Vibration table device under action of wave force

Abstract

The utility model discloses a vibration table device under the action of wave force. The vibration table device comprises a counter-force frame, a bearing base, an actuating mechanism and a wave making mechanism, the counter-force frame comprises a counter-force base and a stand column. The counter-force base is connected to the ground; the stand columns are vertically arranged left and right and connected to the counter-force base. The bearing base is connected to the ground; the actuating mechanism comprises a longitudinal actuating arm, a transverse actuating arm and a vibrating table; the longitudinal actuating arm is connected to the bearing base in a sliding mode in the transverse direction. The transverse actuating arm is slidably connected to the stand column in the longitudinal direction. The vibrating table is positioned above the longitudinal actuating arm and is connected with the longitudinal actuating arm and the transverse actuating arm; the wave making mechanism comprises a model groove, an air compression type wave making device and a damping type wave absorbing device; the model groove is connected above the vibration table; the air compression type wave making device and the damping type wave absorbing device are connected to the inner wall of the model groove. The device can effectively simulate the influence of earthquakes on wave loads in the structural damage process, and the effect generated by non-uniform seismic excitation can be well achieved.

Description

Technical Field

[0001] The utility model relates to the field of underwater structure earthquake engineering, in particular to a vibration table device under the action of wave force. Background Art

[0002] Currently, the field of underwater structural earthquake engineering lacks sufficient measured earthquake data and data on the damage caused by wave loads to structures. Research is usually conducted through indoor shaking table tests. Shaking table test devices are important tools in fields such as earthquake engineering, structural dynamics, and vibration control, providing critical experimental data and theoretical support for structural safety and performance optimization. However, existing devices are deficient in their research on wave loads when simulating the seismic response of underwater structures. Because the oscillation frequency of waves has a certain similarity to the frequency of earthquakes, the limitations of existing shaking table devices prevent them from generating waves of the corresponding frequency, making it difficult to simulate the simultaneous effects of earthquake and wave loads on the structure in the original environment, which has a direct impact on the reliability of the test results. For this reason, the generation and effect of wave loads in shaking table tests are directly related to the success of the test and become a crucial part of the preliminary preparation and design of shaking table tests. Utility Model Content

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a vibration table device under the action of wave forces. The vibration table device under the action of wave forces can effectively simulate the influence of wave loads in the process of earthquake on structural destruction, can better achieve the effect of non-uniform seismic excitation, and has a simple structure and is easy to manufacture and install.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A vibration table device subjected to wave force comprises a reaction frame, a bearing base, an actuating mechanism and a wave-making mechanism; the reaction frame comprises a reaction base and a column; the reaction base is connected to the ground; the columns are vertically arranged on the left and right and connected to the reaction base; the bearing base is connected to the ground; the actuating mechanism comprises a longitudinal actuating arm, a transverse actuating arm and a vibration table; the longitudinal actuating arm is connected to the bearing base in a transverse sliding manner; the transverse actuating arm is connected to the column in a longitudinal sliding manner; the vibration table is located above the longitudinal actuating arm and is connected to the longitudinal actuating arm and the transverse actuating arm; the wave-making mechanism comprises a model trough, an air compression wave-making device and a damping wave-absorbing device; the model trough is connected above the vibration table; the air compression wave-making device is connected to the left inner wall of the model trough; and the damping wave-absorbing device is connected to the right inner wall of the model trough.

[0006] Preferably, the reaction frame further includes a ring beam, and there are four columns, which are respectively arranged on the front, back, left and right sides of the bearing base. The reaction base is connected to the ground by bolts. The ring beam is rectangular and connected to the middle position of the four columns.

[0007] Preferably, longitudinal slide rails are provided on the opposite sides of the left and right columns, and the transverse actuating arm includes a longitudinal slide, which is slidably connected to the longitudinal slide rails; a transverse slide rail is provided on the supporting base, and the longitudinal actuating arm includes a transverse slide, which is slidably connected to the transverse slide rails.

[0008] Preferably, the transverse actuating arm includes a transverse oil cylinder, a transverse piston rod, a transverse connecting ring and a fixed plate; the transverse oil cylinder is horizontally arranged and connected to the longitudinal slide; the transverse piston rod is telescopically connected to the transverse oil cylinder; the transverse connecting ring is connected to the transverse piston rod; the fixed plate is connected to the transverse connecting ring by a fixing bolt, and the fixed plate is connected to the vibration table.

