CN109241688A - A kind of determination method, system and the terminal device of suspension cable aerodynamic drag - Google Patents
A kind of determination method, system and the terminal device of suspension cable aerodynamic drag Download PDFInfo
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Abstract
The present invention is suitable for bridge design technology field, discloses determination method, system and the terminal device of a kind of suspension cable aerodynamic drag, comprising: obtain the dimension information and environmental information of suspension cable, environmental information includes wind angle；The Reynolds number of suspension cable is determined according to dimension information and environmental information, is based on wind tunnel test, is determined the subregion of wind angle and the subregion of Reynolds number；If Reynolds number is in close-to-critical range or supercritical region, the resistance coefficient of suspension cable is determined according to the subregion of the subregion of wind angle and Reynolds number；If Reynolds number is in critical zone, fit parameter values are determined according to the subregion of wind angle, according to fit parameter values and Reynolds number, the resistance coefficient of suspension cable is calculated using quartic polynomial fitting formula；The aerodynamic drag of suspension cable is calculated according to the resistance coefficient, dimension information and environmental information of suspension cable.The present invention can simple, accurate and efficient gauging surface damage suspension cable aerodynamic drag, provide foundation and reference for the relevant design of stay cable of cable-stayed bridge.
Description
Technical field
The invention belongs to bridge design technology field more particularly to a kind of determination method, the systems of suspension cable aerodynamic drag
And terminal device.
Background technique
Important primary structure member of the suspension cable as cable-stayed bridge, wind load design have important meaning in Wind-resistance of Bridges design
Justice, half parallel steel wire suspension cable of hot extruded polyethylene (polyethylene, PE) is most common suspension cable form at present.
Currently, calculating to suspension cable aerodynamic drag is on condition that the surface of suspension cable is smooth, but since suspension cable is in life
It produces, be possible to be damaged in transport and installation process, aerodynamic drag actual value and theoretical value on suspension cable is caused to have centainly
Difference, therefore, this method will cause the calculated result inaccuracy of suspension cable aerodynamic drag.
Summary of the invention
In view of this, the embodiment of the invention provides determination method, system and the terminals of a kind of suspension cable aerodynamic drag to set
It is standby, to solve the problems, such as the calculated result inaccuracy of suspension cable aerodynamic drag in the prior art.
The first aspect of the embodiment of the present invention provides a kind of determination method of suspension cable aerodynamic drag, comprising:
Environmental information locating for the dimension information and suspension cable of suspension cable is obtained, wherein environmental information includes wind angle, wind
To angle of the angle between wind direction and preset direction；
The Reynolds number of suspension cable is determined according to dimension information and environmental information, and is based on wind tunnel test, determines wind angle
The subregion of subregion and Reynolds number；
If Reynolds number is in close-to-critical range or supercritical region, determined according to the subregion of the subregion of wind angle and Reynolds number oblique
The resistance coefficient of drag-line；
If Reynolds number is in critical zone, fit parameter values are determined according to the subregion of wind angle, and according to fit parameter values
And Reynolds number calculates the resistance coefficient of suspension cable using quartic polynomial fitting formula；
The aerodynamic drag of suspension cable is calculated according to the resistance coefficient, dimension information and environmental information of suspension cable.
The second aspect of the embodiment of the present invention provides a kind of determination system of suspension cable aerodynamic drag, comprising:
Obtain module, for obtaining environmental information locating for the dimension information and suspension cable of suspension cable, wherein environmental information
Including wind angle, angle of the wind angle between wind direction and preset direction；
Reynolds number determining module for determining the Reynolds number of suspension cable according to dimension information and environmental information, and is based on wind
Hole test, determines the subregion of wind angle and the subregion of Reynolds number；
Resistance coefficient 1 determining module, if close-to-critical range or supercritical region are in for Reynolds number, according to wind angle
Subregion and the subregion of Reynolds number determine the resistance coefficient of suspension cable；
Second resistance coefficient determining module determines quasi- if being in critical zone for Reynolds number according to the subregion of wind angle
Parameter value is closed, and calculates the resistance system of suspension cable using quartic polynomial fitting formula according to fit parameter values and Reynolds number
Number；
Aerodynamic drag computing module, for calculating oblique pull according to the resistance coefficient, dimension information and environmental information of suspension cable
The aerodynamic drag of rope.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in
In memory and the computer program that can run on a processor, processor realize oblique pull as described above when executing computer program
The step of determination method of rope aerodynamic drag.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, computer readable storage medium
It is stored with computer program, suspension cable aerodynamic drag as described above is realized when computer program is executed by one or more processors
Determination method the step of.
