable, the length of the stay cable, the incoming flow wind speed and the air density, wherein the specific calculation formula is formula (1). The aerodynamic resistance calculated according to equation (1) is the average aerodynamic resistance experienced by the stay cable.
In the formula (1), FDIs the aerodynamic resistance of the stay cable, rho is the air density, U is the incoming wind speed, D is the cross section diameter of the stay cable, L is the length of the stay cable, CDIs the resistance coefficient of the stay cable.
As can be seen from the above description, in the embodiment of the present invention, the wind tunnel test is used to determine the wind direction angle partition and the reynolds number partition, the resistance coefficient of the stay cable is determined by using different methods according to the reynolds number partitions, and the aerodynamic resistance of the stay cable is calculated according to the resistance coefficient of the stay cable, so that the problem of inaccurate calculation result of the aerodynamic resistance of the stay cable with surface damage in the prior art can be solved, the aerodynamic resistance of the stay cable with surface damage can be calculated simply, accurately and efficiently, and a basis and a reference are provided for the related design of the stay cable of the cable-stayed bridge.
Fig. 3 is a schematic flow chart illustrating an implementation of a method for determining aerodynamic resistance of a stay cable according to another embodiment of the present invention. As shown in fig. 3, on the basis of the above embodiment, the following steps may be further included before step S101:
step S301: and acquiring the corresponding relation between the test Reynolds number and the test resistance coefficient of the test stay cable model under different test wind direction angles, wherein the test stay cable model and the stay cable have the same surface damage type.
In the embodiment of the invention, the test stay cable model is a stay cable model for wind tunnel test, and the surface damage type of the test stay cable model is the same as that of the stay cable for which the aerodynamic resistance is to be calculated. The surface damage types are the same, and the shape, the depth and the like of the damage are the same, for example, scratch damage with equilateral triangle is adopted, and the damage depth is 1 mm.
And testing the stay cable model through a wind tunnel test. Specifically, the change of the test reynolds number can be realized by adjusting the test wind speed, the value of the test aerodynamic resistance on the test stay cable model can be directly measured by an instrument or a tool, and then the value of the test resistance coefficient can be obtained according to a relational formula (namely formula (1)) between the aerodynamic resistance and the resistance coefficient. Changing the test wind speed to change the value of the test Reynolds number under the same test wind direction angle, and obtaining a test resistance coefficient corresponding to the test Reynolds number, so as to obtain the corresponding relation between the test Reynolds number and the test resistance coefficient under the test wind direction angle; and then, by changing the test wind direction angle and repeating the process, the corresponding relation between the test Reynolds number and the test resistance coefficient under different test wind direction angles can be obtained.
In order to distinguish the stay cable parameters of the aerodynamic resistance to be calculated in the embodiment shown in fig. 1, a test word is added before the parameters in the wind tunnel test process, but the actual meanings are the same. For example, the wind direction angle in the wind tunnel test is referred to as a test wind direction angle; the Reynolds number in the wind tunnel test is called a test Reynolds number; the drag coefficient in the wind tunnel test is referred to as a test drag coefficient and the like.
In the embodiment of the invention, the wind tunnel test process is described by taking four surface damages as examples. The stay cables have a diameter of 120 mm. The first surface damage is scratch damage, and is in the shape of an equilateral triangle with a depth of 0.5 mm; the second surface damage is scratch damage, the shape is an equilateral triangle, and the depth is 1.0 mm; the third surface damage is scratch damage, is in the shape of an equilateral triangle and has the depth of 2.0 mm; the fourth surface lesion was a section lesion with a depth of 1.0 mm. The cross-section of these four surface lesions is shown in FIG. 4, (A) is the first surface lesion, (B) is the second surface lesion, (C) is the third surface lesion, (D) is the fourth surface lesion, and the numerical units in FIG. 4 are all millimeters.
Step S302: according to the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind direction angles, partitioning the test wind direction angles to obtain test wind direction angle partitions, partitioning the test Reynolds numbers to obtain test Reynolds number partitions, and obtaining the corresponding relation between the test wind direction angle partitions, the test Reynolds number partitions and the test Reynolds number range, wherein the test Reynolds number partitions comprise a subcritical partition, a critical partition and a supercritical partition.