[0009] Preferably, the longitudinal actuating arm includes a longitudinal connecting ring, a longitudinal cylinder, a longitudinal piston rod and a connecting support; the longitudinal connecting ring is connected to the transverse slide by a fixing bolt; the longitudinal cylinder is connected to the longitudinal connecting ring; the longitudinal piston rod is telescopically connected to the longitudinal cylinder; the connecting support is hinged to the longitudinal piston rod and connected to the vibration table.

[0010] Preferably, the air compression wave-making device includes an air bin, an air compression bin A, an air compression bin B and several air compression driving units; each air compression driving unit includes a motor, an air pressure tank, an air compression pipe A, an air compression pipe B, an air compression plate A, and an air compression plate B; the air bin is located on the leftmost side of the model tank, and the bottom of its right side wall is connected to the bottom wall of the model tank; the air compression bin A is located on the right side of the air bin, and the bottom of its right side wall is higher than the bottom wall of the model tank; the air compression bin B is located on the right side of the air compression bin A, and the bottom of its right side wall is higher than the bottom wall of the model tank; the motor is located in the air bin and connected to the left side wall of the model tank; the air pressure tank is connected to the motor; one end of the air compression pipe A is connected to the air pressure tank, and the other end is connected to the air compression bin A; one end of the air compression pipe B is connected to the air pressure tank, and the other end is connected to the air compression bin B; the air compression plate A is slidably connected in the air compression bin A; the air compression plate B is slidably connected in the air compression bin B.

[0011] Preferably, the damping wave-absorbing device includes a flexible baffle and a damping rod; the damping rod is connected to the right side wall of the model groove; the flexible baffle is connected to the damping rod, and the front and rear ends of the flexible baffle are connected to the front and rear side walls of the model groove.

[0012] The utility model has the following beneficial effects:

[0013] Since the utility model is provided with a longitudinal actuating arm and a transverse actuating arm, the vibration table can generate longitudinal and transverse excitations, thereby solving the problem of unidirectional excitation of the vibration table and forming a vibration table device with two-directional excitations. The utility model can simulate the effect of non-uniform earthquake excitation on the structure, and an air compression wave-making device is provided, which can better realize the influence of wave loads on the structure. The utility model has a simple structure and is easy to manufacture and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a structural schematic diagram of a vibration table device under the action of wave force in the utility model.

[0015] Figure 2 It is a top view of the combination of the hollow pressure wave-making device and the damping wave-absorbing device of the utility model.

[0016] Figure 3 It is a cross-sectional view of the combination of the hollow pressure wave-making device and the damping wave-absorbing device of the utility model.

[0017] Figure 4 It is a structural diagram of the reaction frame in the utility model.

[0018] Figure 5 It is a structural diagram of the longitudinal actuating arm in the utility model.

[0019] Figure 6 It is a structural diagram of the transverse actuating arm in the utility model.

[0020] The following are: 1. Reaction frame; 11. Reaction base; 12. Column; 121. Longitudinal slide rail; 13. Ring beam;

[0021] 2. Load-bearing base; 21. Horizontal slide rail;

[0022] 3. Actuating mechanism; 31. Longitudinal actuating arm; 311. Transverse slide; 312. Longitudinal connecting ring; 313. Longitudinal oil cylinder; 314. Longitudinal piston rod; 315. Connecting platform;

[0023] 32. Transverse actuator arm; 321. Longitudinal slide; 322. Transverse cylinder; 323. Transverse piston rod; 324. Transverse connecting ring; 325. Fixed plate;

[0024] 33. Vibration table;

[0025] 4. Wave-making mechanism; 41. Model tank;

[0026] 42. Air-compressed wave generator; 421. Air chamber; 422. Air-compressed chamber A; 423. Air-compressed chamber B; 424. Motor; 425. Air pressure tank; 426. Air-compressed pipe A; 427. Air-compressed pipe B; 428. Air-compressed plate A; 429. Air-compressed plate B;

[0027] 43. Damping wave-absorbing device; 431. Flexible baffle; 432. Damping rod. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0029] like Figures 1 to 6As shown, a vibration table device subjected to wave force includes a reaction frame 1, a bearing base 2, an actuating mechanism 3 and a wave-making mechanism 4.

[0030] The reaction frame 1 includes a reaction base 11, columns 12 and a ring beam 13. The reaction frame 1 provides a support reaction force for the vibration table device.