Existing beneficial effect is the embodiment of the present invention compared with prior art: the embodiment of the present invention obtains suspension cable first
Dimension information and suspension cable locating for environmental information, environmental information includes wind angle, wind angle be wind direction and preset direction it
Between angle；Then the Reynolds number of suspension cable is determined according to dimension information and environmental information, and is based on wind tunnel test, determines wind direction
The subregion at angle and the subregion of Reynolds number；The resistance coefficient that suspension cable is calculated then according to the subregion of Reynolds number, even at Reynolds number
In close-to-critical range or supercritical region, then the resistance coefficient of suspension cable is determined according to the subregion of the subregion of wind angle and Reynolds number；If
Reynolds number is in critical zone, then determines fit parameter values according to the subregion of wind angle, and according to fit parameter values Reynolds number, utilizes
Quartic polynomial fitting formula calculates the resistance coefficient of suspension cable；Finally according to the resistance coefficient of suspension cable, dimension information and ring
The aerodynamic drag of border information calculating suspension cable.The embodiment of the present invention can simple, accurate and efficient gauging surface damage suspension cable
Aerodynamic drag, provide foundation and reference for the relevant design of stay cable of cable-stayed bridge.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation process schematic diagram of the determination method for the suspension cable aerodynamic drag that one embodiment of the invention provides；
Fig. 2 is the schematic diagram for the wind angle that one embodiment of the invention provides；
Fig. 3 be another embodiment of the present invention provides suspension cable aerodynamic drag determination method implementation process schematic diagram；
Fig. 4 is the schematic diagram of the section of the suspension cable for the surface damage that one embodiment of the invention provides；
Fig. 5 is the schematic block diagram of the determination system for the suspension cable aerodynamic drag that one embodiment of the invention provides；
Fig. 6 is the schematic block diagram for the terminal device that one embodiment of the invention provides.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, so as to provide a thorough understanding of the present application embodiment.However, it will be clear to one skilled in the art that there is no these specific
The application also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, so as not to obscure the description of the present application with unnecessary details.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Fig. 1 is the implementation process schematic diagram of the determination method for the suspension cable aerodynamic drag that one embodiment of the invention provides, and is
Convenient for explanation, only parts related to embodiments of the present invention are shown.The executing subject of the embodiment of the present invention can be terminal
Equipment.As shown in Figure 1, this method may comprise steps of:
Step S101: obtaining environmental information locating for the dimension information and suspension cable of suspension cable, and environmental information includes wind direction
Angle, angle of the wind angle between wind direction and preset direction.
Wherein, suspension cable is main supporting part cable-stayed bridge main-beam and bridge floor weight being directly delivered on pylon.One
As, the smooth suspension cable not damaged is cylinder, and still, suspension cable is very possible in production, transport and installation process
Suspension cable surface is set to be damaged, wherein damage can be scratch damage or section damage etc..
The dimension information of suspension cable may include the information such as the cross-sectional diameter of suspension cable and the length of suspension cable.Suspension cable
Locating environmental information may include the information such as wind angle, wind speed and atmospheric density.Wherein, wind angle is wind direction and preset direction
Between angle.As shown in Fig. 2, circle in figure is the cross section of suspension cable, at suspension cable surface damage at triangular cut,
θ is wind angle, will face the wind angle of the incoming flow wind at suspension cable surface damage as 0 degree, the incoming flow for being 0 degree by wind angle
The wind direction of wind is as preset direction.
In embodiments of the present invention, suspension cable is the suspension cable of aerodynamic drag to be calculated, and aerodynamic drag is referred to as sky
Atmidometer.
Step S102: the Reynolds number of suspension cable is determined according to dimension information and environmental information, and is based on wind tunnel test, is determined
The subregion of wind angle and the subregion of Reynolds number.
Wherein, Reynolds number is a kind of dimensionless number that can be used to characterize fluid mobility status.
In embodiments of the present invention, the Reynolds number of suspension cable can be calculated according to dimension information and environmental information, specifically,
It can be calculated according to the cross-sectional diameter of suspension cable, wind speed, atmospheric density and power viscosity coefficient (or coefficientof kinematic viscosity) oblique
The Reynolds number of drag-line.
The subregion of Reynolds number includes close-to-critical range, critical zone and supercritical region, by wind tunnel test, available resistance system
Number carries out subregion to Reynolds number with the difference of Reynolds number changing rule by resistance coefficient with the changing rule of Reynolds number.?
Close-to-critical range, resistance coefficient do not change substantially with the variation of Reynolds number；In critical zone, resistance coefficient with Reynolds number increase
And reduce；In supercritical region, resistance coefficient does not also change substantially with the variation of Reynolds number.The Reynolds number of close-to-critical range is less than and faces
The Reynolds number of battery limit (BL), the Reynolds number of supercritical region are greater than the Reynolds number of critical zone.Determine that the subregion of wind angle can be according to wind
The range of the corresponding test wind angle of the test wind angle subregion that hole is tested determines which subregion the wind angle belongs to.
It determines the subregion of Reynolds number to can be first and determines Reynolds number belongs to which corresponding reynolds number range of subregion of the wind angle,
Then the subregion of Reynolds number is determined according to the reynolds number range that the subregion of wind angle and Reynolds number belong to.
Wind tunnel test is carried out in the high regime of wind-tunnel.The wind-tunnel is that the double test sections of a series connection go back to/direct current boundary layers
Wind-tunnel.Its high-speed test (HST) section is 2.2 meters wide, 2 meters high, 5 meters long.The variation of Reynolds number is realized by adjusting wind speed, while recording wind
Temperature, humidity and air pressure in hole calculate different wind speed and the information such as the corresponding Reynolds number of suspension cable size and resistance coefficient.
Step S103: if Reynolds number is in close-to-critical range or supercritical region, according to the subregion of wind angle and Reynolds number
Subregion determines the resistance coefficient of suspension cable.