In the embodiment of the invention, the curve of the test resistance coefficient changing along with the test Reynolds number under different test wind direction angles can be obtained according to the corresponding relation between the test Reynolds number and the test resistance coefficient under different test wind direction angles.
The rule for partitioning the test wind direction angle is as follows: and a test wind direction angle area in which the test resistance coefficient is close to the change curve of the test Reynolds number is determined as a test wind direction angle partition, and the test wind direction angles with larger differences with the change curves of other test wind direction angles are classified as an independent test wind direction angle partition.
The rules for partitioning the reynolds number of the experiment are: and dividing the partitions of the test Reynolds number according to the difference of the test resistance coefficient along with the change rule of the test Reynolds number. In a subcritical region, the test resistance coefficient is basically not changed along with the change of the test Reynolds number, namely the test resistance coefficient is basically not changed; in the critical region, the test resistance coefficient is reduced along with the increase of the test Reynolds number; in the supercritical region, the test drag coefficient is substantially unchanged with the change of the test Reynolds number, i.e., the test drag coefficient is substantially unchanged. Generally, the test reynolds number in the subcritical region is smaller than the test reynolds number in the critical region, and the test reynolds number in the critical region is smaller than the test reynolds number in the supercritical region.
The range of the test reynolds number in the sub-zone of the test reynolds number corresponding to the different test wind direction angle sub-zones is different. Exemplarily, the correspondence between the test wind direction angle partition, the test reynolds number partition and the test reynolds number range obtained by the four surface damages is shown in tables 1 to 4.
TABLE 1 correspondence between test wind direction angle partition, test Reynolds number partition and test Reynolds number range of first surface damage
TABLE 2 corresponding relationship between test wind direction angle partition, test Reynolds number partition and test Reynolds number range of the second surface damage
TABLE 3 correspondence between test wind direction angle partition, test Reynolds number partition and test Reynolds number range for the third surface damage
TABLE 4 correspondence between test wind direction angle partition, test Reynolds number partition and test Reynolds number range of the fourth surface damage
TABLE 5 corresponding relationship between test wind direction angle partition, test Reynolds number partition and test resistance coefficient of the first surface damage and the second surface damage
TABLE 6 corresponding relationship between test wind direction angle partition, test Reynolds number partition and test resistance coefficient of the third and fourth surface damages
Step S303: and if the test Reynolds number is in a subcritical zone or a supercritical zone, acquiring the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient.
Because the test resistance coefficient is basically kept unchanged in the subcritical region and the supercritical region, the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient can be obtained when the test Reynolds number is in the subcritical region or the supercritical region.
Illustratively, table 5 is the correspondence of the test wind direction angle divisions, the test reynolds number divisions, and the test resistance coefficients for the first surface damage and the second surface damage, and table 6 is the correspondence of the test wind direction angle divisions, the test reynolds number divisions, and the test resistance coefficients for the third surface damage and the fourth surface damage, where "/" indicates no data.
Step S304: and if the test Reynolds number is in the critical zone, performing quartic polynomial fitting calculation on the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind direction angles to obtain the corresponding relation between the test wind direction angle zones and the test fitting parameter values.
In the embodiment of the invention, if the test Reynolds number is in a critical zone, the MATLAB software is used for carrying out quartic polynomial fitting on the corresponding relation between the test Reynolds number and the test resistance coefficient under different test wind direction angles to obtain the corresponding relation between the test wind direction angle zones and the test fitting parameter values.
TABLE 7 correspondence between test wind direction angle partitions of first surface damage and test fitting parameter values
TABLE 8 correspondence between test wind direction angle partitions and test fitting parameter values for second surface damage
TABLE 9 correspondence between test wind direction angle divisions and test fitting parameter values for a third type of surface damage
Exemplarily, the correspondence between the test wind direction angle partitions of the four surface damages and the test fitting parameter values are shown in tables 7 to 10, respectively. The test fitting parameter values comprise a first parameter value a, a second parameter value b, a third parameter value c, a fourth parameter value d and a fifth parameter value e, and a, b, c, d and e are dimensionless parameters of a fourth-order polynomial fitting formula.