[0031] The reaction base 11 is bolted to the ground and is used to support the columns 12. There are four reaction bases 11. The columns 12 are vertically arranged on the left and right sides of the reaction base 11 and connected to the four columns 12. They are arranged on the front, back, left and right sides of the support base 2 to enhance the stability of the entire device. The columns 12 on the left and right sides are equipped with longitudinal slide rails 121 on the opposite sides. The ring beam 13 is rectangular and connected to the middle of the four columns 12. This arrangement not only improves the integrity of the reaction frame 1 and makes it more stable, but also minimizes the impact of the frame mass on the vibration table 33 test, preventing the vibration table 33 from offsetting in the non-excitation direction and losing seismic energy.

[0032] The bearing base 2 is fixedly connected to the ground to ensure the stability of the vibration table 33 when the actuating mechanism 3 is working; a transverse slide rail 21 is provided on the bearing base 2.

[0033] The actuating mechanism 3 includes a longitudinal actuating arm 31 , a transverse actuating arm 32 and a vibration table 33 .

[0034] The longitudinal actuating arms 31 are connected to the top of the supporting base 2 in a sliding manner. There are six longitudinal actuating arms 31. These arms 31 include a transverse slide 311, a longitudinal connecting ring 312, a longitudinal cylinder 313, a longitudinal piston rod 314, and a connecting support 315. The transverse slide 311 is slidably connected to the transverse rail 21, ensuring the transverse movement of the longitudinal actuating arm 311. The longitudinal connecting ring 312 is connected to the transverse slide 311 via fixing bolts. The longitudinal cylinder 313 is connected to the longitudinal connecting ring 312, and the longitudinal cylinder 313 is connected to the transverse slide 311 via the longitudinal connecting ring 312 and fixing bolts. The longitudinal piston rod 314 is telescopically connected to the longitudinal cylinder 313. The longitudinal piston rod 314 and the longitudinal cylinder 313 form a telescopic device, providing the vertical vibration effect required for the test while also providing sufficient support force. The telescopic frequency and range are consistent with the longitudinal excitation frequency and amplitude. The connecting support 315 is hinged to the longitudinal piston rod 314 and connected to the vibration table 33.

[0035] The transverse actuating arm 32 is connected to the column 12 in a longitudinal sliding manner. There are two transverse actuating arms 32 symmetrically distributed on both sides of the vibration table 33. The two transverse actuating arms 32 operate in coordination. The transverse actuating arm 32 includes a longitudinal slide 321, a transverse cylinder 322, a transverse piston rod 323, a transverse connecting ring 324 and a fixing plate 325. The longitudinal slide 321 is slidably connected to the longitudinal slide rail 121 to ensure the vertical movement of the transverse actuating arm 32. The transverse cylinder 322 is horizontally arranged and fixedly connected to the longitudinal slide 321. The transverse piston rod 32 The telescopic arm 32 is connected to the transverse oil cylinder 322. The transverse piston rod 323 and the transverse oil cylinder 322 form a telescopic device to generate transverse seismic excitation. The telescopic frequency and range are consistent with the transverse excitation frequency and amplitude, and excitation is performed according to the actual seismic frequency. The transverse connecting ring 324 is connected to the transverse piston rod 323. The fixing plate 325 is connected to the transverse connecting ring 324 by fixing bolts. The fixing plate 325 is also connected to the transverse connecting ring 324 by fixing bolts to the vibration table 33. The transverse actuating arm 32 meets the excitation frequency required for transverse vibration.

[0036] The vibration table 33 is located above the longitudinal actuating arms 31 and is connected to the six longitudinal actuating arms 31 and the two transverse actuating arms 32 . The longitudinal actuating arms 31 provide longitudinal seismic excitation for the vibration table 33 .

[0037] The wave-generating mechanism 4 includes a mold tank 41 , an air-compression wave-generating device 42 and a damping wave-absorbing device 43 .

[0038] The model tank 41 is connected above the vibration table 33. The model tank 41 can be replaced according to the structural design requirements. The operation is simple and convenient, and various sizes can be prefabricated to meet the test requirements.