In embodiments of the present invention, it if Reynolds number is in close-to-critical range or supercritical region, can be obtained by wind tunnel test
Corresponding relationship between the distribution of wind angle, the subregion of Reynolds number and the resistance coefficient of suspension cable, can according to the corresponding relationship
To determine the resistance coefficient of the corresponding suspension cable of subregion of the subregion and Reynolds number of wind angle.
Step S104: if Reynolds number is in critical zone, fit parameter values are determined according to the subregion of wind angle, and according to quasi-
It closes parameter value and Reynolds number and calculates the resistance coefficient of suspension cable using quartic polynomial fitting formula.
In embodiments of the present invention, if Reynolds number is in critical zone, pass through point of the available wind angle of wind tunnel test
The corresponding relationship in area and fit parameter values can determine that the subregion of the wind angle of suspension cable is corresponding quasi- according to the corresponding relationship
Parameter value is closed, the resistance of suspension cable can be calculated using quartic polynomial fitting formula according to the fit parameter values and Reynolds number
Coefficient.
Step S105: the aerodynamic drag of suspension cable is calculated according to the resistance coefficient, dimension information and environmental information of suspension cable.
In embodiments of the present invention, dimension information includes the cross-sectional diameter of suspension cable and the length of suspension cable, environment letter
Breath includes arrives stream wind speed and atmospheric density, and wind speed can be the mean wind speed of incoming flow wind.
The aerodynamic drag of suspension cable is calculated according to the resistance coefficient, dimension information and environmental information of suspension cable specifically: root
Oblique pull is calculated according to the resistance coefficient of suspension cable, the cross-sectional diameter of suspension cable, the length of suspension cable, arrives stream wind speed and atmospheric density
The aerodynamic drag of rope, specific formula for calculation are formula (1).The aerodynamic drag calculated according to formula (1) is the average air that suspension cable is subject to
Dynamic resistance.
In formula (1), FDFor the aerodynamic drag of suspension cable, ρ is atmospheric density, and U is arrives stream wind speed, and D is the transversal of suspension cable
Face diameter, L are the length of suspension cable, CDFor the resistance coefficient of suspension cable.
Seen from the above description, the embodiment of the present invention determines the subregion of wind angle and point of Reynolds number by wind tunnel test
Area determines the resistance coefficient of suspension cable according to the different subregions of Reynolds number using different methods, and according to the resistance of suspension cable
Coefficient calculates the aerodynamic drag of suspension cable, is able to solve the calculating knot of the aerodynamic drag to surface damage suspension cable in the prior art
The problem of fruit inaccuracy, can simple, accurate and efficient gauging surface damage suspension cable aerodynamic drag, be cable-stayed bridge oblique pull
The relevant design of rope provides foundation and reference.
Fig. 3 be another embodiment of the present invention provides suspension cable aerodynamic drag determination method implementation process schematic diagram.
As shown in figure 3, on the basis of the above embodiments, before step S101 can with the following steps are included:
Step S301: test Reynolds number and test resistance system of the test suspension cable model under different tests wind angle are obtained
Several corresponding relationship, wherein test suspension cable model is identical as the surface damage type of suspension cable.
In embodiments of the present invention, test suspension cable model is the suspension cable model for carrying out wind tunnel test, tests suspension cable
Model is identical as the surface damage type of the suspension cable of aerodynamic drag to be calculated.Wherein, it is finger injury that surface damage type is identical
Shape and depth etc. it is all identical, such as be all the scratch damage of equilateral triangle, and lesion depths are 1 millimeter.
Test suspension cable model is tested by wind tunnel test.Specifically, it may be implemented by adjusting the test wind
The variation of Reynolds number is tested, the test aerodynamic drag on test suspension cable model can be directly measured by instrument or tool
Value, then according to the value of the available test resistance coefficient of relation formula (i.e. formula (1)) of aerodynamic drag and resistance coefficient.Pass through
Under same test wind angle, change the test wind to change the value of test Reynolds number, and obtains corresponding with test Reynolds number
Resistance coefficient is tested, available under the test wind angle, test Reynolds number and the corresponding relationship for testing resistance coefficient；Then
Wind angle is tested by changing, repeats the above process, the test Reynolds number under available different tests wind angle and test
The corresponding relationship of resistance coefficient.
In order to be distinguished with the suspension cable parameter of the aerodynamic drag to be calculated in embodiment illustrated in fig. 1, in wind tunnel test
All add " test " two word before parameter in the process, but its practical significance or identical.For example, the wind direction in wind tunnel test
Angle is known as testing wind angle；Reynolds number in wind tunnel test is known as testing Reynolds number；Resistance coefficient in wind tunnel test is known as trying
Test resistance coefficient etc..
In embodiments of the present invention, wind tunnel test process is illustrated by taking four kinds of surface damages as an example.Suspension cable it is straight
Diameter is 120 millimeters.The first surface damage is scratch damage, and shape is equilateral triangle, and depth is 0.5 millimeter；Second of table
Surface damage is scratch damage, and shape is equilateral triangle, and depth is 1.0 millimeters；The third surface damage is scratch damage, shape
For equilateral triangle, depth is 2.0 millimeters；4th kind of surface damage is section damage, and depth is 1.0 millimeters.These four surfaces
The section of damage is as shown in figure 4, (A) is the first surface damage, and (B) is second of surface damage, and (C) is the third surface damage
Wound, (D) are the 4th kind of surface damage, and the numerical value unit in Fig. 4 is millimeter.