TABLE 10 corresponding relationship between test wind direction angle partitions and test fitting parameter values for the fourth surface damage
As another embodiment of the present invention, after step S304, the method further includes:
and if the test Reynolds number is in the critical zone, acquiring the corresponding relation among the test wind direction angle partition, the test Reynolds number, the maximum value of the test resistance coefficient and the minimum value of the test resistance coefficient, wherein the test wind direction angle partition is the range of the test wind direction angle.
The test wind direction angle partition is a range of test wind direction angles, and only one independent test wind direction angle partition is not included.
Illustratively, the correspondence relationships among the test wind direction angle divisions, the test reynolds numbers, the maximum values of the test resistance coefficients, and the minimum values of the test resistance coefficients of the four surface damages are shown in tables 11 to 14, respectively. Wherein, CD_upperFor the maximum value of the test resistance coefficient, CD_lowerIs the minimum value of the resistance coefficient of the test.
TABLE 11 first test wind Angle partition with multiple surface Damage, test Reynolds number, CD_upperAnd CD_lowerCorresponding relationship of
TABLE 12 second test wind Angle partition with multiple surface Damage, test Reynolds number, CD_upperAnd CD_lowerCorresponding relationship of
TABLE 13 third test wind Angle partition with much surface damage, test Reynolds number, CD_upperAnd CD_lowerCorresponding relationship of
After step S105, the method further includes:
and if the division of the Reynolds number is a critical area, determining the division of the wind direction angle, and determining the division of the wind direction angle and the maximum resistance coefficient and the minimum resistance coefficient of the stay cable corresponding to the Reynolds number according to the corresponding relation among the test wind direction angle division, the test Reynolds number, the maximum value of the test resistance coefficient and the minimum value of the test resistance coefficient.
And calculating the maximum aerodynamic resistance of the stay cable according to the maximum resistance coefficient of the stay cable, the size information and the environment information, and calculating the minimum aerodynamic resistance of the stay cable according to the minimum resistance coefficient of the stay cable, the size information and the environment information.
The calculation method of the maximum aerodynamic resistance and the minimum aerodynamic resistance is similar to that of step S105, and is not described again.
In the embodiment of the invention, the range of the aerodynamic resistance of the stay cable can be obtained according to the maximum aerodynamic resistance and the minimum aerodynamic resistance, and a basis and a reference are provided for the related design of the stay cable of the cable-stayed bridge.
TABLE 14 fourth test wind Angle partition with much surface damage, test Reynolds number, CD_upperAnd CD_lowerCorresponding relationship of
As another embodiment of the present invention, the size information includes a cross-sectional diameter of the stay cable, and the environmental information further includes an incoming flow wind speed, an air density, and a dynamic viscosity coefficient;
determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the partition of the wind direction angle and the partition of the Reynolds number based on a wind tunnel test, wherein the method comprises the following steps:
and determining the Reynolds number of the stay cable according to the diameter of the cross section, the incoming flow wind speed, the air density and the dynamic viscosity coefficient.
And determining the partition of the wind direction angle and the partition of the Reynolds number corresponding to the Reynolds number according to the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test Reynolds number range.
The calculation formula for determining the Reynolds number of the stay cable according to the diameter of the cross section, the incoming flow wind speed, the air density and the dynamic viscosity coefficient is as follows:
in the formula (2), Re is the reynolds number of the stay cable, μ is the dynamic viscosity coefficient, and v is the kinematic viscosity coefficient, where v is μ/ρ.