[0039] The air compression wave-making device 42 is connected to the inner wall on the left side of the model tank 41 and is used to generate wave loads. The air compression wave-making device 42 includes an air bin 421, an air compression bin A422, an air compression bin B423 and several air compression push units, preferably five air compression push units; each air compression push unit includes a motor 424, an air pressure tank 425, an air compression pipe A426, an air compression pipe B427, an air compression plate A428, and an air compression plate B429; the air bin 421 is located on the leftmost side of the model tank 41, and the bottom of its right side wall is connected to the bottom wall of the model tank 41; the air compression bin A422 is located on the right side of the air bin 421, and the bottom of its right side wall is higher than the bottom wall of the model tank 41; the air compression bin B423 is located on the right side of the air compression bin A422. The bottom of the right side wall is higher than the bottom wall of the model tank 41; the motor 424 is located in the air chamber 421 and is connected to the left side wall of the model tank 41; the air pressure tank 425 is connected to the motor 424, and one air pressure tank 425 is connected to two motors 424, and the motor 424 compresses the air inside the air pressure tank 425; one end of the air pressure pipe A426 is connected to the air pressure tank 425, and the other end is sealed with the air pressure chamber A422; one end of the air pressure pipe B427 is connected to the air pressure tank 425, and the other end is sealed with the air pressure chamber B423; the air pressure pipe A426 and the air pressure pipe B427 are connected to the same air pressure tank 425. The air pressure plate A428 is slidably connected to the air pressure chamber A422; the air pressure plate B429 is slidably connected to the air pressure chamber B423, and the waves are generated by alternately compressing the air to push the air pressure plates. The pneumatic wave generator 42 compresses the air in air compressor chambers A422 and B423, alternating between air compressor plates A428 and B429. The wave size is adjusted by the intensity of the air pressure, and the wave frequency is controlled by the alternating speed of air compressor plates A428 and B429. The generated wave load can coordinate the excitation frequency, combining longitudinal and transverse excitation effects to simulate the impact of wave loads on the structure under non-uniform earthquake excitation.

[0040] The damping wave-absorbing device 43 is connected to the right inner wall of the model tank 41 and is used to eliminate wave emission. The damping wave-absorbing device 43 includes a flexible baffle 431 and a damping rod 432; the damping rod 432 is connected to the right side wall of the model tank 41; the flexible baffle 431 is connected to the damping rod 432 and is a wavy plate. The front and rear ends of the flexible baffle 431 are connected to the front and rear side walls of the model tank 41, and there is a gap between the bottom and the model tank 41. The waves generated from the air compression chamber will generate uneven forces after transmission, causing the flexible baffle 431 to partially deform and push the damping rod 432 to offset the wave force and then restore. The damping wave-absorbing device 43 can avoid the boundary effect of the wave load in the model tank 41, reduce the wave reflection effect, and reduce the impact on the experimental results.

[0041] The method of using this device includes the following steps:

[0042] The first step is to check the sealing of the mold tank 41 and the pneumatic wave generator 42.

[0043] The second step is to fill the model tank 41 with water: the water meets the design requirements, and the particularities of the water environment such as water quality, temperature, pressure, etc. are controlled and then left to stand for a period of time to ensure the stability of the test environment.

[0044] The third step is to apply non-uniform excitation in two directions: according to the seismic response factors, the longitudinal actuator arm 31 is started to apply excitation at multiple points on the bottom of the vibration table 33. While the frequency and amplitude of the six longitudinal piston rods 314 are stable, the transverse actuator arm 32 is started to apply transverse excitation.

[0045] The fourth step is to apply wave force: while the vibration table 33 is operating, start the motor 424 to compress the air in the air pressure tank 425, and alternately push the air pressure plate A428 and the air pressure plate B429 through the air pressure pipe A426 and the air pressure pipe B427, thereby generating waves of corresponding amplitude and frequency.

[0046] This device uses non-uniform excitation input, meaning it applies inconsistent excitation to different directions of the object under study. Specifically, different frequencies and vibration excitations are applied to the longitudinal and transverse actuator arms 31 and 32, depending on the earthquake's distance and depth, as well as the attenuation of different seismic waves, resulting in more accurate simulations. Furthermore, the effects of wave loads are reduced by using a pneumatic wave generator 42 and a damping wave absorber 43. This optimizes the independence of the vibration table 33's motion and the relationship between related rows, reducing the experimental error model and achieving an ideal response.

