CN111609987B - Vibration table test system for vibration reduction basic building model with adjustable water pressure - Google Patents
Vibration table test system for vibration reduction basic building model with adjustable water pressure Download PDFInfo
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- CN111609987B CN111609987B CN202010519111.9A CN202010519111A CN111609987B CN 111609987 B CN111609987 B CN 111609987B CN 202010519111 A CN202010519111 A CN 202010519111A CN 111609987 B CN111609987 B CN 111609987B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 216
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- 238000013016 damping Methods 0.000 claims description 72
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- 239000011521 glass Substances 0.000 claims description 9
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- 230000002829 reductive effect Effects 0.000 description 14
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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Abstract
The application relates to the technical field of building structure vibration reduction research, and provides a vibration table test system of a vibration reduction basic building model with adjustable water pressure, which comprises the following components: a vibration table; the pressure container is pressed on the vibrating table, a flexible pipe is arranged on the pressure container, the flexible pipe is communicated with the inside of the pressure container, and the height of the flexible pipe relative to the pressure container can be adjusted; the vibration reduction foundation is arranged in the pressure container; the building model is provided with a building base, and the building base is connected with the vibration reduction foundation; wherein, building model and pressure vessel swing joint, the shaking table is suitable for driving building model relative pressure vessel reciprocating motion. According to the technical scheme, the liquid level in the flexible pipe can be adjusted only by adjusting the height of the flexible pipe, so that the water pressure born by the vibration reduction foundation buried in water can be adjusted, vibration reduction effect change caused by quaternary water pressure change can be conveniently simulated, and the influence of different water pressure changes on the vibration reduction effect of the vibration reduction foundation can be analyzed.
Description
Technical Field
The invention relates to the technical field of building structure vibration reduction research, in particular to a vibration table test system of a vibration reduction basic building model with adjustable water pressure.
Background
At present, the vibration reduction foundation treatment of the building becomes an important way for treating the exceeding of the vibration of the surrounding buildings of the rail transit, and as the vibration isolation pad of the building substrate cannot be replaced, the design of the vibration isolation pad needs to be considered and the same service life of the building, but the adverse environmental factors such as acid-base salt solution erosion, temperature change, humidity change, water pressure change and the like of the vibration isolation pad of the building substrate all provide great challenges for the durability of the vibration isolation pad. Some projects are shallow in underground water level or deep in embedding depth of the foundation raft, the foundation bottom surface is often below the underground water level, the elastic cushion layer can face the influence of underground water pressure, and seasonal underground water level changes can enable the cushion layer to face water pressure alternation, so that experiments of vibration reduction effects of the elastic cushion layer under different underground water pressures need to be carried out on the test model.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the vibration table testing system for the vibration damping foundation building model with adjustable water pressure, which can adjust the liquid level height in the flexible pipe only by adjusting the height of the flexible pipe, thereby realizing the adjustment of the water pressure born by the vibration damping foundation buried in water, further conveniently simulating the vibration damping effect change caused by the quaternary water pressure change, and analyzing the influence of different water pressure changes on the vibration damping effect of the vibration damping foundation.
The invention provides a vibration table test system of a vibration reduction basic building model with adjustable water pressure, which comprises the following components: a vibration table; the pressure vessel is pressed on the vibrating table, a flexible pipe is arranged on the pressure vessel, the flexible pipe is communicated with the inside of the pressure vessel, and the height of the flexible pipe relative to the pressure vessel can be adjusted; the vibration reduction foundation is arranged in the pressure container; the building model is provided with a building base, and the building base is connected with the vibration reduction foundation; wherein, the building model is movably connected with the pressure vessel, and the vibrating table is suitable for driving the building model to reciprocate relative to the pressure vessel.