Based on the wind tunnel test, the partition for determining the wind direction angle may be to determine which partition the wind direction angle belongs to according to the range of the test wind direction angle corresponding to the test wind direction angle partition. According to the corresponding relation between the test wind direction angle subarea, the test Reynolds number subarea and the test Reynolds number range, the subarea for determining the wind direction angle and the subarea for determining the Reynolds number corresponding to the Reynolds number can be determined by firstly determining which Reynolds number range corresponding to the subarea for determining the wind direction angle the Reynolds number belongs to, and then determining the subarea for determining the Reynolds number according to the subarea for determining the wind direction angle and the Reynolds number range to which the Reynolds number belongs.
As another embodiment of the present invention, determining a drag coefficient of a stay cable according to a wind direction angle partition and a reynolds number partition includes:
and determining the resistance coefficients of the stay cables corresponding to the wind direction angle subareas and the Reynolds number subareas according to the corresponding relation between the test wind direction angle subareas and the test Reynolds number subareas and the test resistance coefficients.
As another embodiment of the present invention, determining the fitting parameter value according to the partition of the wind direction angle includes:
and determining the fitting parameter values corresponding to the partitions of the wind direction angle according to the corresponding relation between the test wind direction angle partitions and the test fitting parameter values.
As another embodiment of the present invention, the fitting parameter values include a first parameter value, a second parameter value, a third parameter value, a fourth parameter value, and a fifth parameter value;
the fourth-order polynomial fitting formula is as follows:
CD＝aRe4+bRe3+cRe2+dRe+e (3)
in the formula (3), CDThe resistance coefficient of the stay cable is shown, Re is the Reynolds number, a is the first parameter value, b is the second parameter value, c is the third parameter value, d is the fourth parameter value, and e is the fifth parameter value.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 5 is a schematic block diagram of a system for determining aerodynamic resistance of a stay cable according to an embodiment of the present invention, and only a part related to the embodiment of the present invention is shown for convenience of explanation.
In the embodiment of the present invention, the system 5 for determining the aerodynamic resistance of the stay cable includes:
the obtaining module 51 is configured to obtain size information of the stay cable and environment information where the stay cable is located, where the environment information includes a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction;
the Reynolds number determining module 52 is used for determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test;
the first resistance coefficient determining module 53 is configured to determine the resistance coefficient of the stay cable according to the wind direction angle partition and the reynolds number partition if the reynolds number is in the subcritical region or the supercritical region;
the second resistance coefficient determining module 54 is configured to determine a fitting parameter value according to the partition of the wind direction angle if the reynolds number is in the critical section, and calculate the resistance coefficient of the stay cable according to the fitting parameter value and the reynolds number by using a quadratic polynomial fitting formula;
and the aerodynamic resistance calculation module 55 is used for calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable.
Optionally, the system 5 for determining aerodynamic resistance of a stay cable further comprises:
the first corresponding relation acquisition module is used for acquiring the corresponding relation between the test Reynolds number and the test resistance coefficient of the test stay cable model under different test wind direction angles, wherein the test stay cable model and the stay cable have the same surface damage type;
the second corresponding relation acquisition module is used for partitioning the test wind direction angle to obtain a test wind direction angle partition according to the corresponding relation between the test Reynolds number and the test resistance coefficient under different test wind direction angles, partitioning the test Reynolds number to obtain a test Reynolds number partition, and obtaining the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test Reynolds number range, wherein the test Reynolds number partition comprises a subcritical area, a critical area and a supercritical area;
the third corresponding relation obtaining module is used for obtaining the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient if the test Reynolds number is in the subcritical region or the supercritical region;
and the fourth corresponding relation acquisition module is used for performing fourth-order polynomial fitting calculation on the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind angles to obtain the corresponding relation between the test wind angle partitions and the test fitting parameter values if the test Reynolds numbers are in the critical zone.
Optionally, the size information includes a cross-sectional diameter of the stay cable, and the environmental information further includes an incoming flow wind speed, an air density, and a dynamic viscosity coefficient;
the reynolds number determination module 52 includes:
the Reynolds number determining unit is used for determining the Reynolds number of the stay cable according to the diameter of the cross section, the incoming flow wind speed, the air density and the power viscosity coefficient;
and the Reynolds number partition determining unit is used for determining the partition of the wind direction angle based on the wind tunnel test, and determining the partition of the wind direction angle and the partition of the Reynolds number corresponding to the Reynolds number according to the corresponding relation of the test wind direction angle partition, the test Reynolds number partition and the test Reynolds number range.