[0047] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A vibration table device for wave force, characterized in that: It comprises a reaction force frame (1), a bearing base (2), an actuating mechanism (3) and a wave-making mechanism (4); The reaction frame (1) includes a reaction base (11) and a column (12); The reaction base (11) is connected to the ground; The upright posts (12) are vertically arranged on the left and right sides and connected to the reaction base (11); The bearing base (2) is connected to the ground; The actuating mechanism (3) includes a longitudinal actuating arm (31), a transverse actuating arm (32) and a vibration table (33); The longitudinal actuating arm (31) is connected to the bearing base (2) in a lateral sliding manner; The transverse actuating arm (32) is connected to the column (12) in a longitudinal sliding manner; The vibration table (33) is located above the longitudinal actuating arm (31) and is connected to the longitudinal actuating arm (31) and the transverse actuating arm (32); The wave-making mechanism (4) comprises a model tank (41), an air-compression wave-making device (42) and a damping wave-absorbing device (43); The model tank (41) is connected above the vibration table (33); The air compression wave-making device (42) is connected to the left inner wall of the model tank (41); The damping wave absorbing device (43) is connected to the right inner wall of the mold tank (41).

2. The wave-force vibration table device according to claim 1, characterized in that: The reaction frame (1) further comprises a ring beam (13), four columns (12) are arranged on the front, back, left and right sides of the bearing base (2), the reaction base (11) is connected to the ground through bolts, and the ring beam (13) is rectangular and connected to the middle position of the four columns (12).

3. The vibration table device for wave force according to claim 1, characterized in that: The left and right upright posts (12) are both provided with longitudinal slide rails (121) on the opposite sides thereof. The transverse actuating arm (32) includes a longitudinal slide seat (321) which is slidably connected to the longitudinal slide rails (121). A transverse slide rail (21) is provided on the bearing base (2), and the longitudinal actuating arm (31) includes a transverse slide seat (311), which is slidably connected to the transverse slide rail (21).

4. The wave-force vibration table device according to claim 3, characterized in that: The transverse actuating arm (32) includes a transverse oil cylinder (322), a transverse piston rod (323), a transverse connecting ring (324) and a fixing plate (325); The transverse oil cylinder (322) is horizontally arranged and connected to the longitudinal slide (321); The transverse piston rod (323) is telescopically connected to the transverse oil cylinder (322); The transverse connecting ring (324) is connected to the transverse piston rod (323); The fixing plate (325) is connected to the transverse connecting ring (324) via fixing bolts, and the fixing plate (325) is connected to the vibration table (33).

5. The wave-force-acting vibration table device according to claim 3, characterized in that: The longitudinal actuating arm (31) comprises a longitudinal connecting ring (312), a longitudinal oil cylinder (313), a longitudinal piston rod (314) and a connecting support (315); The longitudinal connecting ring (312) is connected to the transverse sliding seat (311) via fixing bolts; The longitudinal oil cylinder (313) is connected to the longitudinal connecting ring (312); The longitudinal piston rod (314) is telescopically connected to the longitudinal oil cylinder (313); The connecting support (315) is hinged to the longitudinal piston rod (314) and connected to the vibration table (33).

6. The vibration table device for wave force according to claim 1, characterized in that: The air compression wave-making device (42) includes an air chamber (421), an air compression chamber A (422), an air compression chamber B (423), and a plurality of air compression driving units; each air compression driving unit includes a motor (424), an air pressure tank (425), an air compression pipe A (426), an air compression pipe B (427), an air compression plate A (428), and an air compression plate B (429); The air chamber (421) is located at the leftmost side of the mold groove (41), and the bottom of the right side wall thereof is connected to the bottom wall of the mold groove (41); The air compression chamber A (422) is located on the right side of the air chamber (421), and the bottom of its right side wall is higher than the bottom wall of the mold tank (41); The air compression chamber B (423) is located on the right side of the air compression chamber A (422), and the bottom of its right side wall is higher than the bottom wall of the mold groove (41); The motor (424) is located in the air chamber (421) and is connected to the left side wall of the mold tank (41); The air pressure tank (425) is connected to the motor (424); One end of the air pressure pipe A (426) is connected to the air pressure tank (425), and the other end is connected to the air pressure chamber A (422); One end of the air pressure pipe B (427) is connected to the air pressure tank (425), and the other end is connected to the air pressure chamber B (423); The air compression plate A (428) is slidably connected to the air compression chamber A (422); The air compression plate B (429) is slidably connected in the air compression chamber B (423).

7. The wave-force vibrating table device according to claim 1, characterized in that: The damping wave absorbing device (43) comprises a flexible baffle (431) and a damping rod (432); The damping rod (432) is connected to the right side wall of the mold groove (41); The flexible baffle (431) is connected to the damping rod (432), and the front and rear ends of the flexible baffle (431) are connected to the front and rear side walls of the mold groove (41).

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