The invention provides a vibration table test system of a vibration damping foundation building model with adjustable water pressure, which comprises a vibration table, a pressure container, a vibration damping foundation and a building model. The flexible pipe is arranged on the pressure container and is communicated with the pressure container, the height of the flexible pipe relative to the pressure container is adjustable, the pressure container is arranged on a workbench of the vibrating table, a liquid medium is arranged in the pressure container, the liquid level of the liquid medium in the flexible pipe can be adjusted according to the height of the flexible pipe, a vibration reduction foundation is arranged in the pressure container, a building base of the building model is connected with the vibration reduction foundation (such as a surface connection or a multi-point support connection), the vibration reduction foundation can play a vibration reduction role on the building model, the building base and the vibration reduction foundation are arranged in the pressure container, and the building model is movably connected with the pressure container, so that when the vibrating table is started, the building model can move relative to the pressure container, the height of the liquid level in the flexible pipe can be adjusted, the liquid level is different, the water pressure in the pressure container is different, and accordingly the vibration effect change of the vibration reduction foundation under different water pressures can be simulated. Meanwhile, as the mechanical compressor is not required to be adopted to increase the water pressure, the pressure vessel can be relatively reduced, the length of the flexible pipe can be extended and lifted according to actual needs, the production cost of products is reduced, and the influence of the additional weight of the experimental device on the load of the vibrating table is reduced.
Specifically, according to pascal's principle, the hydrostatic pressure P of the vibration damping foundation buried in water is: p=ρg (h+h). Wherein ρ is the density of the liquid in the pressure vessel, g is the gravitational acceleration, H is the height of the liquid level in the pressure vessel, H is the height between the liquid level of the liquid in the flexible pipe and the liquid level of the liquid in the pressure vessel, and the pressure intensity of the vibration reduction foundation in the pressure vessel is changed by changing the liquid level of the flexible pipe. The liquid in the pressure container and the flexible pipe can be pure water or acid-base salt solution so as to simulate the influence of water pressure or acid-base salt corrosion coupling effect on the vibration damping effect of the vibration damping base, and if the acid-base salt solution is selected, the corrosiveness of the pressure container needs to be verified so as to ensure that the pressure container cannot be corroded by the acid-base salt solution. Because the flexible pipe is easy to install, if the water pressure is required to be high in the experiment, and the vertical space in the laboratory is enough, the flexible pipe can be lifted indoors, and can be lifted along the wall or the column of the laboratory to increase h; if the vertical space in the laboratory is not sufficient, the flexible tube can be pulled out of the room and then lifted up along the outside walls of the laboratory to increase h.
Further, if the building base is not immersed in water, the bottom area of the building base is a, the compressive stress of the building base is σ, the mass of the building model above the building base is M, and the weight M to be added thereto should be:
Wherein g is gravitational acceleration.
If the building substrate of the building model is soaked by water and the static water pressure of the building substrate buried in the water is P, the weight M to be added at the moment is as follows:
Wherein, building basement still water pressure P is:
P＝ρg(H+h)
the weight M should thus be:
Thus, M and h can be reasonably adjusted to balance the above equation. I.e. sigma is the compressive stress value that the damping basis should reach, A and m are the bottom surface area and mass of the model, respectively, and m 0 is the equivalent counterweight mass due to the increased base pressure. If the load capacity of the vibrating table is enough, a certain H and H can be set, and then a single compressive stress value is simply kept by adjusting M; if the carrying capacity of the vibrating table instrument is limited and an experiment cannot be carried out by increasing M, the equivalent counterweight can be increased by increasing H, and the mass calculation formula of the equivalent counterweight is M 0 =ρ (H+h) A.
In addition, even though the load capacity of the vibrating table is enough, the design substrate compressive stress needs to be changed in the experimental process, and the balance weight M is inconvenient to replace, so that the experimental effect can be achieved by a method of adjusting the equivalent balance weight mass M 0 by increasing or decreasing h.
According to one embodiment of the invention, the pressure container comprises a first water tank and a second water tank communicated with the first water tank, wherein the first water tank is arranged in an extending mode along the height direction, and the second water tank is arranged on one side of the bottom of the first water tank and extends along the horizontal direction in a direction away from the first water tank; the flexible pipe is arranged at the top of the first water tank and is communicated with the first water tank, and at least part of the building model is arranged in the second water tank and is movably connected with the second water tank.
The pressure container comprises a first water tank and a second water tank, the first water tank is arranged in an extending mode along the height direction, the second water tank is arranged on one side of the bottom of the first water tank and is communicated with the first water tank, the second water tank extends along the horizontal direction, and meanwhile the building model is convenient to be assembled and connected with the second water tank; the flexible pipe is arranged at the top of the first water tank and is communicated with the first water tank, the building substrate and the vibration reduction foundation are arranged in the second water tank, the liquid level of the liquid medium in the pressure container is convenient to adjust, and further the influence on the vibration reduction effect of the vibration reduction foundation under different water pressures is convenient to analyze.
Specifically, the first water tank and the second water tank can be integrally formed or connected in an adhesive mode, but the adhesive position is required to be sealed, so that the tightness of the pressure container is ensured. Meanwhile, in order to lighten the weight of the pressure container on the table surface of the vibrating table, the shape of the pressure container can be changed or the size of the water tank can be reduced, namely, the second water tank can be designed into a corresponding cube structure according to the building structure, the first water tank can be designed into a square, rectangular or round shape with a small chassis, and the additional volume and the additional weight of the water tank and the internal liquid can be reduced and lightened to the greatest extent by reducing the height and the size of the first water tank.
According to one embodiment of the invention, the building model further comprises a building body, wherein the building body comprises building floors and building upright posts fixedly connected with the building floors, the building base is arranged at the bottom of each building floor, and the building upright posts are arranged between two adjacent building floors and extend in the vertical direction; wherein, building stand with second water tank swing joint.
The building model includes building body and building basement, the building body includes building floor and the building stand with building floor fixed connection, wherein, building floor is cube sheet structure, quantity is a plurality of, the building stand sets up between two adjacent building floors, and extend along vertical direction and set up, and building stand and second water tank swing joint, the building stand can be under the vibration influence of shaking table relative second water tank reciprocating motion (if along the direction of height or along the horizontal direction motion), the building stand drives building floor motion, building floor's bottom is equipped with the building foundation, the building foundation is because with the vibration damping foundation connection, thereby can analyze the influence of the vibration damping effect of the vibration damping foundation that sets up building model's bottom under the different water pressures.
According to one embodiment of the invention, the second tank comprises a top plate defining a movable slot, the building column being provided with a piston rod arranged in the movable slot and adapted to reciprocate relative to the movable slot.
The second water tank is provided with a top plate, a movable groove is defined on the top plate, a piston rod matched with the movable groove is arranged on the building upright post, and the piston rod is inserted into the movable groove and moves relative to the extending direction of the movable groove so as to drive the building floor slab to move relative to the second water tank.
According to one embodiment of the invention, the movable groove is arranged to extend in the horizontal direction; or the movable groove extends along the vertical direction.
The arrangement direction of the movable groove is not limited, and the movable groove can be arranged along the horizontal direction or the vertical direction so as to analyze the influence on the vibration damping effect of the vibration damping foundation when vibrating under different water pressures and along different directions.
According to another embodiment of the present invention, the vibration table test system for a vibration damping basic building model with adjustable water pressure further comprises: and the sealing piece is arranged on the outer periphery of the piston rod and matched with the movable groove so as to seal a gap between the building upright post and the top plate.
Through setting up sealing member (like sealing piston or sealing sleeve) at the periphery circle of piston rod, then when the piston rod moves relative movable groove, the sealing member can take place elastic deformation to play sealed effect, prevent the liquid in the pressure vessel from flowing out from the clearance between building stand and the roof, stability and the security when having improved the product test. Of course, the sealing canvas can be arranged in the gap between the building upright post and the top plate to play a sealing role, and the sealing canvas has certain strength and is not easy to deform under certain water pressure.
According to one embodiment of the invention, the first water tank is cylindrical; the second water tank is cube-shaped; the diameter of the first water tank is in the range of 10 cm-20 cm; the height of the first water tank is in the range of 20 cm-30 cm; the top of the first water tank is provided with a water injection pipe corresponding to the pipe diameter of the flexible pipe, and the flexible pipe is communicated with the water injection pipe.
The first water tank is the cylinder type, and the second water tank is the cube type, and cylinder type structure and cube structure are all more regular, and the machine-shaping of being convenient for is suitable for batch production, and helps improving the pleasing to the eye degree of product.
The diameter of the first water tank is in the range of 10 cm-20 cm, and the height of the first water tank is in the range of 20 cm-30 cm, so that the liquid level of the pressure container is conveniently controlled, the volume and the weight of a product are reduced, and the influence of the additional weight of the pressure container on the vibrating table is reduced.
Through set up in the water injection pipe that the flexible pipe is linked together at the top of first water tank, the water injection pipe corresponds with the pipe diameter of flexible pipe to sealing connection, and help improving the reliability of connection.
According to one embodiment of the invention, the wall surface of the first water tank, which is arranged in the extending way along the height direction, is provided with scale marks; and/or the top of the first water tank is provided with an exhaust hole, and the exhaust hole is provided with a sealing plug.
The scale marks are arranged on the wall surface of the first water tank, which is arranged in the extending mode along the height direction, so that the pressure value can be determined through the liquid level height corresponding to the scale marks.
Through set up the exhaust hole (the top of first water tank is higher than the top of second water tank) at the top of first water tank, set up the sealing plug on the exhaust hole, when then to the water injection in the pressure vessel, open the exhaust hole, can be fast with the gaseous discharge in the pressure vessel to help improving water injection efficiency. After water injection is completed, the sealing plug is plugged on the exhaust hole, so that the sealing of the pressure container is realized, and water flow is prevented from flowing out of the exhaust hole.
According to another embodiment of the present invention, the vibration table test system for a vibration damping basic building model with adjustable water pressure further comprises: the support frame is used for fixing the flexible pipe, and scale marks are arranged on the support frame.
The vibration table testing system of the vibration damping foundation building model with adjustable water pressure further comprises a supporting frame, one end of the supporting frame is used for being fixed with the ground, the other end of the supporting frame is used for supporting the flexible pipe to fix the position of the flexible pipe, and scale marks are arranged on the supporting frame, so that the height of the liquid level in the flexible pipe can be rapidly determined according to the scale marks, and the pressure value of water in the pressure container can be rapidly determined conveniently.
In some embodiments, the vibration damping foundation comprises an elastic cushion or a laminated rubber mount; and/or the flexible pipe is a rubber pipe; and/or the pressure vessel is a glass vessel.
The vibration damping foundation comprises an elastic cushion layer or a laminated rubber support, one end face of the elastic cushion layer is arranged on the inner bottom plate of the pressure container, and the other end face corresponding to the elastic cushion layer is connected with the surface of the building base, so that the building base is suspended, and the vibration damping effect is achieved. The number of the laminated rubber supports is multiple, one end of each laminated rubber support is arranged on the inner bottom plate of the pressure container, and the other end of each laminated rubber support is supported with a building foundation point, so that the building foundation is suspended, and the vibration reduction effect is achieved.
The flexible pipe is a rubber pipe, and the rubber pipe has flexibility, is convenient for fix and is convenient for adjust its relative pressure vessel's height.
The pressure vessel is the glass vessel, is convenient for observe the inside operating mode of pressure vessel, and the processing technology of glass vessel is comparatively ripe, helps reducing the manufacturing cost of product, and glass vessel has certain intensity simultaneously, is convenient for assemble fixedly with building model.
According to the test system for the vibration table of the vibration damping foundation building model with the adjustable water pressure, provided by the invention, the liquid level height in the flexible pipe can be adjusted only by adjusting the height of the flexible pipe, so that the water pressure born by the vibration damping foundation buried in water can be adjusted, further the vibration damping effect change caused by the quaternary water pressure change can be conveniently tested, and the influence of different water pressure changes on the vibration damping effect of the vibration damping foundation can be analyzed.
Drawings
FIG. 1 is a schematic cross-sectional view of a hydraulic pressure adjustable vibration table test system for a vibration damping foundation building model according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a vibration table test system for a hydraulic pressure adjustable vibration damping foundation building model according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a test system of a vibration table of a vibration damping foundation model with adjustable water pressure according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a partial sectional structure of a vibration table test system for a vibration damping foundation building model with adjustable water pressure according to another embodiment of the present invention.
Reference numerals illustrate:
1. The test system of the vibration table of the vibration reduction basic building model with adjustable water pressure; 10. a vibration table; 20. a pressure vessel; 201. a first water tank; 2011. a water injection pipe; 2012. an exhaust hole; 202. a second water tank; 2021. a top plate; 2022. a movable groove; 30. building a model; 301. building floor slabs; 302. building upright posts; 3021. a piston rod; 40. a vibration damping foundation; 50. a flexible tube; 60. and (5) supporting frames.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which would be apparent to one of ordinary skill in the art without making any inventive effort are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
As shown in fig. 1, the present invention provides a vibration-damping foundation building model vibration table test system 1 with adjustable water pressure, comprising: a vibrating table 10; the pressure vessel 20 is pressed on the vibrating table 10, the pressure vessel 20 is provided with a flexible pipe 50, the flexible pipe 50 is communicated with the inside of the pressure vessel 20, and the height of the flexible pipe 50 relative to the pressure vessel 20 can be adjusted; a vibration damping base 40 provided in the pressure vessel 20; a building model 30, the building model 30 being provided with a building base (not shown in the figure) connected to the vibration damping base 40; wherein the building model 30 is movably connected with the pressure vessel 20, and the vibrating table 10 is suitable for driving the building model 30 to reciprocate relative to the pressure vessel 20.
The invention provides a vibration table test system 1 of a vibration damping foundation building model with adjustable water pressure, which comprises a vibration table 10, a pressure container 20, a vibration damping foundation 40 and a building model 30. The pressure vessel 20 is provided with a flexible pipe 50 communicated with the pressure vessel 20, the height of the flexible pipe 50 relative to the pressure vessel 20 is adjustable, the pressure vessel 20 is arranged on a workbench of the vibrating table 10, the pressure vessel 20 is filled with a liquid medium, the liquid level of the liquid medium in the flexible pipe 50 can be adjusted according to the height of the flexible pipe 50, a vibration damping foundation is arranged in the pressure vessel, the building model 30 is provided with a building substrate, the building substrate is connected with the vibration damping foundation 40 (such as surface connection or multi-point support connection), the vibration damping foundation 40 can play a role in damping the building model 30, the building substrate and the vibration damping foundation 40 are arranged in the pressure vessel 20, and the building model 30 is movably connected with the pressure vessel 20, so that when the vibrating table 10 is started, the building model 30 can move relative to the pressure vessel 20, the height of the liquid level in the flexible pipe 50 can be adjusted, the liquid level is different, and the water pressure in the pressure vessel 20 is different, so that the change of the vibration damping effect on the vibration damping foundation 40 under different water pressures can be simulated. Meanwhile, as the mechanical compressor is not required to be adopted to increase the water pressure, the pressure vessel 20 can be relatively reduced, the length of the flexible pipe 50 can be lengthened and raised according to actual needs, the production cost of products can be reduced, and the influence of the additional weight of an experimental device on the load of the vibrating table 10 can be reduced.
Specifically, according to the pascal principle, the hydrostatic pressure P of the vibration damping foundation 40 buried in water is: p=ρg (h+h). Where ρ is the density of the liquid in the pressure vessel 20, g is the gravitational acceleration, H is the height of the liquid level in the pressure vessel 20, H is the height between the liquid level of the liquid in the flexible tube 50 and the liquid level of the liquid in the pressure vessel 20, and the pressure at the vibration damping foundation 40 in the pressure vessel 20 is changed by changing the liquid level of the flexible tube 50. The liquid in the pressure vessel 20 and the flexible tube 50 may be pure water or an acid-base solution to simulate the influence of water pressure or acid-base solution corrosion coupling effect on the vibration damping effect of the vibration damping foundation 40, and if the acid-base solution is selected, the corrosiveness of the pressure vessel 20 needs to be verified to ensure that the pressure vessel 20 is not corroded by the acid-base solution. Because flexible tube 50 is easier to install, if the water pressure required in the experiment is high and the vertical space in the laboratory is sufficient, flexible tube 50 can be optionally lifted indoors and along the laboratory walls or posts to increase h; if the laboratory room vertical space is not sufficient, the flexible tube 50 may be optionally pulled out of the room and then raised along the laboratory exterior wall to increase h.
Further, if the building base is not immersed in water, the bottom area of the building base is a, the compressive stress of the building base is σ, the mass of the building model above the building base is M, and the weight M to be added thereto should be:
Wherein g is gravitational acceleration.
If the building substrate of the building model is soaked by water and the static water pressure P of the building substrate buried in the water is the same, the weight M to be added at the moment is as follows:
Wherein, building basement still water pressure P is:
P＝ρg(H+h)
the weight M should thus be:
Thus, M and h can be reasonably adjusted to balance the above equation. I.e. sigma is the compressive stress value that the vibration damping foundation should reach, A and m are the bottom surface area and mass of the model, respectively, and m 0 is the equivalent counterweight mass due to the increased building foundation pressure. If the load capacity of the vibrating table 10 is enough, a certain H and H can be set, and then a single compressive stress value is simply kept by adjusting M; if the load capacity of the vibrating table 10 is limited and an experiment cannot be performed by increasing M, the equivalent weight can be increased by increasing H, and the equivalent weight mass calculation formula is M 0 =ρ (h+h) a.
In addition, even if the load capacity of the vibration table 10 is enough, the design base compressive stress needs to be changed in the experimental process, and the replacement of the counterweight M is inconvenient, the experimental effect can be achieved by a method of adjusting the equivalent counterweight mass M 0 by increasing or decreasing h.
According to an embodiment of the present invention, the pressure vessel 20 includes a first water tank 201 and a second water tank 202 communicating with the first water tank 201, the first water tank 201 being disposed to extend in a height direction, the second water tank 202 being disposed on a bottom side of the first water tank 201 and extending in a horizontal direction in a direction away from the first water tank 201; wherein the flexible pipe 50 is provided at the top of the first water tank 201 and is communicated with the first water tank 201, and the building base and the vibration damping foundation 40 are provided in the second water tank 202.
The pressure vessel 20 includes first water tank 201 and second water tank 202, first water tank 201 extends along the direction of height and sets up, second water tank 202 locates bottom one side of first water tank 201 and is linked together with first water tank 201, and second water tank 202 extends along the horizontal direction, be convenient for building model 30 and second water tank 202 assembly connection simultaneously, through locating flexible pipe 50 at the top of first water tank 201 and be linked together with first water tank 201, locate building substrate and damping basis 40 in second water tank 202, be convenient for adjust the liquid level of liquid medium in the pressure vessel 20, and then be convenient for analyze the influence to damping effect of damping basis 40 under the different water pressures.
Specifically, the first tank 201 and the second tank 202 may be integrally formed or may be connected by bonding, but the bonding portion needs to be sealed to ensure the sealing performance of the pressure vessel 20. Meanwhile, in order to reduce the weight of the pressure vessel 20 on the table surface of the vibration table 10, the shape of the pressure vessel 20 may be changed or the size of the water tank may be reduced, i.e., the second water tank 202 may be designed into a corresponding cubic structure according to the building structure, the first water tank 201 may be designed into a square, rectangular or circular shape of a small chassis, and by reducing the height and size of the first water tank 201, the additional volume and additional weight of the water tank and the internal liquid may be reduced and reduced to the maximum.
According to one embodiment of the present invention, the building model 30 further comprises a building body, the building body comprises building floors 301 and building columns 302 fixedly connected with the building floors 301, building bases are arranged at the bottoms of the building floors 301, and the building columns 302 are arranged between two adjacent building floors 301 and extend in the vertical direction; wherein the building column 302 is movably coupled to the second tank 202 as shown in fig. 2.
The building model 30 further comprises a building body, the building body comprises building floors 301 and building upright posts 302 fixedly connected with the building floors 301, the building floors are of a cube sheet structure, the building upright posts 302 are arranged between two adjacent building floors 301 and extend in the vertical direction, the building upright posts 302 are movably connected with the second water tank 202, the building upright posts 302 can reciprocate relative to the second water tank 202 (such as move in the height direction or move in the horizontal direction) under the vibration influence of the vibrating table 10, the building upright posts 302 drive the building floors 301 to move, building foundations are arranged at the bottoms of the building floors 301 and are connected with the vibration reduction foundations 40, and accordingly the influence on the vibration reduction effect of the vibration reduction foundations 40 arranged at the bottoms of the building model 30 under different water pressures can be analyzed.
According to one embodiment of the invention, the second tank 202 comprises a top plate 2021, the top plate 2021 defining a movable slot 2022, a piston rod 3021 being provided on the building stud 302, the piston rod 3021 being provided in the movable slot 2022 and being adapted to reciprocate relative to the movable slot 2022, as shown in fig. 3 and 4.
The second water tank 202 is provided with a top plate 2021, the movable groove 2022 is defined on the top plate 2021, the piston rod 3021 matched with the movable groove 2022 is arranged on the building upright post 302, and the piston rod 3021 is inserted into the movable groove 2022 and moves relative to the extending direction of the movable groove 2022 so as to drive the building floor 301 to move relative to the second water tank 202.
According to one embodiment of the present invention, the active groove 2022 is extended in a horizontal direction as shown in fig. 3.
According to another embodiment of the present invention, the movable groove 2022 is extended in the vertical direction, as shown in fig. 4.
The direction of the arrangement of the movable groove 2022 is not limited, and may be set in the horizontal direction or in the vertical direction in order to analyze the influence on the vibration damping effect of the vibration damping base 40 when vibrating in different directions under different water pressures.