Optionally, the first resistance coefficient determining module 53 further includes:
and the first resistance coefficient determining unit is used for determining the resistance coefficients of the stay cables corresponding to the wind direction angle subareas and the Reynolds number subareas according to the corresponding relation between the test wind direction angle subareas and the test Reynolds number subareas and the test resistance coefficients.
Optionally, the second resistance coefficient determining module 54 further comprises:
and the parameter value determining unit is used for determining the fitting parameter value corresponding to the wind direction angle partition according to the corresponding relation between the test wind direction angle partition and the test fitting parameter value.
Optionally, in the second resistance coefficient determination module 54, the fitting parameter values include a first parameter value, a second parameter value, a third parameter value, a fourth parameter value, and a fifth parameter value;
the fourth-order polynomial fitting formula is as follows:
CD＝aRe4+bRe3+cRe2+dRe+e (3)
in the formula (3), CDThe resistance coefficient of the stay cable is shown, Re is the Reynolds number, a is the first parameter value, b is the second parameter value, c is the third parameter value, d is the fourth parameter value, and e is the fifth parameter value.
It is clear to those skilled in the art that, for the convenience and simplicity of description, the above-mentioned division of the functional units and modules is only used as an example, in practical applications, the above-mentioned function distribution can be performed by different functional units and modules according to needs, that is, the internal structure of the system for determining the pneumatic resistance of the stay cable is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 6 is a schematic block diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the terminal device 6 of this embodiment includes: one or more processors 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processors 60. The processor 60, when executing the computer program 62, implements the steps in the above-described method for determining the aerodynamic resistance of the stay cables, for example, steps S101 to S105 shown in fig. 1. Alternatively, the processor 60, when executing the computer program 62, implements the functions of the modules/units in the above-described system for determining the aerodynamic drag of a stay cable, such as the modules 51 to 55 shown in fig. 5.
Illustratively, the computer program 62 may be partitioned into one or more modules/units that are stored in the memory 61 and executed by the processor 60 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 62 in the terminal device 6. For example, the computer program 62 may be divided into an acquisition module, a reynolds number determination module, a first resistance coefficient determination module, a second resistance coefficient determination module, and a pneumatic resistance calculation module, each of which functions specifically as follows:
the acquisition module is used for acquiring size information of the stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction;
the Reynolds number determining module is used for determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the subarea of the wind direction angle and the subarea of the Reynolds number based on a wind tunnel test;
the first resistance coefficient determining module is used for determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number if the Reynolds number is in a subcritical zone or a supercritical zone;
the second resistance coefficient determining module is used for determining a fitting parameter value according to the partition of the wind direction angle if the Reynolds number is in a critical zone, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number;
and the aerodynamic resistance calculation module is used for calculating the aerodynamic resistance of the stay cable according to the resistance coefficient, the size information and the environment information of the stay cable.
Other modules or units can refer to the description of the embodiment shown in fig. 5, and are not described again here.
The terminal device can be a desktop computer, a notebook, a palm computer, a cloud server and other computing devices. The terminal device 6 includes, but is not limited to, a processor 60 and a memory 61. It will be understood by those skilled in the art that fig. 6 is only one example of a terminal device and does not constitute a limitation of the terminal device 6, and may include more or less components than those shown, or combine some components, or different components, for example, the terminal device 6 may further include an input device, an output device, a network access device, a bus, etc.
