A seabed slope shaking table test system for simulating the action of ocean waves

Abstract

A seabed slope shaking table test system for simulating ocean wave action includes a rigid model box, a wave-generating equipment support, an integrated lifting wave device, and an end wave-damping device. The rigid model box is connected to the shaking table platform at its bottom. The wave-generating equipment support is fixed to the side wall of the rigid model box, supporting the integrated lifting wave device and adjusting its height. The integrated lifting wave device is used for wave simulation and reflected wave elimination. The end wave-damping device is fixed to the side wall of the rigid model box, opposite the integrated lifting wave device, and is used for end wave damping. This invention simulates earthquakes on the shaking table while simultaneously loading waves, unifying the effects of overlying seawater, waves, and earthquakes. This allows for a more realistic simulation of multi-dynamic coupling instability of seabed slopes in complex marine environments. Furthermore, the wave parameters and the water depth of the wave-generating equipment are flexibly adjustable, facilitating a wider range of experimental parameters for seabed slopes.

Description

Technical Field

[0001] This invention relates to the field of marine geological disaster prevention and mitigation technology, and in particular to a seabed slope test system suitable for simulating ocean wave loading on a large shaking table. Background Technology

[0002] Submarine landslides are often massive in scale and have significant destructive effects. Research on the instability and flow mechanisms of submarine slopes is of great indicative significance for future marine engineering activities to avoid such marine geological hazards. Because numerical simulations struggle to describe the loose characteristics of seabed sediments, and field investigations are expensive and technically demanding, model testing has gradually become the primary simulation method for submarine landslides in recent years.

[0003] In natural marine environments, the effect of overlying seawater on slopes cannot be ignored. The combined effects of wave-induced water dynamic pressure and seismic forces must be considered, resulting in complex operating conditions. Earthquake simulation shaking tables or other single-condition simulation test platforms are insufficient to accurately reflect the true response of slopes under marine conditions. Currently available test platforms support a limited range of disaster simulations, primarily including underwater shaking tables and combined wind and wave simulation tanks. While these platforms can simulate underwater earthquakes or wind and waves and reproduce engineering phenomena under deep-sea hydrodynamic forces, they cannot integrate the simulation of combined wave and seismic effects in shaking table tests. Existing multi-dynamic coupling simulation platforms for the ocean struggle to reproduce the complex real-world marine dynamic environment and meet testing requirements. Summary of the Invention

[0004] In view of the problems existing in the prior art, this invention proposes a seabed slope shaking table test system for simulating ocean wave action. This system simulates earthquakes on the shaking table while simultaneously loading waves, overcoming the shortcomings of existing coupled simulation test platforms for marine environments. It provides technical support for the analysis of the entire process of seabed landslide instability and flow in marine geological disaster prevention and mitigation, and studies the deformation and instability failure mechanisms of seabed slopes in real marine environments.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A seabed slope shaking table test system for simulating ocean wave action includes a rigid model box 1, a wave-generating equipment support 2, an integrated wave-lifting device 3, and an end wave-damping device 4, wherein:

[0007] The bottom of the rigid model box 1 is connected to the vibration table surface.

[0008] The wave-generating equipment bracket 2 is fixed to the side wall of the left end of the rigid model box 1, and is used to support the integrated lifting wave device 3 and adjust its height.

[0009] The integrated lifting wave device 3 is installed in the rigid model box 1 through the wave-generating equipment bracket 2, and is used to realize wave simulation and reflection wave elimination;

[0010] The end wave-damping device 4 is fixed on the side wall of the right end of the rigid model box 1, opposite to the integrated lifting wave device 3, and is used to achieve end wave damping.

[0011] Furthermore, the rigid model box 1 is a semi-enclosed box containing a bottom plate and four side walls, and the inside of the box is filled with water and equipped with a seabed slope model.

[0012] Preferably, the bottom of the rigid model box 1 is provided with a steel strip 12, which is fixed to the vibration table surface by expansion screws 121.

[0013] Furthermore, the wave-generating device support 2 includes:

[0014] Three card slots 21 are respectively set on the top of the three side walls on the left end of the rigid model box 1;

[0015] Three vertical support plates 22 are welded to the upper surfaces of three card seats 21 respectively; a sliding groove 223 is provided in the center of the vertical support plate 22, a threaded rod 221 is installed inside the sliding groove, and a manual wheel 222 is installed at the top of the sliding groove. The manual wheel 222 is connected to the threaded rod 221, and the threaded rod 221 is rotated by operating the manual wheel 222.