According to another embodiment of the present invention, the vibration-damping foundation building model vibration-table test system 1 of adjustable water pressure further includes: a seal (not shown) is provided on the outer circumference of the piston rod 3021 and cooperates with the movable groove 2022 to seal the gap between the building stud 302 and the top plate 2021.
By arranging the sealing member (such as a sealing piston or a sealing sleeve) on the outer periphery of the piston rod 3021, when the piston rod 3021 moves relative to the movable groove 2022, the sealing member will elastically deform to achieve a sealing effect, so as to prevent the liquid in the pressure container 20 from flowing out from the gap between the building upright post 302 and the top plate 2021, thereby improving the stability and safety of the product during the test. Of course, a sealing canvas may be provided in the gap between the building upright 302 and the roof 2021 to perform sealing function, and the sealing canvas should have a certain strength and be not easily deformed under a certain water pressure.
According to one embodiment of the present invention, the first water tank 201 is cylindrical; the second water tank 202 is cube-shaped; the diameter of the first water tank 201 is in the range of 10cm to 20 cm; the height of the first water tank 201 is in the range of 20cm to 30 cm; the top of the first water tank 201 is provided with a water injection pipe 2011 corresponding to the pipe diameter of the flexible pipe 50, and the flexible pipe 50 is communicated with the water injection pipe 2011.
The first water tank 201 is cylindrical, the second water tank 202 is cube-shaped, both the cylindrical structure and the cube structure are regular, the processing and the forming are convenient, the device is suitable for batch production, and the attractive appearance of the product is improved.
The diameter of the first water tank 201 is in the range of 10cm to 20cm, and the height of the first water tank 201 is in the range of 20cm to 30cm, which is convenient for controlling the liquid level of the pressure vessel 20, and helps to reduce the volume and weight of the product, so as to reduce the influence of the additional weight of the pressure vessel 20 on the vibration table 10.
Through set up in the water injection pipe 2011 that flexible pipe 50 is linked together at the top of first water tank 201, water injection pipe 2011 corresponds with the pipe diameter of flexible pipe 50 to sealing connection, and help improving the reliability of connection.
According to an embodiment of the present invention, the first water tank 201 is provided with graduation marks on a wall surface extending in the height direction.
By providing the graduation marks on the wall surface of the first water tank 201 extending in the height direction, the pressure value can be determined quickly by the liquid level height corresponding to the graduation marks.
In some embodiments, the top of the first water tank 201 is provided with a vent 2012, and a sealing plug is provided on the vent 2012.
By providing the vent 2012 at the top of the first water tank 201 (the top of the first water tank 201 is higher than the top of the second water tank 202), and providing the sealing plug on the vent 2012, the vent 2012 is opened when water is injected into the pressure vessel 20, so that the gas in the pressure vessel 20 can be rapidly discharged, thereby helping to improve the water injection efficiency. When the water injection is completed, the sealing plug is plugged on the vent 2012, so that the sealing of the pressure container 20 is realized, and water flow is prevented from flowing out of the vent 2012.
According to one embodiment of the present invention, the vibration-damping foundation building model vibration-table test system 1 of adjustable water pressure further includes: the support frame 60, the support frame 60 is used for fixing the flexible pipe 50, and scale marks are arranged on the support frame 60, as shown in fig. 1.
The vibration table testing system 1 for the vibration damping foundation building model with adjustable water pressure further comprises a supporting frame 60, one end of the supporting frame 60 is used for being fixed with the ground, the other end of the supporting frame 60 is used for supporting the flexible pipe 50 so as to fix the position of the flexible pipe 50, and scale marks are arranged on the supporting frame 60, so that the height of the liquid level in the flexible pipe 50 can be rapidly determined according to the scale marks, and further the pressure value of water in the pressure container 20 can be rapidly determined.
In some embodiments, the damping base 40 includes an elastic cushion or laminated rubber mount.
The vibration damping foundation 40 includes an elastic cushion or a laminated rubber mount, one end surface of which is mounted on the inner bottom plate of the pressure vessel, and the other end surface corresponding thereto is connected to the building base surface, thereby suspending the building base to achieve vibration damping effect. The laminated rubber supports are supported by the building foundation points, so that the building foundation is suspended, and the vibration reduction effect is achieved.
In some embodiments, flexible tube 50 is a rubber tube.
The flexible tube 50 is a rubber tube that is flexible, easy to secure and easy to adjust in height relative to the pressure vessel 20.