The Processor 60 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 61 may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory 61 may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device. Further, the memory 61 may also include both an internal storage unit of the terminal device and an external storage device. The memory 61 is used for storing the computer program 62 and other programs and data required by the terminal device. The memory 61 may also be used to temporarily store data that has been output or is to be output.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the system and method for determining the aerodynamic resistance of the stay cable disclosed may be implemented in other ways. For example, the above-described embodiment of the system for determining aerodynamic drag of a stay cable is merely illustrative, and for example, the division of the modules or units is only a logical division, and the actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A method for determining the aerodynamic resistance of a stay cable is characterized by comprising the following steps:
acquiring size information of a stay cable and environment information of the stay cable, wherein the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction;
determining the Reynolds number of the stay cable according to the dimension information and the environment information, and determining the partition of the wind direction angle and the partition of the Reynolds number based on a wind tunnel test;
if the Reynolds number is in a subcritical region or a supercritical region, determining the resistance coefficient of the stay cable according to the partition of the wind direction angle and the partition of the Reynolds number;
if the Reynolds number is in a critical zone, determining a fitting parameter value according to the partition of the wind direction angle, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number;
calculating the aerodynamic resistance of the stay cable according to the resistance coefficient of the stay cable, the size information and the environment information;
the wind tunnel test-based method for determining the partition of the wind direction angle and the partition of the Reynolds number comprises the following steps:
and determining the subarea of the wind direction angle based on a wind tunnel test, and determining the subarea of the wind direction angle and the subarea of the Reynolds number corresponding to the Reynolds number according to the corresponding relation between the test wind direction angle subarea, the test Reynolds number subarea and the test Reynolds number range.
2. The method for determining the aerodynamic resistance of a stay cable according to claim 1, further comprising, before the obtaining of the dimensional information of the stay cable and the environmental information of the stay cable, the steps of:
obtaining the corresponding relation between the test Reynolds number and the test resistance coefficient of a test stay cable model under different test wind direction angles, wherein the test stay cable model and the stay cable have the same surface damage type;
according to the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind direction angles, partitioning the test wind direction angles to obtain test wind direction angle partitions, partitioning the test Reynolds numbers to obtain test Reynolds number partitions, and obtaining the corresponding relation between the test wind direction angle partitions, the test Reynolds number partitions and the test Reynolds number range, wherein the test Reynolds number partitions comprise a subcritical partition, a critical partition and a supercritical partition;
if the test Reynolds number is in a subcritical zone or a supercritical zone, acquiring the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient;
and if the test Reynolds number is in the critical zone, performing quartic polynomial fitting calculation on the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind direction angles to obtain the corresponding relation between the test wind direction angle zones and the test fitting parameter values.
3. The method for determining the aerodynamic resistance of the stay cable according to claim 2, wherein the size information comprises the cross-sectional diameter of the stay cable, and the environmental information further comprises an incoming wind speed, an air density and a dynamic viscosity coefficient;
the determining the Reynolds number of the stay cable according to the size information and the environment information includes:
and determining the Reynolds number of the stay cable according to the diameter of the cross section, the incoming flow wind speed, the air density and the dynamic viscosity coefficient.
4. The method for determining aerodynamic drag of a stay cable according to claim 2, wherein the determining a drag coefficient of the stay cable according to the section of the wind direction angle and the section of the reynolds number includes:
and determining the resistance coefficients of the stay cables corresponding to the wind direction angle partition and the Reynolds number partition according to the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient.
5. The method for determining the aerodynamic drag of a stay cable according to claim 2, wherein the determining the fitting parameter values according to the partitions of the wind direction angle comprises:
and determining the fitting parameter values corresponding to the partitions of the wind direction angle according to the corresponding relation between the test wind direction angle partitions and the test fitting parameter values.
6. A method for determining the aerodynamic resistance of a stay cable according to any one of claims 1 to 5, wherein the fitting parameter values comprise a first parameter value, a second parameter value, a third parameter value, a fourth parameter value and a fifth parameter value;
the fourth-order polynomial fitting formula is as follows:
CD＝aRe4+bRe3+cRe2+dRe+e,
wherein, CDAnd the resistance coefficient of the stay cable is represented, Re is the Reynolds number, a is the first parameter value, b is the second parameter value, c is the third parameter value, d is the fourth parameter value, and e is the fifth parameter value.