[0016] And a reinforcing steel pipe 23 is welded between the bracket 21 and the vertical support plate 22 on the left side wall to provide horizontal support for the vertical support plate 22.

[0017] Furthermore, the integrated lifting wave device 3 includes a lifting assembly, a robotic arm drive assembly, a wave-generating rocker assembly, and a wave-damping assembly, wherein:

[0018] The lifting assembly includes a load-bearing platform 32 and a lifting frame 31. The load-bearing platform 32 is used to support the robotic arm drive assembly. Three sliders 321 are welded to the edge of the load-bearing platform 32. The three sliders 321 are provided with through holes with internal threads. Through the through holes, they are threadedly connected to the threaded rods 221 inside the grooves of the three vertical support plates 22. When the threaded rods 221 rotate under the action of the manual wheel 222, the sliders 321 move up and down with the rotation. That is, the rotation of the threaded rods 221 drives the lifting of the load-bearing platform 32. The lifting frame 31 is connected to the load-bearing platform 32. Both move up and down at the same time, providing a fulcrum for the wave-generating rocker assembly and the wave-damping assembly.

[0019] The robotic arm drive assembly includes a servo motor 33; the servo motor 33 is installed in the center of the load-bearing platform 32, the robotic arm 331 of the servo motor 33 extends horizontally, and the end of the robotic arm 331 is provided with a rolling bearing 332 and a telescopic sleeve 333.

[0020] The wave-generating rocker assembly includes a wave-generating plate 34 and a ball bearing 35.

[0021] The upper part of the telescopic sleeve 333 is hinged to the rolling bearing 332 at the end of the robotic arm 331, and the lower part is welded to the upper part of the wave-making plate 34. The lower part of the wave-making plate 34 is connected to the lifting frame 31 via a ball bearing 35.

[0022] Thus, through the horizontal extension and reciprocating motion of the robotic arm 331, the wave-generating plate 34 is driven to swing back and forth around the ball bearing 35 as the rotation center, striking the water to generate stable waves.

[0023] The wave-damping assembly includes a lifting upper top plate 361, a lifting lower bottom plate 362, and a multi-layer lifting wave-damping grid 37. The lifting upper top plate 361 and the lifting lower bottom plate 362 are connected to the lifting frame 31, and the multi-layer lifting wave-damping grid 37 is embedded between the lifting upper top plate 361 and the lifting lower bottom plate 362. The lifting wave-damping grid 37 has a number of round holes, and the round holes are staggered among the multi-layer lifting wave-damping grids.

[0024] Furthermore, the end wave-damping device 4 includes a wave-damping frame 41, a crossbeam 42, and a multi-layer fixed wave-damping grid 43, wherein:

[0025] The wave-damping frame 41 is provided with an upper top plate 411 and a lower bottom plate 412, and the wave-damping grid 43 is embedded between the upper top plate 411 and the lower bottom plate 412.

[0026] The fixed wave-damping grid 43 has numerous circular holes, and the circular holes are staggered among the multiple layers of fixed wave-damping grids.

[0027] The crossbeam 42 is connected to the top of the wave-damping frame 41, and its length is greater than the width of the rigid model box.

[0028] The end wave-damping device 4 is mounted on one side of the rigid model box 1 via a crossbeam 42, opposite to the integrated lifting wave device 3, to eliminate waves propagating from the opposite side.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] This invention overcomes the shortcomings of single-dynamic simulation platforms for seabed slopes in the field of marine geological disasters by designing an experimental system suitable for simulating seismic action and applying wave loads simultaneously on a large shaking table. It integrates the overlying seawater, wave action, and seismic action, enabling more realistic simulation of multi-dynamic coupling instability of seabed slopes in complex marine environments. Furthermore, the wave parameters and the water depth of the wave-generating equipment are flexibly adjustable, facilitating a wider range of experimental parameters for seabed slopes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the seabed slope shaking table test system for simulating ocean wave action according to the present invention;

[0032] Figure 2 This is a schematic diagram of the connection device between the rigid model box and the shaking table surface of the seabed slope shaking table test system for simulating ocean wave action according to the present invention.

[0033] Figure 3 This is a schematic diagram of the wave-generating equipment support of the seabed slope shaking table test system for simulating ocean wave action according to the present invention.

[0034] Figure 4 This is a schematic diagram of the integrated lifting wave device of the seabed slope shaking table test system for simulating ocean wave action according to the present invention.

[0035] Figure 5 This is a front view of the integrated lifting wave device of the seabed slope shaking table test system for simulating ocean wave action according to the present invention.