Step S302: right according to the corresponding relationship of test Reynolds number and test resistance coefficient under different tests wind angle
Test wind angle carries out subregion and obtains test wind angle subregion, carries out subregion to test Reynolds number and obtains test Reynolds number subregion,
And test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing reynolds number range are obtained, test Reynolds number subregion
Including close-to-critical range, critical zone and supercritical region.
In embodiments of the present invention, corresponding with test resistance coefficient according to the test Reynolds number under different tests wind angle
The curve that test resistance coefficient under the available different tests wind angle of relationship changes with test Reynolds number.
The rule for carrying out subregion to test wind angle is: test resistance coefficient is close with the change curve of test Reynolds number
Test wind direction angular zone is set to a test wind angle subregion, all biggish with the change curve difference under other test wind angles
Test wind angle is classified as an individually test wind angle subregion.
To test Reynolds number carry out subregion rule be: according to test resistance coefficient with test Reynolds number changing rule not
The same subregion to divide test Reynolds number.In close-to-critical range, tests resistance coefficient and do not become substantially with the variation of test Reynolds number
Change, i.e. test resistance coefficient is basically unchanged；In critical zone, tests resistance coefficient and reduce with the increase of test Reynolds number；Super
Critical zone, test resistance coefficient do not change substantially with the variation of test Reynolds number, i.e. test resistance coefficient is basically unchanged.It is logical
Often, the test Reynolds number in close-to-critical range is less than the test Reynolds number of critical zone, and the test Reynolds number of critical zone is less than overcritical
The test Reynolds number in area.
The range of test Reynolds number in the subregion of the corresponding test Reynolds number of different test wind angle subregions is different
's.Illustratively, test wind angle subregion, test Reynolds number subregion and the test Reynolds that above-mentioned four kinds of surface damages respectively obtain
The corresponding relationship of number range is as shown in table 1 to table 4.
Test wind angle subregion, test Reynolds number subregion and pair for testing reynolds number range of 1 the first surface damage of table
It should be related to
The test wind angle subregion, test Reynolds number subregion and pair for testing reynolds number range of second of the surface damage of table 2
It should be related to
Test wind angle subregion, test Reynolds number subregion and pair for testing reynolds number range of 3 the third surface damage of table
It should be related to
The test wind angle subregion, test Reynolds number subregion and pair for testing reynolds number range of the 4th kind of surface damage of table 4
It should be related to
The test wind angle subregion of the first surface damage of table 5 and second of surface damage, test Reynolds number subregion and examination
Test the corresponding relationship of resistance coefficient
The test wind angle subregion of the third surface damage of table 6 and the 4th kind of surface damage, test Reynolds number subregion and examination
Test the corresponding relationship of resistance coefficient
Step S303: if test Reynolds number is in close-to-critical range or supercritical region, test wind angle subregion, test are obtained
The corresponding relationship of Reynolds number subregion and test resistance coefficient.
Due to testing resistance coefficient and being held essentially constant in close-to-critical range and supercritical region, so, at test Reynolds number
When close-to-critical range or supercritical region, available test wind angle subregion, test Reynolds number subregion and test resistance coefficient
Corresponding relationship.
Illustratively, table 5 is the test wind angle subregion of the first surface damage and second of surface damage, test Reynolds
Number subregion and the corresponding relationship for testing resistance coefficient, table 6 are the test wind direction of the third surface damage and the 4th kind of surface damage
Angle subregion, test Reynolds number subregion and the corresponding relationship for testing resistance coefficient, wherein "/" indicates the data being not present.
Step S304: it if test Reynolds number is in critical zone, to the test Reynolds number under different tests wind angle and tries
The corresponding relationship for testing resistance coefficient carries out quartic polynomial the Fitting Calculation, obtains test wind angle subregion and tests fit parameter values
Corresponding relationship.
In embodiments of the present invention, if test Reynolds number is in critical zone, by MATLAB software to different tests wind
The corresponding relationship of test Reynolds number and test resistance coefficient under to angle carries out quartic polynomial fitting, obtains test wind angle point
The corresponding relationship in area and test fit parameter values.
The test wind angle subregion of 7 the first surface damage of table and the corresponding relationship for testing fit parameter values
The test wind angle subregion of second of the surface damage of table 8 and the corresponding relationship for testing fit parameter values
The test wind angle subregion of 9 the third surface damage of table and the corresponding relationship for testing fit parameter values
Illustratively, the corresponding relationship point of the test wind angle subregion of above-mentioned four kinds of surface damages and test fit parameter values
Not as shown in table 7 to table 10.Wherein, test fit parameter values include the first parameter value a, the second parameter value b, third parameter value c,
4th parameter value d and the 5th parameter value e, a, b, c, d, e are the dimensionless group of quartic polynomial fitting formula.