7. A system for determining aerodynamic drag of a stay cable, comprising:
the device comprises an acquisition module, a display module and a control module, wherein the acquisition module is used for acquiring size information of a stay cable and environment information of the stay cable, the environment information comprises a wind direction angle, and the wind direction angle is an angle between a wind direction and a preset direction;
the Reynolds number determining module is used for determining the Reynolds number of the stay cable according to the size information and the environment information, and determining the partition of the wind direction angle and the partition of the Reynolds number based on a wind tunnel test;
the first resistance coefficient determining module is used for determining the resistance coefficient of the stay cable according to the subarea of the wind direction angle and the subarea of the Reynolds number if the Reynolds number is in a subcritical zone or a supercritical zone;
the second resistance coefficient determining module is used for determining a fitting parameter value according to the distribution area of the wind direction angle if the Reynolds number is in a critical area, and calculating the resistance coefficient of the stay cable by utilizing a quartic polynomial fitting formula according to the fitting parameter value and the Reynolds number;
the aerodynamic resistance calculation module is used for calculating the aerodynamic resistance of the stay cable according to the resistance coefficient of the stay cable, the size information and the environment information;
the Reynolds number determination module comprises a Reynolds number subarea determination unit;
and the Reynolds number partition determining unit is used for determining the partition of the wind direction angle based on a wind tunnel test, and determining the partition of the wind direction angle and the partition of the Reynolds number corresponding to the Reynolds number according to the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test Reynolds number range.
8. The system for determining aerodynamic drag of a stay cable according to claim 7, further comprising:
the first corresponding relation acquisition module is used for acquiring the corresponding relation between the test Reynolds number and the test resistance coefficient of a test stay cable model under different test wind direction angles, wherein the test stay cable model and the stay cable have the same surface damage type;
the second corresponding relation acquisition module is used for partitioning the test wind direction angle to obtain a test wind direction angle partition according to the corresponding relation between the test Reynolds number and the test resistance coefficient under different test wind direction angles, partitioning the test Reynolds number to obtain a test Reynolds number partition, and obtaining the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test Reynolds number range, wherein the test Reynolds number partition comprises a subcritical area, a critical area and a supercritical area;
the third corresponding relation obtaining module is used for obtaining the corresponding relation between the test wind direction angle partition, the test Reynolds number partition and the test resistance coefficient if the test Reynolds number is in the subcritical region or the supercritical region;
and the fourth corresponding relation acquisition module is used for performing fourth-order polynomial fitting calculation on the corresponding relation between the test Reynolds numbers and the test resistance coefficients under different test wind angles to obtain the corresponding relation between the test wind angle partitions and the test fitting parameter values if the test Reynolds numbers are in the critical zone.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for determining the aerodynamic resistance of a stay cable according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by one or more processors, implements the steps of the method for determining the aerodynamic resistance of a stay cable according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330893.0A CN109241688B (en) | 2018-11-09 | 2018-11-09 | A method, system and terminal equipment for determining aerodynamic resistance of stay cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330893.0A CN109241688B (en) | 2018-11-09 | 2018-11-09 | A method, system and terminal equipment for determining aerodynamic resistance of stay cables |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109241688A CN109241688A (en) | 2019-01-18 |
| CN109241688B true CN109241688B (en) | 2021-08-03 |
Family
