A centrifuge simulation system for simulating the destruction of a submarine slope by wave action

Abstract

The application discloses a kind of simulation system of submarine slope destruction centrifugal simulation of wave-current interaction, and simulation system includes two-chamber centrifugal model box and high-speed camera system;Wherein two-chamber centrifugal model box includes the wave environment simulation chamber with transparent organic glass on one side and two-way circulation sea current simulation chamber, and high-speed camera system is through transparent organic glass observation capture submarine slope deformation instability breakage whole process image.Wave environment simulation chamber includes artificial submarine slope model tank, wave making module and wave absorbing module;Two-way circulation sea current simulation chamber includes circulating current pump, gate valve, flowmeter and grating plate.The application can realize single wave making, single current making and wave-current making simultaneously by setting wave making module, wave absorbing module and two-way circulation current making, to realize submarine slope deformation and instability destruction engineering problem simulation under wave-current coupling effect under real gravity level, more in line with actual working condition, simple structure, easy to popularize.

Description

Technical Field

[0001] This invention relates to the field of marine geological disaster prevention and mitigation technology, and in particular to a centrifugal simulation system suitable for studying the deformation and instability failure process of seabed slopes under wave-current coupling. Background Technology

[0002] In the natural marine environment, waves often coexist with ocean currents (such as ocean currents, eddies, and tidal currents). The deformation and eventual instability of seabed slopes under wave-current coupling pose a threat to the stability of marine structures. Therefore, conducting research on the deformation and instability failure processes of seabed slopes under wave-current coupling, and elucidating the evolution mechanism of seabed slope instability failure, has important fundamental theoretical and practical significance for marine engineering construction and disaster prevention and mitigation in marine resource development.

[0003] Currently, human exploration of submarine landslides is still in its early stages. Directly collecting on-site data is difficult, and traditional numerical simulation methods struggle to accurately reproduce the parameters of submarine landslide sites. Therefore, physical model experiments are the preferred method for submarine landslide research. However, current research on submarine landslides mainly relies on indoor flume model tests, which cannot realistically simulate the actual gravity field and related actual dimensions, thus limiting research on submarine slope instability and failure. Existing experimental devices and methods for studying the instability and failure process of submarine slopes are very limited, especially the experimental devices and operating methods based on beam-type geocentrifuges, which cannot simultaneously consider the coupling effects of waves and ocean currents. Therefore, considering the complex marine hydrodynamic environment of wave-current coupling, designing a centrifuge simulation system suitable for studying the deformation and instability failure process of submarine slopes under wave-current coupling is essential for the prevention and control of submarine landslide geological hazards. Summary of the Invention

[0004] In view of the problems existing in the above or existing technologies, the present invention proposes a centrifugal simulation system that can realize the study of the deformation and instability failure process of seabed slopes under wave-current coupling.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A centrifuge simulation system for simulating the effects of waves and currents on a seabed slope includes a two-chamber centrifuge model chamber and a high-speed camera system. The two-chamber centrifuge model chamber comprises a wave environment simulation chamber with a transparent acrylic glass panel on one side and a bidirectional circulating current simulation chamber. The high-speed camera system is positioned in front of the transparent acrylic glass panel of the wave environment simulation chamber, capturing images of the entire process of seabed slope deformation, instability, and failure through the transparent acrylic glass.

[0007] Preferably, the wave environment simulation chamber includes an artificial seabed slope model tank, a wave-generating module, and a wave-dissipating module. The artificial seabed slope model tank is located at the lower center of the wave environment simulation chamber; the wave-generating module and the wave-dissipating module are arranged opposite each other, with the wave-generating module located on the upper part of one side of the wave environment simulation chamber and the wave-dissipating module located on the upper part of the other side of the wave environment simulation chamber.

[0008] The artificial seabed slope model tank includes an artificial seabed slope, a pore pressure sensor, and a support frame that keeps the pore pressure sensor in a fixed position. The artificial seabed slope model tank has an array of insertion holes inside, which are used to insert the support frame, and the pore pressure sensor is mounted on the support frame.

[0009] The wave-generating module includes a servo motor, a transmission rod, a wave-generating plate, gear I, gear II, a frame, a guide rail, and a slider. The servo motor is fixed on the side wall of the bidirectional circulating ocean current simulation chamber in the two-chamber centrifugal model box. The transmission rod is connected to the output shaft of the servo motor. Gear I is located at the front end of the transmission rod, and gear II is located on the wave-generating plate, with gear I and gear II meshing. The slider is located at the top of the wave-generating plate. The frame is fixed at the top of the wave environment simulation chamber, and a slide rail is located in the center of the frame. The slider can move back and forth along the slide rail to drive the wave-generating plate to push the water body to form regular waves. The power is provided by the servo motor fixed on the side wall of the bidirectional circulating ocean current simulation chamber.

[0010] The wave-damping module includes a wave-damping slotted plate and a position adjustment frame. The position adjustment frame is fixed to the inner wall of the wave environment simulation chamber, and the wave-damping slotted plate is embedded in the position adjustment frame via pulleys. Specifically, pulleys are provided at the four corners of the wave-damping slotted plate, and the position adjustment frame is provided with a sliding groove, allowing the wave-damping slotted plate to slide along the sliding groove on the position adjustment frame via the pulleys.

[0011] Preferably, the bidirectional circulating current simulation chamber includes: a circulating current pump I near the wave-generating module and a circulating current pump II near the wave-damping module, a gate valve to control the flow rate, a flow meter to display the flow rate, two circulating current inlets and outlets, and two grid plates installed at the inlets and outlets to trap soil particles entering the bidirectional circulating current simulation chamber. The circulating current pump I and circulating current pump II are connected by a flow pipe, and the gate valve and flow meter are installed in the flow pipe. Both ends of the flow pipe are connected to the two circulating current inlets and outlets, respectively.

[0012] Preferably, the high-speed camera system includes a high-speed camera facing the artificial seabed slope and a lighting lamp that provides a light source.

[0013] The beneficial effects of the present invention: By setting up a wave-generating module, a wave-dissipating module and a bidirectional circulating current-generating module in combination, the present invention can realize working conditions such as independent wave generation, independent current generation and simultaneous wave generation and current generation, filling a technical gap in the field of physical simulation of geological disasters, especially in the field of centrifugal simulation of seabed slopes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the centrifugal simulation system for simulating wave-current effects on the seabed slope;

[0015] Figure 2 This is a schematic diagram of the wave-generating module structure of the centrifugal simulation system for simulating the effects of waves and currents on the seabed slope;

[0016] Figure 3 This is a schematic diagram of the artificial seabed slope model tank of the centrifugal simulation system for simulating the effects of waves and currents on the seabed slope damage according to the present invention.

[0017] Figure 4 This is a schematic diagram of the wave-damping module structure of the centrifugal simulation system for simulating the effects of waves and currents on a seabed slope.

[0018] Figure 5 This is a schematic diagram of the bidirectional circulation current generation module of the centrifugal simulation system for simulating wave-current action on a seabed slope.

[0019] Figure 6 This is a schematic diagram illustrating the application scenario of the centrifugal simulation system for simulating the effects of waves and currents on the seabed slope.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Two-chamber centrifuge model box;

[0022] 100 Wave Environment Simulation Chamber;

[0023] 101 Artificial seabed slope model tank; 101a Seabed slope model, 101b Pore pressure sensor, 101c Support frame, 101d Front baffle, 101e Rear baffle, 101f Socket array;

[0024] 102 wave-generating module, 102a servo motor, 102b transmission rod, 102c wave-generating plate, 102d gear I, 102e gear II, 102f gantry, 102g guide rail, 102h slider;

[0025] 103 wave-damping module, 103a wave-damping slot plate, 103b position adjustment bracket, 103c pulley, 103d slide groove;

[0026] 104 transparent acrylic glass;

[0027] 200 Bidirectional circulating ocean current simulation chamber, 201 Circulating flow pump I, 202 Circulating flow pump II, 203 Gate valve, 204 Flow meter, First circulating ocean current inlet and outlet 205a, Second circulating ocean current inlet and outlet 205b, First grid plate 206a, Second grid plate 206b.

[0028] 3. High-speed camera system; 301. High-speed camera; 302. Illumination lamp;

[0029] 4-beam geotextile centrifuge. Detailed Implementation

[0030] The technical solutions provided in this application will be further described below with reference to specific embodiments and accompanying drawings. The advantages and features of this application will become clearer from the following description.

[0031] It should be noted that the embodiments of this application are preferred for implementation and are not intended to limit the application in any way. The technical features or combinations of technical features described in the embodiments of this application should not be considered isolated; they can be combined with each other to achieve better technical effects. The scope of the preferred embodiments of this application may also include other implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.

[0032] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary embodiments may have different values.

[0033] The accompanying drawings in this application are all in a very simplified form and use non-precise proportions, intended only to facilitate and clarify the illustration of the embodiments of this application, and are not intended to limit the implementation of this application. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes achieved by this application, should fall within the scope of the technical content disclosed in this application. Furthermore, the same reference numerals appearing in the various drawings of this application represent the same features or components, and can be applied to different embodiments.

[0034] like Figure 1As shown, a centrifugal simulation system for simulating the effects of waves and currents on a seabed slope includes a two-chamber centrifugal model chamber 1 and a high-speed camera system 3. The two-chamber centrifugal model chamber 1 comprises a wave environment simulation chamber 100 and a bidirectional circulating current simulation chamber 200, which are connected by a bidirectional circulating current inlet and outlet. The front panel of the wave environment simulation chamber 100 is equipped with transparent plexiglass 104. The high-speed camera system 3 is located at the front of the wave environment simulation chamber, allowing for the observation and capture of the entire process of seabed slope deformation, instability, and failure through the transparent plexiglass.

[0035] Furthermore, the wave environment simulation chamber 100 includes an artificial seabed slope model tank 101, a wave-generating module 102, and a wave-dissipating module 103. The artificial seabed slope model tank 101 is located at the lower center of the wave environment simulation chamber 100 and is used to fill the artificial seabed slope model to simulate the deformation and instability failure process of the seabed slope. The wave-generating module 102 and the wave-dissipating module 103 are arranged opposite to each other. The wave-generating module 102 is located on the upper part of one side of the wave environment simulation chamber 100 and is used to provide waves with different wave heights and periods. The wave-dissipating module 103 is located on the upper part of the other side of the wave environment simulation chamber 100 and is used to eliminate the waves generated by the wave-generating module.

[0036] like Figure 2 As shown, the artificial seabed slope model trough 101 includes a seabed slope model 101a filled inside the model trough, a pore pressure sensor 101b, and a support frame 101c for fixing the position of the pore pressure sensor 101b.

[0037] In this embodiment, the artificial seabed slope model trough 101 is the same width as the inner wall of the wave environment simulation chamber 100, and its length is slightly less than the horizontal distance between the two bidirectional circulating ocean current inlets (outlets) (first circulating ocean current inlet / outlet 205a, second circulating ocean current inlet / outlet 205b), so as to prevent the ocean current from causing unreasonable scouring of the seabed slope in the model trough when it turns through the inlet / outlet.

[0038] The artificial seabed slope model tank 101 has an array of insertion holes 101f inside. These holes 101f are used to insert a fixed support frame 101c. A pore pressure sensor 101b is mounted on the support frame 101c to record the pore water pressure response within the seabed slope under wave-current coupling. Furthermore, the pore pressure sensor 101b is connected to an external data measurement system, which is connected to an external control module. During implementation, the pore pressure sensor 101b can be inserted into the support frame 101c according to a specific arrangement to prevent sensor dislocation from affecting the test results. The artificial seabed slope model tank can also be used to prepare seabed slope models with different slopes by adjusting the heights of the front baffle 101d and the rear baffle 101e.

[0039] like Figure 1 , Figure 3 As shown, the wave-generating module 102 is located on the upper part of the inner wall of the wave environment simulation chamber 100, near the front baffle 101d of the artificial seabed slope model tank 101. The wave-generating module 102 includes a servo motor 102a, a transmission rod 102b, a wave-generating plate 102c, gear I 102d, gear II 102e, a frame 102f, a guide rail 102g, and a slider 102h. The servo motor 102a is fixed to the side wall of the bidirectional circulating ocean current simulation chamber 200 in the two-chamber centrifugal model box 1 by screws; the transmission rod 102b is connected to the output shaft of the servo motor 102a; the gear I 102d is set at the front end of the transmission rod 102b, the gear II 102e is set on the wave-making plate 102c, and the gear I 102d and the gear II 102e mesh with each other; the slider 102h is set at the top of the wave-making plate 102c; the frame 102f is fixed at the top of the wave environment simulation chamber 100, and a slide rail 102g is set in the center of the frame, and the slider 102h can move along the slide rail. The forward and backward movement of 102g drives the wave-making plate 102c to push the water body to form regular waves. The power is provided by the servo motor 102a fixed on the side wall of the bidirectional circulating ocean current simulation chamber 200. Specifically, the servo motor 102a is connected to an external control module. The gear I 102d at the front end of the transmission rod 102b meshes with the gear II 102e fixed on the wave-making plate 102c. By controlling the speed of the servo motor 102a, the frequency of the wave-making plate 102c is controlled. By selecting the appropriate size of the gear II 102e, the stroke of the wave-making plate 102c is controlled, thereby achieving regular waves with the target period and wave height.

[0040] like Figure 4 As shown, the wave-damping module 103 is positioned opposite the wave-generating module 102. The wave-damping module 103 includes a wave-damping slotted plate 103a and a position adjustment frame 103b. The position adjustment frame is fixed to the inner wall of the wave environment simulation chamber, and the wave-damping slotted plate is embedded in the position adjustment frame via pulleys. Specifically, pulleys 103c are provided at the four corners of the wave-damping slotted plate 103a, and a sliding groove 103d is provided on the position adjustment frame 103b. The wave-damping slotted plate 103a slides along the sliding groove 103d on the position adjustment frame 103b via the pulleys 103c.

[0041] Furthermore, such as Figure 1 , Figure 5As shown, the bidirectional circulating current simulation chamber 200 is used to provide bidirectional bottom currents with different velocities. It includes: a circulating current pump I 201 near the wave-generating module 102 and a circulating current pump II 202 near the wave-damping module 103, a gate valve 203 to control the flow rate, a flow meter 204 to display the flow rate, two inlets (outlets) (first circulating current inlet / outlet 205a, second circulating current inlet / outlet 205b) connecting the bidirectional circulating current simulation chamber 200 and the wave environment simulation chamber 100, grating plates (206a, 206b) installed at the inlet / outlet to intercept soil particles entering the bidirectional circulating current simulation chamber 200, and a bidirectional circulating current flow pipe 207. The circulating flow pump I 201 and the circulating flow pump II 202 are connected through a flow pipe 207. The gate valve 203 and the flow meter 204 are installed in the flow pipe 207. The two ends of the flow pipe 207 are respectively connected to the first circulating ocean current inlet and outlet 205a and the second circulating ocean current inlet and outlet 205b.

[0042] Preferably, the flow meter 204 is connected to an external control module, and can collect flow data electronically and transmit it to the external control module.

[0043] Furthermore, the high-speed camera system 3 includes a high-speed camera 301 facing the artificial seabed slope and an illumination lamp 302 providing a light source. Furthermore, the high-speed camera 301 is connected to an external control module via a transmission line to capture the deformation and instability failure process of the seabed slope model during the experiment. Furthermore, marker points or grid lines can be designed on the transparent plexiglass for subsequent image processing such as PIV analysis.

[0044] Based on the above system, centrifuge simulation tests of seabed slope failure can be conducted. As an example, the application scenario is as follows: Figure 6 As shown, the experiment includes the following steps:

[0045] (1) Adjust the position and angle of the high-speed camera 301, set the position of the lighting lamp 302 according to the position of the high-speed camera 301, fix the pore pressure sensor 101b on the support frame 101c according to the specific test plan, and further prepare simulated seabed slope soil samples as needed, fill them in the model trough 101, and correct the soil samples to the target geometric size of the seabed slope model 101a.

[0046] (2) Fill the wave environment simulation chamber 100 with water to the target depth of the test to form a simulated water environment;

[0047] (3) After the simulated water environment is formed, first start the circulating flow pump, adjust the gate valve, and adjust to the target flow rate by observing the flow meter according to the centrifugal similarity principle. Then, turn off the flow pump but keep the gate valve position unchanged. Then, turn on the beam geotechnical centrifuge 4 to the target centrifugal acceleration level, turn on the data measurement system to monitor the pore pressure sensor data, and stabilize it for a period of time;

[0048] (4) After the pore pressure sensor data stabilizes, start the circulating flow pump (circulating flow pump I, circulating flow pump II), adjust the ocean current flow rate to the target flow rate through gate valve 203, and stabilize it for a period of time;

[0049] (5) Observe the flow meter data. After the flow meter 204 displays a stable flow for a period of time, start the servo motor 102a to turn on the wave generation module 102. At the same time, by adjusting the speed of the servo motor 102a, regular waves with different periods and wave heights are generated to collect the pore pressure sensor data and one-sided image.

[0050] (6) After the test is completed, turn off the beam geotechnical centrifuge 4 until it stops, clean the test soil sample, restore the initial state, and carry out subsequent data processing and related research.

[0051] 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 centrifugal simulation system for simulating the effects of waves and currents on a seabed slope, characterized in that: It includes a two-chamber centrifuge model box (1) and a high-speed camera system (3); The two-chamber centrifuge model box (1) includes a wave environment simulation chamber (100) with transparent plexiglass on one side and a two-way circulating current simulation chamber (200); the high-speed camera system (3) is set in front of the transparent plexiglass of the wave environment simulation chamber (100) and captures images of the entire process of seabed slope deformation, instability and failure through the transparent plexiglass. The wave environment simulation chamber (100) includes an artificial seabed slope model tank (101), a wave-generating module (102), and a wave-dissipating module (103); wherein the artificial seabed slope model tank (101) is located at the lower center of the wave environment simulation chamber (100); the wave-generating module (102) and the wave-dissipating module (103) are arranged opposite to each other, wherein the wave-generating module (102) is located on the upper part of one side of the wave environment simulation chamber (100), and the wave-dissipating module (103) is located on the upper part of the other side of the wave environment simulation chamber (100); The wave-generating module (102) includes a servo motor (102a), a transmission rod (102b), a wave-generating plate (102c), gear I (102d), gear II (102e), a frame (102f), a guide rail (102g), and a slider (102h). The servo motor (102a) is fixed on the side wall of the bidirectional circulating ocean current simulation chamber (200) in the two-chamber centrifugal model box (1); the transmission rod (102b) is connected to the output shaft of the servo motor (102a); the gear I (102d) is located at the front end of the transmission rod (102b), the gear II (102e) is located on the wave-making plate (102c), and the gear I (102d) and gear II (102e) mesh with each other; the slider (102h) is located at the top of the wave-making plate (102c); the frame (102f) is fixed at the top of the wave environment simulation chamber (100), and a slide rail (102g) is provided in the center of the frame. The slider (102h) moves back and forth along the slide rail (102g) to drive the wave-making plate (102c) to move. Its power is provided by the servo motor (102a) fixed on the side wall of the bidirectional circulating ocean current simulation chamber (200).

2. The centrifugal simulation system for simulating wave-current action on a seabed slope as described in claim 1, characterized in that: The artificial seabed slope model tank (101) includes a seabed slope (101a), a pore pressure sensor (101b), and a support frame (101c); the artificial seabed slope model tank (101) is provided with an array of insertion holes (101f), the insertion holes (101f) are used to insert the support frame (101c), and the pore pressure sensor (101b) is set on the support frame (101c).

3. The centrifugal simulation system for simulating wave-current effects on a seabed slope as described in claim 1, characterized in that: The wave-damping module (103) includes a wave-damping slot plate (103a) and a position adjustment frame (103b); the four corners of the wave-damping slot plate (103a) are provided with pulleys (103c), and the position adjustment frame (103b) is provided with a sliding groove (103d). The wave-damping slot plate (103a) slides along the sliding groove (103d) on the position adjustment frame (103b) via the pulleys (103c).

4. The centrifugal simulation system for simulating wave-current action on a seabed slope as described in claim 1, characterized in that: The bidirectional circulating current simulation chamber (200) includes: circulating current pump I (201) and circulating current pump II (202), a gate valve (203) for controlling the flow rate, a flow meter (204) for displaying the flow rate, two circulating current inlets and outlets connecting the bidirectional circulating current simulation chamber (200) and the wave environment simulation chamber (100), and two grid plates installed at the inlets and outlets for intercepting soil particles entering the bidirectional circulating current simulation chamber (200); the circulating current pump I and the circulating current pump II are connected through a flow pipe (207), the gate valve (203) and the flow meter (204) are installed in the flow pipe (207), and the two ends of the flow pipe (207) are respectively connected to the two circulating current inlets and outlets.

5. The centrifugal simulation system for simulating wave-current action on a seabed slope as described in claim 1, characterized in that: The high-speed camera system (3) includes a high-speed camera (300) facing the artificial seabed ramp (101) and an illumination lamp (400) that provides a light source.

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