The test wind angle subregion of the 4th kind of surface damage of table 10 and the corresponding relationship for testing fit parameter values
As further embodiment of this invention, after step S304, further includes:
If test Reynolds number is in critical zone, test wind angle subregion, test Reynolds number, test resistance coefficient are obtained most
The corresponding relationship of big value and test resistance coefficient minimum value, the test wind angle subregion are test wind direction angular region.
Wherein, which is the range for testing wind angle, does not include only one individually test wind direction
The subregion at angle.
Illustratively, the test wind angle subregion of above-mentioned four kinds of surface damages, test Reynolds number, test resistance coefficient are maximum
The corresponding relationship of value and test resistance coefficient minimum value is respectively as shown in table 11 to table 14.Wherein, CD_upperTo test resistance system
Number maximum value, CD_lowerTo test resistance coefficient minimum value.
Test wind angle subregion, test Reynolds number, C more than the first surface damage of table 11D_upperAnd CD_lowerCorresponding close
System
Test wind angle subregion, test Reynolds number, C more than second of the surface damage of table 12D_upperAnd CD_lowerCorresponding close
System
Test wind angle subregion, test Reynolds number, C more than the third surface damage of table 13D_upperAnd CD_lowerCorresponding close
System
After step S105, further includes:
If the subregion of the Reynolds number be critical zone, it is determined that the subregion of the wind angle, according to test wind angle subregion,
Reynolds number, test resistance coefficient maximum value and the corresponding relationship for testing resistance coefficient minimum value are tested, determines the wind angle
The maximum resistance coefficient and minimum drag coefficient of subregion and the corresponding suspension cable of the Reynolds number.
The suspension cable is calculated according to the maximum resistance coefficient, the dimension information and the environmental information of the suspension cable
Maximum aerodynamic drag, according to the minimum drag coefficient of the suspension cable, the dimension information and the environmental information calculate institute
State the minimum aerodynamic drag of suspension cable.
Wherein, the calculation method of maximum aerodynamic drag and minimum aerodynamic drag is similar with step S105, repeats no more.
In embodiments of the present invention, the pneumatic resistance of suspension cable can be obtained according to maximum aerodynamic drag and minimum aerodynamic drag
The range of power provides foundation and reference for the relevant design of stay cable of cable-stayed bridge.
Test wind angle subregion, test Reynolds number, C more than the 4th kind of surface damage of table 14D_upperAnd CD_lowerCorresponding close
System
As further embodiment of this invention, dimension information includes the cross-sectional diameter of suspension cable, and environmental information further includes coming
Flow wind speed, atmospheric density and power viscosity coefficient；
The Reynolds number of suspension cable is determined according to dimension information and environmental information, and is based on wind tunnel test, determines wind angle
The subregion of subregion and Reynolds number, comprising:
The Reynolds number of suspension cable is determined according to cross-sectional diameter, arrives stream wind speed, atmospheric density and power viscosity coefficient.
Based on wind tunnel test, the subregion of wind angle is determined, and according to test wind angle subregion, test Reynolds number subregion and examination
The corresponding relationship for testing reynolds number range determines the subregion of the subregion of wind angle and the corresponding Reynolds number of Reynolds number.
Wherein, the Reynolds number of suspension cable is determined according to cross-sectional diameter, arrives stream wind speed, atmospheric density and power viscosity coefficient
Calculation formula are as follows:
In formula (2), Re is the Reynolds number of suspension cable, and μ is power viscosity coefficient, and v is coefficientof kinematic viscosity, wherein v=μ/
ρ。
Based on wind tunnel test, determine that the subregion of wind angle can be according to the corresponding test wind angle of test wind angle subregion
Range determine which subregion the wind angle belongs to.According to test wind angle subregion, test Reynolds number subregion and test thunder
The corresponding relationship of promise number range determines that the subregion of the subregion of wind angle and the corresponding Reynolds number of Reynolds number can be thunder determining first
Promise number belongs to which corresponding reynolds number range of subregion of the wind angle, is then belonged to according to the subregion of wind angle and Reynolds number
Reynolds number range determine the subregion of Reynolds number.
As further embodiment of this invention, the resistance system of suspension cable is determined according to the subregion of the subregion of wind angle and Reynolds number
Number, comprising:
According to test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing resistance coefficient, wind angle is determined
Subregion and Reynolds number the corresponding suspension cable of subregion resistance coefficient.
As further embodiment of this invention, fit parameter values are determined according to the subregion of wind angle, comprising:
According to the corresponding relationship of test wind angle subregion and test fit parameter values, determine that the subregion of wind angle is corresponding quasi-
Close parameter value.
As further embodiment of this invention, fit parameter values include the first parameter value, the second parameter value, third parameter value,
4th parameter value and the 5th parameter value；
Quartic polynomial fitting formula are as follows:
CD=aRe4+bRe3+cRe2+dRe+e (3)
In formula (3), CDFor the resistance coefficient of suspension cable, Re is Reynolds number, and a is the first parameter value, and b is the second parameter value, c
For third parameter value, d is the 4th parameter value, and e is the 5th parameter value.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Fig. 5 is the schematic block diagram of the determination system for the suspension cable aerodynamic drag that one embodiment of the invention provides, for the ease of
Illustrate, part related to the embodiment of the present invention is only shown.