ID=65077724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811330893.0A Active CN109241688B (en) | 2018-11-09 | 2018-11-09 | A method, system and terminal equipment for determining aerodynamic resistance of stay cables |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109241688B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611417B (en) * | 2020-11-30 | 2023-01-10 | 国网河北省电力有限公司电力科学研究院 | Measuring method, device, equipment and storage medium of secondary air volume |
| CN116070333B (en) * | 2023-03-16 | 2023-06-06 | 石家庄铁道大学 | Analysis method, system and terminal of stay cable aerodynamic force considering Reynolds number effect |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106284075A (en) * | 2016-09-23 | 2017-01-04 | 石家庄铁道大学 | Bifilar helix hot extruded polyethylene half parallel steel wire suspension cable and parameter determination method thereof |
| CN207672430U (en) * | 2016-09-23 | 2018-07-31 | 石家庄铁道大学 | Half parallel steel wire suspension cable double helix structure of diameter 120mm hot extruded polyethylenes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3855065B2 (en) * | 2004-03-04 | 2006-12-06 | 独立行政法人 宇宙航空研究開発機構 | Load reducing device and model used for it |
| CN102967724A (en) * | 2012-12-12 | 2013-03-13 | 中南大学 | Method for measuring wind speed and wind direction |
| CN108170893A (en) * | 2017-12-04 | 2018-06-15 | 北京市市政工程研究院 | A kind of length of unstressed cable of cable-stayed bridge computational methods, device, terminal and storage medium |
-
2018
- 2018-11-09 CN CN201811330893.0A patent/CN109241688B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106284075A (en) * | 2016-09-23 | 2017-01-04 | 石家庄铁道大学 | Bifilar helix hot extruded polyethylene half parallel steel wire suspension cable and parameter determination method thereof |
| CN207672430U (en) * | 2016-09-23 | 2018-07-31 | 石家庄铁道大学 | Half parallel steel wire suspension cable double helix structure of diameter 120mm hot extruded polyethylenes |
Non-Patent Citations (3)
| Title |
|---|
| 斜拉索的阻力系数研究;王卫华 等;《空气动力学学报》;20050930;第23卷(第3期);第389-393页 * |
| 非标准圆形斜拉索气动性能试验研究;闫煦东 等;《万方数据库》;20160526;参见第533-537页摘要和第1-2节 * |
| 非标准圆截面斜拉索气动性能试验研究;樊利兵;《中国优秀硕士学位论文全文数据库电子期刊 工程科技II辑》;20160415;第2016年卷(第4期);第C034-434页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109241688A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105740611B (en) | The computational methods and system of a kind of cable waste | |
| CN109241688B (en) | A method, system and terminal equipment for determining aerodynamic resistance of stay cables | |
| CN108593260A (en) | Lightguide cable link fault location and detection method and terminal device | |
| US8423328B2 (en) | Method of distributing a random variable using statistically correct spatial interpolation continuously with spatially inhomogeneous statistical correlation versus distance, standard deviation, and mean | |
| CN105631936A (en) | Point cloud repair method and system | |
| CN113705118B (en) | A calculation method for wind turbine wake turbulence intensity | |
| CN112560355A (en) | Method and device for predicting Mach number of wind tunnel based on convolutional neural network | |
| CN110225453A (en) | Mobile terminal locating method, device, electronic equipment and storage medium | |
| CN109446703B (en) | A method, device and terminal equipment for determining aerodynamic resistance of stay cables | |
| CN104123119B (en) | Dynamic vision measurement feature point center quick positioning method based on GPU | |
| CN106446405B (en) | A kind of integrated circuit device neural net model establishing Method of Sample Selection and device | |
| CN109934151B (en) | Face detection method based on movidius computing chip and Yolo face | |
| CN112632862B (en) | Wind field stability determining method and device, electronic equipment and storage medium | |
| CN107561106A (en) | A kind of measuring method and device of streak shape morphology characterization parameter | |
| CN114061524B (en) | Steel coil contour measuring method and device | |
| CN110064668A (en) | The method and terminal device of oiler temperature control | |
| CN112816959B (en) | Clustering method, device, equipment and storage medium for vehicles | |
| CN109388912A (en) | A kind of determination method, system and the terminal device of suspension cable aerodynamic drag | |
| CN107423509B (en) | A method and device for constructing aeroelastic model of transmission line tower system | |
| CN114547781B (en) | Marine mast performance evaluation method and system based on virtual reality | |
| CN111080632A (en) | Wheel set tread polygon monitoring method and device and terminal equipment | |
| CN118313665A (en) | Power transmission line icing risk assessment method and device, electronic equipment and medium | |
| CN117113483A (en) | Bridge damage detection method, device, terminal and storage medium based on support angle | |
| CN117310393B (en) | Cable local defect detection method, device and storage medium | |
| CN111199345A (en) | Measurement method and terminal equipment of designed rainfall in sponge city |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |