Wave-current test device for suspended tunnel structure

Abstract

The application discloses a kind of suspended tunnel structure wave flow test device, comprising: test pool, wave and current generating device, plastic net wave-absorbing device, vibrating table, extension platform, excitation controller, suspended pipe body model, anchor cable and hydrodynamic test system.The application can apply controllable multi-point excitation, and can also test the hydrodynamic response of suspended tunnel to simulated earthquake simultaneously, and can adjust the excitation size, position and range according to actual model requirements, so as to realize response analysis and coordinated control under the combined action of multi-point different excitation earthquake and wave flow.

Description

TECHNICAL FIELD

[0001] The present application relates to simulation test and testing technology of civil engineering, water conservancy and the like, and particularly relates to a wave-current test device for a suspended tunnel structure. BACKGROUND

[0002] The suspended tunnel is a new type of traffic structure for crossing straits, lakes and other deep and wide water areas, which is generally composed of a tubular structure submerged in water at a certain depth, underwater anchor bases and anchor cables, and structures connected to both banks. The overall stability of the system is maintained by gravity, buoyancy and the tension of the anchor cables. Such a structure will be severely damaged when it encounters extreme sea conditions such as earthquakes, wave-current loads, etc. in a complex marine environment. Therefore, it is urgent to find out the hydrodynamic characteristics and responses under the action of loads such as earthquakes, wave-current loads, etc. However, the current theoretical calculation method and finite element software make many assumptions and simplifications, resulting in a large deviation between the calculation results and the actual values, and cannot provide reliable guidance for actual engineering. The model test method can obtain test results under controllable environmental excitation, has intuitive reliability, is widely recognized and is often used to verify the calculation results. Therefore, it is of great significance to carry out model test research on suspended tunnels under extreme environmental excitation.

[0003] However, due to the limitations of test cost and site, there is usually only one shaking table, which cannot realize the simulation of real underwater multi-point excitation, and cannot realize the combined action of multi-point different seismic excitation and wave-current. Therefore, it is urgent to develop a wave-current test device for a suspended tunnel structure.

[0004] At present, the device and method of suspension tunnel seismic test include: the patent with application number CN201910564251.5 discloses a seismic and wave flow coupling effect under the suspension tunnel dynamic response test device and method, the wave flow is generated by the wave making and flow making device, the shaking table simulates the earthquake, the three-dimensional movement and stress condition of the underwater suspension tunnel under the action of wave flow load are realized; but the test does not consider the non-uniform excitation of the earthquake, the vibration excitation of each region cannot be applied non-uniformly, and the collaborative test control method is not involved. The patent with application number CN202110461692.X discloses a dynamic response test model and method of suspension tunnel under the action of earthquake and wave flow, the seismic load is applied through a small shaking table, a mechanical transmission device and a sliding false bottom, and the dynamic response test of the suspension tunnel under the combined action of various seismic loads and wave flow loads is realized; but the test cannot apply different excitations at multiple points, and the collaborative test control method is not involved. The patent with application number CN201910925226.5 discloses a suspension tunnel seismic and flow-induced vibration composite test simulation device, in a water tank filled with water, a suspension pipeline model is supported by a steel frame base, two ends of the steel frame are installed on two shaking tables, and differential simulation is realized through the two shaking tables; but the test needs two shaking tables to realize, only the differential simulation can be applied to the two ends of the suspension tunnel, the influence of the seismic excitation in the middle region is ignored, and three or more seismic excitations cannot be realized. The patent with application number CN201410115122.5 discloses an underwater multi-point excitation pseudo-dynamic test system, a plurality of excitation mechanisms are arranged below the suspension tunnel, linear reciprocating motion in three directions is realized through the excitation mechanisms, thereby realizing multi-point seismic excitation; but the water tank bottom plate needs to be processed, the actuation position is fixed and cannot be adjusted, the test model is fixed and cannot be changed, and the collaborative test control method is not involved. SUMMARY

[0005] In view of the problems and deficiencies of the prior art, the present application designs a suspension tunnel structure wave flow test device, which can apply controllable multi-point excitation, simultaneously cooperatively test the hydrodynamic response of the suspension tunnel to the simulated earthquake, and adjust the excitation size, position and range according to the actual model requirements, thereby realizing response analysis and collaborative control under the combined action of multi-point different excitation earthquake and wave flow.