In embodiments of the present invention, the determination system 5 of suspension cable aerodynamic drag includes:
Module 51 is obtained, for obtaining environmental information locating for the dimension information and suspension cable of suspension cable, wherein environment is believed
Breath includes wind angle, angle of the wind angle between wind direction and preset direction；
Reynolds number determining module 52 for determining the Reynolds number of suspension cable according to dimension information and environmental information, and is based on
Wind tunnel test determines the subregion of wind angle and the subregion of Reynolds number；
Resistance coefficient 1 determining module 53, if close-to-critical range or supercritical region are in for Reynolds number, according to wind direction
The subregion at angle and the subregion of Reynolds number determine the resistance coefficient of suspension cable；
Second resistance coefficient determining module 54 determines if being in critical zone for Reynolds number according to the subregion of wind angle
Fit parameter values, and the resistance system of suspension cable is calculated using quartic polynomial fitting formula according to fit parameter values and Reynolds number
Number；
Aerodynamic drag computing module 55 is oblique for being calculated according to the resistance coefficient, dimension information and environmental information of suspension cable
The aerodynamic drag of drag-line.
Optionally, the determination system 5 of suspension cable aerodynamic drag further include:
First corresponding relationship obtains module, for obtaining test thunder of the test suspension cable model under different tests wind angle
The corresponding relationship of promise number and test resistance coefficient, wherein test suspension cable model is identical as the surface damage type of suspension cable；
Second corresponding relationship obtain module, for according under different tests wind angle test Reynolds number and test resistance system
Several corresponding relationships carries out subregion to test wind angle and obtains test wind angle subregion, carries out subregion to test Reynolds number and obtain
Reynolds number subregion is tested, and obtains test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing reynolds number range,
Testing Reynolds number subregion includes close-to-critical range, critical zone and supercritical region；
Third corresponding relationship obtains module, if being in close-to-critical range or supercritical region for testing Reynolds number, obtains examination
Test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing resistance coefficient；
4th corresponding relationship obtains module, if critical zone is in for testing Reynolds number, under different tests wind angle
Test Reynolds number and test resistance coefficient corresponding relationship carry out quartic polynomial the Fitting Calculation, obtain test wind angle subregion
With the corresponding relationship of test fit parameter values.
Optionally, dimension information includes the cross-sectional diameter of suspension cable, and environmental information further includes arrives stream wind speed, atmospheric density
With power viscosity coefficient；
Reynolds number determining module 52 includes:
Reynolds number determination unit, for being determined according to cross-sectional diameter, arrives stream wind speed, atmospheric density and power viscosity coefficient
The Reynolds number of suspension cable；
Reynolds number subregion determination unit determines the subregion of wind angle, and according to test wind angle for being based on wind tunnel test
Subregion, test Reynolds number subregion and the corresponding relationship for testing reynolds number range, determine that the subregion of wind angle and Reynolds number are corresponding
The subregion of Reynolds number.
Optionally, resistance coefficient 1 determining module 53 further include:
Resistance coefficient 1 determination unit, for according to test wind angle subregion, test Reynolds number subregion and test resistance
The corresponding relationship of coefficient, the resistance coefficient of the corresponding suspension cable of the subregion of the subregion and Reynolds number that determine wind angle.
Optionally, the second resistance coefficient determining module 54 further include:
Parameter value-determining unit is determined for the corresponding relationship according to test wind angle subregion and test fit parameter values
The corresponding fit parameter values of the subregion of wind angle.
Optionally, in the second resistance coefficient determining module 54, fit parameter values include the first parameter value, the second parameter
Value, third parameter value, the 4th parameter value and the 5th parameter value；
Quartic polynomial fitting formula are as follows:
CD=aRe4+bRe3+cRe2+dRe+e (3)
In formula (3), CDFor the resistance coefficient of suspension cable, Re is Reynolds number, and a is the first parameter value, and b is the second parameter value, c
For third parameter value, d is the 4th parameter value, and e is the 5th parameter value.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of the determination system of the suspension cable aerodynamic drag are divided into different functions
Unit or module, to complete all or part of the functions described above.Each functional unit in embodiment, module can integrate
In one processing unit, it is also possible to each unit to physically exist alone, can also be integrated in two or more units
In one unit, above-mentioned integrated unit both can take the form of hardware realization, can also use the shape of SFU software functional unit
Formula is realized.In addition, the specific name of each functional unit, module is also only for convenience of distinguishing each other, it is not limited to this Shen
Protection scope please.The specific work process of unit in above-mentioned apparatus, module, can be with reference to the correspondence in preceding method embodiment
Process, details are not described herein.
Fig. 6 is the schematic block diagram for the terminal device that one embodiment of the invention provides.As shown in fig. 6, the terminal of the embodiment
Equipment 6 includes: one or more processors 60, memory 61 and is stored in the memory 61 and can be in the processor
The computer program 62 run on 60.The processor 60 realizes above-mentioned each suspension cable gas when executing the computer program 62
Step in the determination embodiment of the method for dynamic resistance, such as step S101 to S105 shown in FIG. 1.Alternatively, the processor 60
The function of each module/unit in the determination system embodiment of above-mentioned suspension cable aerodynamic drag is realized when executing the computer program 62
Can, such as the function of module 51 to 55 shown in Fig. 5.