[0036] Figure 6 This is a schematic diagram of the end wave-damping device of the seabed slope shaking table test system for simulating ocean wave action according to the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Rigid model box; 11. Transparent acrylic sheet; 12. Steel strip; 121. Expansion bolt; 13. Seabed slope model.

[0039] 2. Wave-making equipment bracket, 21. Card holder, 22. Vertical support plate, 221. Threaded rod, 222. Manual wheel, 223. Slide groove, 23. Reinforcing steel pipe;

[0040] 3 Integrated lifting wave device, 31 Lifting frame, 32 Load-bearing platform, 321 Slider, 33 Servo motor, 331 Robotic arm, 332 Rolling bearing, 333 Telescopic sleeve, 34 Wave-making plate, 35 Ball bearing, 361 Lifting upper top plate, 362 Lifting lower top plate, 37 Lifting wave-damping grid.

[0041] 4. End wave-damping device, 41. Wave-damping frame, 411. Top plate, 412. Bottom plate, 42. Crossbeam, 43. Fixed wave-damping grid. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] like Figure 1As shown, a seabed slope shaking table test system simulating ocean wave action includes a rigid model box 1, a wave-generating equipment support 2, an integrated wave-lifting device 3, and an end wave-damping device 4, wherein:

[0044] The bottom of the rigid model box 1 is connected to the vibration table surface.

[0045] The wave-generating equipment bracket 2 is fixed to the side wall of the left end of the rigid model box 1, and is used to support the integrated lifting wave device 3 and adjust its height.

[0046] The integrated lifting wave device 3 is installed in the rigid model box 1 through the wave-generating equipment bracket 2, and is used to realize wave simulation and reflection wave elimination;

[0047] The end wave-damping device 4 is fixed on the side wall of the right end of the rigid model box 1, opposite to the integrated lifting wave device 3, and is used to achieve end wave damping.

[0048] Furthermore, the rigid model box 1 is a semi-enclosed box containing a bottom plate and four side walls. The box is filled with water and has a seabed slope model 13. In this embodiment, the front and rear side walls of the rigid model box 1 are made of high-strength transparent acrylic sheets 11 to facilitate observation of the test process; the bottom of the box is provided with steel strips 12, which are fixed to the vibration table surface by expansion screws 121.

[0049] Furthermore, the larger the size of the rigid model box, the more realistic the underwater slope instability and flow effect can be obtained. In this embodiment, considering the range of existing large shaking table sizes in China, the length of the model box is not less than 4m, the width is not less than 1m, and the depth is not less than 2m. The rigid model box has a frame constructed of rectangular steel pipes, with the bottom plate and left and right side walls made of steel plates welded to the frame constructed of rectangular steel pipes; the front and rear side walls are made of high-strength transparent acrylic sheets 11, which are nailed to the rectangular steel pipes with sealing strips to achieve a waterproof and leak-proof effect, while the transparency of the front and rear side walls facilitates observation of the underwater slope.

[0050] like Figure 2 As shown, multiple steel strips 12 form an array base. The two ends of the steel strips 12 are tightly connected to the large vibration table surface by expansion bolts 121 to prevent loosening caused by vibration of the vibration table surface or external force.

[0051] like Figure 3 As shown, the wave-generating equipment bracket 2 includes:

[0052] Three card slots 21 are respectively set on the top of the three side walls on the left end of the rigid model box 1;

[0053] Three vertical support plates 22 are welded to the upper surfaces of three card seats 21 respectively; a sliding groove 223 is provided in the center of the vertical support plate 22, a threaded rod 221 is installed inside the sliding groove, and a manual wheel 222 is installed at the top of the sliding groove. The manual wheel 222 is connected to the threaded rod 221, and the threaded rod 221 is rotated by operating the manual wheel 222.

[0054] And a reinforcing steel pipe 23 is welded between the bracket 21 and the vertical support plate 22 on the left side wall to provide horizontal support for the vertical support plate 22.