[0006] The invention aims to overcome the deficiencies of the prior art and provide a suspension tunnel multi-point seismic excitation and wave flow interaction water dynamic test and collaborative test, which uses a small vibration table to achieve collaborative control of multi-point different seismic excitation and wave flow interaction of a large model, can fully consider the effect of seismic input direction on water dynamic response, and more accurately simulate the combined effect of seismic and wave flow under multi-point excitation. The control of multi-point excitation is simple and convenient, and has strong operability. The transmission device is convenient to disassemble and install, can adjust the multi-point excitation position, adapt to different scale models, can adjust the action range of the earthquake, adapt to different working conditions, has high adjustability, wide application range, and greatly reduces the test cost and site equipment requirements.

[0007] According to one aspect of the present application, a suspension tunnel structure wave flow test device is provided, comprising:

[0008] a wave and current generating device in a test pool, a plastic net-shaped wave absorbing device, a vibration table, an expansion platform, an excitation controller, a suspension tunnel pipe body model, an anchor cable, and a water dynamic test system;

[0009] The water level of the test pool is controllable, the wave and current generating device is arranged on one side of the test pool, and the plastic net-shaped wave absorbing device is arranged in the remaining side walls, and the wave and current generation is controllable. The vibration table is installed in the middle of the test pool and has a waterproof function. The expansion platform is rigidly connected to the vibration table. The excitation controller is arranged on the expansion platform in multiple groups and is arranged according to actual needs. The suspension tunnel pipe body model is installed above the multiple groups of excitation controllers and is submerged in the water body. One end of the anchor cable is connected to the suspension tunnel pipe body through a tension meter and a displacement meter, and the other end is connected to the excitation controller. The water dynamic test system includes an accelerometer, a tension meter, a displacement meter, an inclinometer, a water level meter, a wave height meter, a flow meter, and an acquisition device, which respectively measure the acceleration and swing angle of the suspension tunnel, the tension and displacement of the anchor cable, and the water depth, wave height, and flow velocity parameters, and collaboratively test the water dynamic response.

[0010] Further, the expansion platform and the vibration table are provided with threaded holes and are connected and fastened by bolts.

[0011] Further, the excitation controller is composed of a shell, an elastic support, an electromagnet, an excitation conducting block, and an excitation conducting plate.

[0012] Further, the lower end cover of the shell is provided with a thread, the excitation conducting plate is provided with a thread, the lower end cover thread and the widened steel plate are connected and fastened by the bolts, and the upper end cover of the shell and the center of the excitation conducting plate are provided with a cover hole.

[0013] Further, the excitation conducting block comprises a square steel block and a cylindrical steel core, the square steel block is installed in the shell, one section of the cylindrical steel core is in the shell, another section of the cylindrical steel core passes through the hole of the cover plate and extends to the outside of the shell and is connected with the anchor cable, and an outer section of the cylindrical steel core is provided with external threads and is connected with the excitation conducting plate through a nut.

[0014] Further, waterproof cloth is used to connect the hole of the cover plate and the cylindrical steel core.

[0015] Further, the square steel block is provided with a bottom surface and side surfaces, and the bottom surface and the side surfaces are respectively provided with the elastic support and the electromagnet, one end of the elastic support is connected with the shell, and the other end of the elastic support is connected with the square steel block, and a gap is reserved between the electromagnet and the square steel block.

[0016] Further, the simulated earthquake excitation generated by the vibration table is input to different anchor points through the excitation controller, the feedback of actual excitation is completed by the water power test system in cooperation with the test of water power response, the electromagnetic force of the excitation controller is adjusted to realize the regulation of the frequency and amplitude of the earthquake excitation, and the water power test model is realized.

[0017] According to another aspect of the present application, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to realize the steps in the wave-current test device for a suspended tunnel structure.

[0018] According to another aspect of the present application, a computer device is provided, and the computer device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor realizes the steps in the wave-current test device for a suspended tunnel structure when executing the program.

[0019] Compared with the prior art, the present application has at least the following beneficial effects:

[0020] 1. The present application can realize the response test of a suspended tunnel structure under the combined action of different excitations at multiple points and wave flow, and can realize the cooperative control of different earthquake excitations at multiple points and wave flow for a large model under a small vibration table, and has strong operability.

[0021] 2. The present application can realize the underwater earthquake simulation test, realize the synchronous or asynchronous loading of each control point under the given seismic motion parameters, and can simulate the action of earthquake on the water power response of the structure.

[0022] 3. The excitation regulation device is convenient to disassemble and install, can adjust the position of earthquake excitation, is suitable for different scale models, can adjust the range of earthquake action, is suitable for different working conditions, has a wide application range, and greatly reduces the test cost and the requirement for site equipment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the suspended tunnel model and device of the present invention;

[0026] Figure 3 This is a schematic diagram showing the connection between the excitation controller, the extended platform, and the suspended tunnel model of the present invention.

[0027] Figure 4 This is an isometric view of the excitation controller of the present invention;

[0028] Figure 5 This is a cross-sectional view of the excitation controller of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention.

[0030] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0031] like Figures 1-5 As shown,

[0032] Example 1:

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0034] like Figure 1 As shown, this invention proposes a wave and current test device for a suspended tunnel structure, which includes a test water tank, a wave and current generating device, a plastic mesh wave damping device, a vibration table, an extended platform, an excitation controller, a suspended tube model, anchor cables, and a hydrodynamic testing system.

[0035] The water level of the test pool 1 can be adjusted and controlled, and a wave and current generating device 2 is arranged on one side of the test pool 1. The wave and current generating device 2 generates waves and currents by inputting wave parameters through a computer. A plastic net-shaped wave absorbing device 3 is arranged in the remaining side wall to reduce wave reflection. A vibration table 4 is installed in the middle of the test pool 1. An extension platform 5 is rigidly connected to the vibration table 4. A plurality of excitation controllers 6 are arranged on the extension platform 5. The extension platform 5 increases the installation range of the excitation controllers 6. The excitation controllers 6 are arranged according to the actual installation point requirements. A suspended tunnel pipe body model 7 is installed above the plurality of excitation controllers 6 and is immersed in the water body. An anchor cable 8 is connected to the suspended tunnel pipe body 7 at one end of the anchor cable 8 through a tension meter and a displacement meter. The other end of the anchor cable 8 is connected to a posture transmission device 6. The posture transmission device 6 can select excitation controllers at different positions to realize experimental research under different anchor cable arrangement forms. The acceleration and swing angle of the suspended tunnel 7 and the tension and displacement of the anchor cable 8 are tested by the hydrodynamic test system 9. The acceleration is measured by the accelerometer 91 installed in the suspended tunnel model 8. The tension is measured by the tension meter 92 at the end of the anchor cable 8. The displacement is measured by the displacement meter 93 at the end of the anchor cable 8. The swing angle is measured by the inclinometer 94 installed at the top of the suspended tunnel model 8. In addition, the water level meter 9, the wave height meter 96, and the flow velocity meter 97 measure the water depth, the wave height, and the flow velocity parameters, respectively, to cooperatively test the hydrodynamic response.

[0036] As shown in Figure 2 and Figure 3 , the extension platform 5 and the vibration table 4 are provided with bolt holes and are connected and fastened by bolts 51.

[0037] As shown in Figure 3 , Figure 4 and Figure 5 , the excitation controller 6 is composed of a shell 61, an elastic support 62, an electromagnet 63, an excitation conduction block 64, and an excitation conduction plate 65. The lower end cover of the shell 61 is provided with a thread 611. The lower end cover thread 612 and the widened steel plate 5 are connected and fastened by the bolts 51. The upper end cover of the shell 61 and the center of the excitation conduction plate 65 are provided with a cover hole 612. The excitation conduction block 64 includes a square steel block 641 and a cylindrical steel core 642. The square steel block 641 is installed in the shell 61. One section of the cylindrical steel core 642 is in the shell 61, and the other section extends to the outside of the shell 61 and is connected with the anchor cable 8. One section of the cylindrical steel core 642 outside is provided with an external thread and is connected and fastened with the excitation conduction plate 65 through a nut 651. The cover hole 612 and the cylindrical steel core 642 are connected with a waterproof cloth 613 to prevent water from entering the inside of the posture transmission device 6. The square steel block 641 is provided with the elastic support 62 and the electromagnet 63 on the bottom surface and the side surface, respectively. One end of the elastic support 62 and the electromagnet 63 is connected with the shell 61, and the other end is connected with the square steel block 641. There is a gap between the electromagnet 63 and the square steel block 641.

[0038] When the vibration table 4 vibrates at a certain frequency, the vibration is transmitted to the shell 61 of the excitation regulator through the extension platform 5, and the elastic support 62 and the electromagnet 63 are installed on the side and bottom of the shell 61. The electromagnet 63 generates a magnetic field with sufficient strength by changing the size of the external current during structural vibration, and applies different sizes of electromagnetic force to the excitation conductor 64 at different times, which changes the overall stiffness of the transmission system at all times, and in turn changes the frequency and amplitude of the shell 61 transmitted to the excitation conductor 64, and the vibration is transmitted to the excitation conductor plate 65 and the anchor cable 8. The current of each excitation regulator 6 is controlled to be applied, thereby realizing multi-point excitation.

[0039] Embodiment 2

[0040] The computer readable storage medium of the embodiment stores a computer program, and the program is executed by a processor to realize the steps in the suspended tunnel structure wave flow test device of embodiment 1.

[0041] The computer readable storage medium of the embodiment can be an internal storage unit of a terminal, such as a hard disk or a memory of the terminal; the computer readable storage medium of the embodiment can also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, etc. of the terminal; further, the computer readable storage medium can include both an internal storage unit and an external storage device of the terminal.

[0042] The computer readable storage medium of the embodiment is used to store a computer program and other programs and data required by the terminal, and the computer readable storage medium can also be used to temporarily store data that has been output or will be output.

[0043] Embodiment 3

[0044] The computer device of the embodiment includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to realize the steps in the suspended tunnel structure wave flow test device of embodiment 1.

[0045] In the embodiment, the processor can be a central processing unit, and can also be other general-purpose processors, digital signal processors, application-specific integrated circuits, ready programmable gate arrays, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc. The memory can include read-only memory and random access memory, and provide instructions and data to the processor, and a part of the memory can also include non-volatile random access memory, such as a memory that can also store device type information.

[0046] Those skilled in the art will appreciate that embodiments disclosed herein can be provided as methods, systems, or computer program products. Accordingly, embodiments can be provided in the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Also, embodiments can be provided in the form of computer program products embodied on one or more computer-usable storage media (including, but not limited to, disk memory and optical memory) having computer usable program code embodied thereon.

[0047] Embodiments are described herein with reference to flowchart illustrations and / or block diagrams of methods, and computer program products according to embodiments of the present application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0048] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0049] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams. Figure One one or more functions specified in the flowchart illustrations and / or block diagrams.

[0050] Those skilled in the art will appreciate that implementing all or part of the methods described above in the embodiments can be accomplished by way of computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams.

[0051] The examples described herein are merely illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application. Any variation and modification of the present application, which do not depart from the spirit and scope of the present application, should be construed as falling within the scope of the present application.

Claims

1. A wave-current testing device for a suspended tunnel structure, characterized in that, include: Test water tank, wave-generating and current-generating device, plastic mesh wave-damping device, vibration table, extended platform, excitation controller, suspended pipe model, anchor cable and hydrodynamic testing system; The test water tank has an adjustable water level; The wave-generating and current-generating device is installed on one side of the test pool. The wave-generating and current-generating device generates waves and currents by inputting wave parameters into a computer. The plastic mesh wave-damping device is installed on the other three sides of the test pool to reduce wave reflection. The vibration table is located in the middle of the test water tank; The extended platform is rigidly connected to the vibration table. Multiple sets of the excitation controllers are arranged on the extended platform. The extended platform increases the installation range of the excitation controllers. The excitation controllers are selected and arranged according to the actual installation points. The suspended tube model is installed above multiple sets of excitation controllers and is submerged in water. The anchor cable has a tension gauge and a displacement gauge installed at one end and connected to the suspended tube model, and the other end is connected to an attitude actuator to select the excitation controller at different positions, so as to realize experimental research under different anchor cable arrangement forms.

2. The apparatus according to claim 1, characterized in that, The extended platform and the vibration table have threaded holes and are connected and fastened by bolts.

3. The apparatus according to claim 1, characterized in that, The excitation controller consists of a housing, an elastic support, an electromagnet, an excitation transmission block, and an excitation transmission plate.

4. The apparatus according to claim 3, characterized in that, The outer casing includes an upper end cover and a lower end cover. The lower end cover is threaded, and the excitation transmission plate is threaded. The lower end cover thread and the expansion platform are connected and fastened by bolts. The upper end cover and the excitation transmission plate are provided with cover plate holes at their centers.

5. The apparatus according to claim 4, characterized in that, The excitation transmission block includes a square steel block and a cylindrical steel core. The square steel block is installed inside the outer shell. One part of the cylindrical steel core is inside the outer shell, and the other part extends through the cover plate hole to the outside of the outer shell and is connected to the anchor cable. The outer part of the cylindrical steel core has external threads and is connected and fastened to the excitation transmission plate by a nut.

6. The apparatus according to claim 5, characterized in that, The cover hole and the cylindrical steel core are connected by a waterproof cloth.

7. The apparatus according to claim 6, characterized in that, The square steel block has elastic support members and electromagnets installed on its bottom and sides, respectively; one end of the elastic support member and the electromagnet are connected to the outer shell, and the other end is connected to the square steel block, with a gap between the electromagnet and the square steel block.

8. The apparatus according to claim 1, characterized in that, The simulated seismic excitation generated by the shaking table is used by the excitation controller to input different seismic excitations at each anchoring point. The hydrodynamic testing system coordinates the testing of the hydrodynamic response to complete the feedback of the actual excitation. The electromagnetic force of the excitation controller is adjusted to control the seismic excitation frequency and amplitude, thereby realizing the coordinated testing of the hydrodynamic test model.

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