Illustratively, the computer program 62 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 61, and are executed by the processor 60, to complete the application.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 62 in the terminal device 6 is described.For example, the computer program 62 can be divided
It is cut into and obtains module, Reynolds number determining module, resistance coefficient 1 determining module, the second resistance coefficient determining module and pneumatic resistance
Power computing module, each module concrete function are as follows:
Obtain module, for obtaining environmental information locating for the dimension information and suspension cable of suspension cable, wherein environmental information
Including wind angle, angle of the wind angle between wind direction and preset direction；
Reynolds number determining module for determining the Reynolds number of suspension cable according to dimension information and environmental information, and is based on wind
Hole test, determines the subregion of wind angle and the subregion of Reynolds number；
Resistance coefficient 1 determining module, if close-to-critical range or supercritical region are in for Reynolds number, according to wind angle
Subregion and the subregion of Reynolds number determine the resistance coefficient of suspension cable；
Second resistance coefficient determining module determines quasi- if being in critical zone for Reynolds number according to the subregion of wind angle
Parameter value is closed, and calculates the resistance system of suspension cable using quartic polynomial fitting formula according to fit parameter values and Reynolds number
Number；
Aerodynamic drag computing module, for calculating oblique pull according to the resistance coefficient, dimension information and environmental information of suspension cable
The aerodynamic drag of rope.
Other modules or unit can refer to the description in embodiment shown in fig. 5, and details are not described herein.
The terminal device can be desktop PC, notebook, palm PC and cloud server etc. and calculate equipment.
The terminal device 6 includes but are not limited to processor 60, memory 61.It will be understood by those skilled in the art that Fig. 6 is only
One example of terminal device, does not constitute the restriction to terminal device 6, may include components more more or fewer than diagram,
Perhaps combine certain components or different components, for example, the terminal device 6 can also include input equipment, output equipment,
Network access equipment, bus etc..
The processor 60 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 61 can be the internal storage unit of the terminal device, such as the hard disk or interior of terminal device
It deposits.What the memory 61 was also possible to be equipped on the External memory equipment of the terminal device, such as the terminal device inserts
Connect formula hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash memory
Block (Flash Card) etc..Further, the memory 61 can also both include the internal storage unit of terminal device or wrap
Include External memory equipment.The memory 61 is for storing needed for the computer program 62 and the terminal device other
Program and data.The memory 61 can be also used for temporarily storing the data that has exported or will export.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
Scope of the present application.
In embodiment provided herein, it should be understood that the determination system of disclosed suspension cable aerodynamic drag
And method, it may be implemented in other ways.For example, the determination system embodiment of suspension cable aerodynamic drag described above
It is only schematical, for example, the division of the module or unit, only a kind of logical function partition, in actual implementation may be used
To there is an other division mode, such as multiple units or components can be combined or can be integrated into another system or some
Feature can be ignored, or not execute.Another point, shown or discussed mutual coupling or direct-coupling or communication connection
It can be through some interfaces, the INDIRECT COUPLING or communication connection of device or unit, can be electrical property, mechanical or other shapes
Formula.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the application realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium do not include be electric carrier signal and
Telecommunication signal.
Embodiment described above is only to illustrate the technical solution of the application, rather than its limitations；Although referring to aforementioned reality
Example is applied the application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution should all
Comprising within the scope of protection of this application.
Claims (10)
1. a kind of determination method of suspension cable aerodynamic drag characterized by comprising
Environmental information locating for the dimension information and the suspension cable of suspension cable is obtained, wherein the environmental information includes wind direction
Angle, angle of the wind angle between wind direction and preset direction；
The Reynolds number of the suspension cable is determined according to the dimension information and the environmental information, and is based on wind tunnel test, is determined
The subregion of the subregion of the wind angle and the Reynolds number；
If the Reynolds number is in close-to-critical range or supercritical region, according to point of the subregion of the wind angle and the Reynolds number
Area determines the resistance coefficient of the suspension cable；
If the Reynolds number is in critical zone, fit parameter values are determined according to the subregion of the wind angle, and according to described quasi-
It closes parameter value and the Reynolds number and calculates the resistance coefficient of the suspension cable using quartic polynomial fitting formula；
The pneumatic resistance of the suspension cable is calculated according to the resistance coefficient of the suspension cable, the dimension information and the environmental information
Power.
2. the determination method of suspension cable aerodynamic drag according to claim 1, which is characterized in that in the acquisition suspension cable
Dimension information and the suspension cable locating for before environmental information, further includes:
The corresponding relationship of test Reynolds number and test resistance coefficient of the test suspension cable model under different tests wind angle is obtained,
Wherein the test suspension cable model is identical as the surface damage type of the suspension cable；
According to the corresponding relationship of test Reynolds number and test resistance coefficient under the different tests wind angle, to test wind angle
It carries out subregion and obtains test wind angle subregion, subregion is carried out to test Reynolds number and obtains test Reynolds number subregion, and is tested
Wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing reynolds number range, the test Reynolds number subregion include Asia
Critical zone, critical zone and supercritical region；
If test Reynolds number be in close-to-critical range or supercritical region, obtain test wind angle subregion, test Reynolds number subregion and
Test the corresponding relationship of resistance coefficient；
If test Reynolds number is in critical zone, to the test Reynolds number and test resistance coefficient under the different tests wind angle
Corresponding relationship carry out quartic polynomial the Fitting Calculation, obtain test wind angle subregion with test fit parameter values it is corresponding close
System.