[0055] like Figure 4 , Figure 5 As shown, the integrated lifting wave device 3 can be raised and lowered within the tank, generating waves in the water within the model tank while simultaneously eliminating wave reflections from the wall. It includes a lifting assembly, a robotic arm drive assembly, a wave-generating rocking plate assembly, and a wave-damping assembly, wherein:

[0056] The lifting assembly includes a load-bearing platform 32 and a lifting frame 31. The load-bearing platform 32 is used to support the robotic arm drive assembly. Three sliders 321 are welded to the edge of the load-bearing platform 32. The three sliders 321 are provided with through holes with internal threads. Through these through holes, they are threadedly connected to the threaded rods 221 inside the grooves of the three vertical support plates 22, and can be locked by a latch (not shown in the figure). When the threaded rods 221 rotate under the action of the manual wheel 222, the sliders 321 move up and down with the rotation, that is, the rotation of the threaded rods 221 drives the lifting of the load-bearing platform 32. The lifting frame 31 is connected to the load-bearing platform 32. Both move up and down at the same time, providing a fulcrum for the wave-generating rocker assembly and the wave-damping assembly.

[0057] The robotic arm drive assembly includes a servo motor 33; the servo motor 33 is installed in the center of the load-bearing platform 32, the robotic arm 331 of the servo motor 33 extends horizontally, and the end of the robotic arm 331 is provided with a rolling bearing 332 and a telescopic sleeve 333.

[0058] The wave-generating rocker assembly includes a wave-generating plate 34 and a ball bearing 35.

[0059] The upper part of the telescopic sleeve 333 is hinged to the rolling bearing 332 at the end of the robotic arm 331, and the lower part is welded to the upper part of the wave-making plate 34. The lower part of the wave-making plate 34 is connected to the lifting frame 31 via a ball bearing 35.

[0060] Thus, through the horizontal extension and reciprocating motion of the robotic arm 331, the wave-generating plate 34 is driven to swing back and forth around the ball bearing 35 as the rotation center, striking the water to generate stable waves.

[0061] The wave-damping assembly includes a lifting upper plate 361, a lifting lower plate 362, and a multi-layer lifting wave-damping grid 37. The lifting upper plate 361 and the lifting lower plate 362 are connected to the lifting frame 31, and the multi-layer lifting wave-damping grid 37 is embedded between the lifting upper plate 361 and the lifting lower plate 362. The lifting wave-damping grid 37 has a number of round holes. The round holes of the lifting wave-damping grid 37 closer to the wave-generating plate 34 have larger diameters, and the round holes of the lifting wave-damping grid 37 further away from the wave-generating plate 34 gradually decrease in diameter. The round holes of the multi-layer lifting wave-damping grid are staggered.

[0062] like Figure 6 As shown, the end wave-damping device 4 includes a wave-damping frame 41, a crossbeam 42, and a multi-layer fixed wave-damping grid 43, wherein:

[0063] The wave-damping frame 41 is provided with an upper top plate 411 and a lower bottom plate 412, and the wave-damping grid 43 is embedded between the upper top plate 411 and the lower bottom plate 412.

[0064] The fixed wave-damping grid 43 has numerous circular holes, and the circular holes are staggered among the multiple layers of fixed wave-damping grids 43.

[0065] The crossbeam 42 is connected to the top of the wave-damping frame 41, and its length is greater than the width of the rigid model box.

[0066] The end wave-damping device 4 is mounted on one side of the rigid model box 1 via a crossbeam 42, opposite to the integrated lifting wave device 3, to eliminate waves propagating from the opposite side.

[0067] Preferably, grooves can be provided on the lower surface of the upper top plate 411 and the upper surface of the lower bottom plate 412, and the wave-damping grid 43 can be embedded between the upper top plate 411 and the lower bottom plate 412 through the grooves.

[0068] Based on the above system, wave-induced instability flow tests on seabed slopes can be conducted on a shaking table. The test includes the following steps:

[0069] S1 prepares a seabed slope sample at the end of the rigid model box 1 and fills it with water to the target depth to form a simulated seabed environment;

[0070] S2 designs the wave parameters (wave height, wavelength, period, etc.) required for the experiment based on the calculation principle of wave similarity. By rotating the manual wheel 222, the integrated lifting wave device 3 is immersed in the water to an appropriate depth.

[0071] S3 simulates different wave cycles and wave heights by adjusting the speed of the servo motor 33 and the maximum stroke of the robotic arm 331; after the waves stabilize, a marine hydrodynamic environment is formed.

[0072] The S4 input allows for the simulation of earthquakes on the shaking table while simultaneously achieving wave loading test effects.

[0073] The above description is merely a description of preferred embodiments of this application and is not intended to limit the scope of this application in any way. Any changes or modifications made by those skilled in the art based on the above-disclosed technical content should be considered as equivalent and valid embodiments and fall within the scope of protection of the technical solution of this application.

Claims

1. A system for a shaking table test of a submarine slope simulating the action of ocean waves, characterized by, Includes a rigid model box (1), a wave-generating equipment support (2), an integrated lifting wave device (3), and an end wave-damping device (4), wherein: The bottom of the rigid model box (1) is connected to the vibration table surface; The wave-generating equipment bracket (2) is fixed on the side wall of the left end of the rigid model box (1) to support the integrated lifting wave device (3) and adjust its height. The integrated lifting wave device (3) is installed in the rigid model box (1) through the wave-generating equipment bracket (2) to realize wave simulation and reflection wave elimination; The end wave-damping device (4) is fixed on the side wall of the right end of the rigid model box (1), opposite to the integrated lifting wave device (3), and is used to achieve end wave damping; The wave-generating equipment support (2) includes: Three card holders (21) are respectively set on the top of the three side walls on the left side of the rigid model box (1); Three vertical support plates (22) are welded to the upper surfaces of three card holders (21); a sliding groove (223) is provided in the center of the vertical support plate (22), a threaded rod (221) is installed inside the sliding groove, and a manual wheel (222) is installed at the top of the sliding groove. The manual wheel (222) is connected to the threaded rod (221), and the threaded rod (221) is rotated by operating the manual wheel (222); And a reinforcing steel pipe (23) is welded between the bracket (21) on the left side wall and the vertical support plate (22) to provide horizontal support for the vertical support plate (22); The integrated lifting wave device (3) includes a lifting assembly, a robotic arm drive assembly, a wave-generating rocker assembly, and a wave-damping assembly, wherein: The lifting assembly includes a load-bearing platform (32) and a lifting frame (31). The load-bearing platform (32) is used to support the robotic arm drive assembly. Three sliders (321) are welded to the edge of the load-bearing platform (32). The three sliders (321) are provided with through holes with internal threads. Through the through holes, they are threadedly connected to the threaded rods (221) inside the grooves of the three vertical support plates (22). When the threaded rods (221) rotate under the action of the manual wheel (222), the sliders (321) move up and down with the rotation of the threaded rods (221). That is, the rotation of the threaded rods (221) drives the lifting of the load-bearing platform (32). The lifting frame (31) is connected to the load-bearing platform (32). The two move up and down at the same time, providing a fulcrum for the wave-making rocker assembly and the wave-damping assembly. The robotic arm drive assembly includes a servo motor (33); the servo motor (33) is installed in the center of the load-bearing platform (32), the robotic arm (331) of the servo motor (33) extends horizontally, and the end of the robotic arm (331) is provided with a rolling bearing (332) and a telescopic sleeve (333). The wave-generating rocker assembly includes a wave-generating plate (34) and a ball bearing (35). The upper part of the telescopic sleeve (333) is hinged to the rolling bearing (332) at the end of the robotic arm (331), and the lower part is welded to the upper part of the wave-making plate (34). The lower part of the wave-making plate (34) is connected to the lifting frame (31) via a ball bearing (35). Thus, through the horizontal extension and reciprocating motion of the robotic arm (331), the wave-generating plate (34) is driven to swing back and forth around the ball bearing (35) as the rotation center, striking the water to generate stable waves; The wave-damping assembly includes a lifting upper top plate (361), a lifting lower bottom plate (362), and a multi-layer lifting wave-damping grid (37). The lifting upper top plate (361) and the lifting lower bottom plate (362) overlap on the lifting frame (31), and the multi-layer lifting wave-damping grid (37) is embedded between the lifting upper top plate (361) and the lifting lower bottom plate (362). The lifting wave-damping grid (37) has a number of round holes, and the round holes are staggered among the multi-layer lifting wave-damping grids. The end wave-damping device (4) includes a wave-damping frame (41), a crossbeam (42), and a multi-layer fixed wave-damping grid (43), wherein: The wave-damping frame (41) is provided with an upper top plate (411) and a lower bottom plate (412), and the fixed wave-damping grid (43) is embedded between the upper top plate (411) and the lower bottom plate (412); The fixed wave-damping grid (43) has numerous circular holes, and the circular holes are staggered among the multiple layers of fixed wave-damping grids; The crossbeam (42) is connected to the top of the wave-damping frame (41), and its length is greater than the width of the rigid model box. The end wave-damping device (4) is mounted on one side of the rigid model box (1) via a crossbeam (42), opposite to the integrated lifting wave device (3), to eliminate waves propagating from the opposite side.

2. The shaking table test system of claim 1, wherein, The rigid model box (1) has a steel strip (12) at the bottom, which is fixed to the vibration table surface by expansion screws (121).

Images