In some embodiments, the pressure vessel 20 is a glass vessel.
The pressure vessel 20 is a glass vessel, so that the internal working condition of the pressure vessel 20 can be conveniently observed, the processing technology of the glass vessel is mature, the production cost of products can be reduced, and meanwhile, the glass vessel has certain strength, and is convenient to assemble and fix with the building model 30.
In summary, according to the test system for the vibration table of the vibration damping foundation building model with the adjustable water pressure, provided by the invention, the liquid level in the flexible pipe can be adjusted only by adjusting the height of the flexible pipe, so that the water pressure born by the vibration damping foundation buried in water can be adjusted, further, the vibration damping effect change caused by the quaternary water pressure change can be conveniently tested, and the influence of different water pressure changes on the vibration damping effect of the vibration damping foundation can be analyzed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. A test system of a vibration table of a vibration reduction basic building model with adjustable water pressure is characterized in that,
A vibration table;
The pressure vessel is pressed on the vibrating table, a flexible pipe is arranged on the pressure vessel, the flexible pipe is communicated with the inside of the pressure vessel, and the height of the flexible pipe relative to the pressure vessel can be adjusted;
The vibration reduction foundation is arranged in the pressure container;
A building model comprising a building base connected to the vibration reduction foundation;
When the vibrating table is started, the building model can move relative to the pressure container, the height of the liquid level in the flexible pipe can be adjusted by adjusting the height of the flexible pipe relative to the pressure container, the liquid level is different, and the water pressure in the pressure container is different, so that the change of the vibration effect of the vibration damping foundation under different water pressures can be simulated;
the pressure container comprises a first water tank and a second water tank communicated with the first water tank, the first water tank is arranged in an extending mode along the height direction, and the second water tank is arranged on one side of the bottom of the first water tank and extends along the horizontal direction in a direction away from the first water tank;
The flexible pipe is arranged at the top of the first water tank and is communicated with the first water tank, and the building substrate and the vibration reduction foundation are arranged in the second water tank;
The building model also comprises a building body, wherein the building body comprises building floor slabs and building upright posts fixedly connected with the building floor slabs, the building floor slabs are of cube sheet structures, the bottom of each building floor slab is provided with a building substrate, and the building upright posts are arranged between two adjacent building floor slabs and extend along the vertical direction;
wherein the building upright post is movably connected with the second water tank;
the second water tank comprises a top plate, the top plate is limited with a movable groove, a piston rod is arranged on the building upright post, and the piston rod is arranged in the movable groove and is suitable for reciprocating motion relative to the movable groove;
the movable groove extends along the horizontal direction; or alternatively
The movable groove extends along the vertical direction.
2. The hydraulic pressure-adjustable vibration-damping foundation building model vibration-table testing system according to claim 1, further comprising:
and the sealing piece is arranged on the outer periphery of the piston rod and matched with the movable groove so as to seal a gap between the building upright post and the top plate.
3. The hydraulic pressure adjustable vibration damping basic building model vibration platform testing system according to claim 1, wherein,
The first water tank is cylindrical;
The second water tank is cube-shaped;
The diameter of the first water tank is in the range of 10 cm-20 cm;
the height of the first water tank is within the range of 20 cm-30 cm;
The top of the first water tank is provided with a water injection pipe corresponding to the pipe diameter of the flexible pipe, and the flexible pipe is communicated with the water injection pipe.
4. The hydraulic pressure adjustable vibration damping basic building model vibration platform testing system according to claim 1, wherein,
The wall surface of the first water tank, which is arranged in the extending way along the height direction, is provided with scale marks; and/or
The top of first water tank is equipped with the exhaust hole, just be equipped with the sealing plug on the exhaust hole.
5. The hydraulic pressure-adjustable vibration-damping foundation building model vibration-table testing system according to claim 1, further comprising:
The support frame is used for fixing the flexible pipe, and scale marks are arranged on the support frame.
6. The hydraulic pressure adjustable vibration damping basic building model vibration platform testing system according to claim 1, wherein,
The vibration reduction foundation comprises an elastic cushion layer or a laminated rubber support; and/or
The flexible pipe is a rubber pipe; and/or
The pressure vessel is a glass vessel.
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| CN114542658B (en) * | 2022-03-04 | 2024-03-12 | 西安热工研究院有限公司 | Nuclear power station vibration reduction system based on circulating water pump |
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