3. the determination method of suspension cable aerodynamic drag according to claim 2, which is characterized in that the dimension information includes
The cross-sectional diameter of the suspension cable, the environmental information further include arrives stream wind speed, atmospheric density and power viscosity coefficient；
The Reynolds number that the suspension cable is determined according to the dimension information and the environmental information, and it is based on wind tunnel test,
Determine that the wind angle determines the subregion of the Reynolds number, comprising:
It is determined according to the cross-sectional diameter, the arrives stream wind speed, the atmospheric density and the power viscosity coefficient described oblique
The Reynolds number of drag-line；
Based on wind tunnel test, the subregion of the wind angle is determined, and according to the test wind angle subregion, test Reynolds number subregion
With the corresponding relationship of test reynolds number range, the subregion of the wind angle and the corresponding Reynolds number of the Reynolds number are determined
Subregion.
4. the determination method of suspension cable aerodynamic drag according to claim 2, which is characterized in that described according to the wind direction
The subregion of the subregion at angle and the Reynolds number determines the resistance coefficient of the suspension cable, comprising:
According to the test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing resistance coefficient, the wind is determined
To the resistance coefficient of the subregion at angle and the corresponding suspension cable of the subregion of the Reynolds number.
5. the determination method of suspension cable aerodynamic drag according to claim 2, which is characterized in that described according to the wind direction
The subregion at angle determines fit parameter values, comprising:
According to the corresponding relationship of the test wind angle subregion and test fit parameter values, determine that the subregion of the wind angle is corresponding
The fit parameter values.
6. the determination method of suspension cable aerodynamic drag according to any one of claims 1 to 5, which is characterized in that described quasi-
Closing parameter value includes the first parameter value, the second parameter value, third parameter value, the 4th parameter value and the 5th parameter value；
The quartic polynomial fitting formula are as follows:
CD=aRe4+bRe3+cRe2+ dRe+e,
Wherein, CDFor the resistance coefficient of the suspension cable, Re is the Reynolds number, and a is first parameter value, and b is described second
Parameter value, c are the third parameter value, and d is the 4th parameter value, and e is the 5th parameter value.
7. a kind of determination system of suspension cable aerodynamic drag characterized by comprising
Module is obtained, for obtaining environmental information locating for the dimension information and the suspension cable of suspension cable, wherein the environment
Information includes wind angle, angle of the wind angle between wind direction and preset direction；
Reynolds number determining module, for determining the Reynolds number of the suspension cable according to the dimension information and the environmental information,
And it is based on wind tunnel test, determine the subregion of the wind angle and the subregion of the Reynolds number；
Resistance coefficient 1 determining module, if close-to-critical range or supercritical region are in for the Reynolds number, according to the wind
The subregion of subregion and the Reynolds number to angle determines the resistance coefficient of the suspension cable；
Second resistance coefficient determining module, if critical zone is in for the Reynolds number, according to the distributed area of the wind angle
Domain determines fit parameter values, and is calculated according to the fit parameter values and the Reynolds number using quartic polynomial fitting formula
The resistance coefficient of the suspension cable；
Aerodynamic drag computing module, for the resistance coefficient, the dimension information and the environmental information according to the suspension cable
Calculate the aerodynamic drag of the suspension cable.
8. the determination system of suspension cable aerodynamic drag according to claim 7, which is characterized in that further include:
First corresponding relationship obtains module, for obtaining test Reynolds number of the test suspension cable model under different tests wind angle
With test resistance coefficient corresponding relationship, wherein it is described test suspension cable model and the suspension cable surface damage type phase
Together；
Second corresponding relationship obtain module, for according under the different tests wind angle test Reynolds number and test resistance system
Several corresponding relationships carries out subregion to test wind angle and obtains test wind angle subregion, carries out subregion to test Reynolds number and obtain
Reynolds number subregion is tested, and obtains test wind angle subregion, test Reynolds number subregion and the corresponding relationship for testing reynolds number range,
The test Reynolds number subregion includes close-to-critical range, critical zone and supercritical region；
Third corresponding relationship obtains module, if being in close-to-critical range or supercritical region for testing Reynolds number, obtains test wind
To angle subregion, test Reynolds number subregion and the corresponding relationship for testing resistance coefficient；
4th corresponding relationship obtains module, if critical zone is in for testing Reynolds number, under the different tests wind angle
Test Reynolds number and test resistance coefficient corresponding relationship carry out quartic polynomial the Fitting Calculation, obtain test wind angle subregion
With the corresponding relationship of test fit parameter values.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 6 when executing the computer program
The step of determination method of any one suspension cable aerodynamic drag.
10. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey
Sequence realizes the suspension cable gas as described in any one of claim 1 to 6 when the computer program is executed by one or more processors
The step of determination method of dynamic resistance.
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| CN201811330893.0A CN109241688B (en) | 2018-11-09 | 2018-11-09 | A method, system and terminal equipment for determining aerodynamic resistance of stay cables |
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