A seabed slope model tank for simulating seabed hydrodynamic pressure waves

Abstract

The application discloses a seabed slope model box for simulating seabed moving water pressure waves, which comprises a seabed slope model chamber, a moving water pressure wave device, a power equipment chamber and a weight lowering device. The weight lowering device can lift the moving water pressure wave device assembly to hit the water body at the bottom of the model box, so as to stimulate the moving water pressure wave generated by the fault dislocation caused by the seabed earthquake, and then the real marine water environment simulation around the seabed slope in the earthquake process is realized. The application has the advantages of simple structure, simple driving force provided by the weight stack, manual remote control of the moving water pressure wave stimulation time, and indoor seabed slope test conditions which are more in line with the actual working conditions and easy to observe the results.

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 model box that simulates seabed dynamic water pressure waves. Background Technology

[0002] my country's marine engineering construction and marine energy development are gradually shifting from shallow to deep seas, leading to a booming development of marine engineering. However, submarine landslides are often massive in scale and have significant destructive effects, making them a crucial type of marine geological hazard that future marine engineering activities need to mitigate. Earthquakes are one of the most important triggering factors for submarine landslides. In recent years, model testing has gradually become the main method for simulating and studying these landslides, primarily through shaking table model box tests.

[0003] For landslide and soil landslide tests, the fabrication of relevant model boxes is relatively mature, and most of the submarine landslide tests conducted in recent years have directly adopted land slope model boxes. However, in the natural marine environment, the effect of overlying seawater on the slope cannot be ignored. Existing research shows that when seismic motion propagates from the seabed to the seawater layer, the difference in compressibility between seawater and soil generates compressive wave energy in the water, thus producing hydrodynamic pressure waves. Conventional tests neglect the transformation of seismic wave propagation at the soil-water interface due to the compressibility of water, and cannot accurately reflect actual working conditions. Therefore, it is necessary to design a device that can generate hydrodynamic pressure waves at the bottom of the model box to create a submarine slope test chamber that more closely resembles the actual natural environment. Summary of the Invention

[0004] In view of the problems existing in the prior art, this invention proposes a submarine slope model box for simulating submarine hydrodynamic pressure waves. This model box can generate hydrodynamic pressure waves at the bottom of the water body, simulating a more realistic submarine site, and providing experimental technical support for research on earthquake-triggered submarine slopes in the field of marine geological disaster prevention and mitigation.

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

[0006] A model box for simulating seabed hydrodynamic pressure waves includes a seabed slope model chamber and a power equipment chamber, which are separated by a partition. The seabed slope model chamber is equipped with a hydrodynamic pressure wave device, and the power equipment chamber is equipped with a weight descent device.

[0007] The underwater slope model chamber is filled with water, with an underwater slope model stacked on the left end and a partition set on the right side; the front and back of the underwater slope model chamber are welded transparent acrylic plates, allowing the shape of the slope to be observed from the front or back.

[0008] The partition is used to separate water-containing and waterless environments;

[0009] The heavy object lowering device is located in the power equipment room. The top is supported by two fixed frame beams on the front and back of the power equipment room, and the bottom is anchored to the bottom of the power equipment room by a fixed plate.

[0010] The dynamic water pressure wave device is connected to the weight descent device via a steel cable and is used to generate dynamic water pressure waves.

[0011] Preferably, the dynamic water pressure wave device includes a crossbeam, a lifting pulley, a lifting steel cable, and a water-striking plate groove. The dynamic water pressure wave device is fixedly mounted on a transparent acrylic plate via the crossbeam; the lifting pulley is welded to the middle of the crossbeam; the water-striking plate groove has higher walls on all four sides and a lower center, forming a concave shape; the upper end of the lifting steel cable is wound around the center of the lifting pulley, and the lower end is divided into four strands and tied to the four corners of the water-striking plate groove.

[0012] Preferably, the weight lowering device includes a lowering steel cable, a lowering pulley, a fixed frame, a tension spring, a magnetic steel plate, an electromagnet, a boom, a load-bearing plate, a load-bearing frame, and a load-bearing rotating shaft;

[0013] The fixed frame includes fixed frame vertical beams, fixed frame horizontal beams, fixed frame pulley beams, and fixed plates; there are four fixed plates, which are bolted to the bottom of the power equipment room, and the fixed plates are welded to the four fixed frame vertical beams respectively; there are two fixed frame horizontal beams, and the two ends of each fixed frame horizontal beam are welded to the top of the two fixed frame vertical beams respectively; the fixed frame pulley beam is welded to the center of the fixed frame horizontal beam, and a lowering pulley is welded with a reserved opening in the middle.

[0014] Furthermore, there are four pairs of load-bearing frames, each welded to four fixed plates and located inside the mounting points of the vertical beams of the fixed frames. The top of each load-bearing frame has an opening, and a load-bearing pivot is installed between each pair of load-bearing frames. The load-bearing pivot is inserted into the top hole of the load-bearing frame. The lower part of the arm has an opening through which the load-bearing pivot passes, serving as the lever fulcrum and rotation axis of the arm. A magnetic steel plate is welded to the top of the arm, and the lower part of the arm has a hook-shaped protrusion that supports the load-bearing plate. The magnetic steel plates are paired opposite each other, with an electromagnet installed on one side of each pair. When energized, the opposing magnetic steel plates are attracted, causing the arm to rotate around the load-bearing pivot, separating the hook-shaped protrusion at the bottom of the arm from the load-bearing plate, causing the load-bearing plate to fall. The tension spring is connected at both ends to the upper part of the arm and the upper part of the vertical beam of the fixed frame, respectively, holding the arm in place. When the electromagnet is not energized, the hook-shaped protrusion at the bottom of the arm firmly holds the bottom of the load-bearing plate.

[0015] Furthermore, the descending pulley is welded to the middle of the fixed frame pulley beam; one end of the descending steel cable is connected to the lifting steel cable, and the other end wraps around the descending pulley and penetrates into the center of the load-bearing plate; the falling motion of the load-bearing plate drives the descending steel cable, serving as the power source for the dynamic water pressure wave device.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention proposes a submarine slope model box for simulating submarine hydrodynamic pressure waves. Compared to landslide model boxes, this model box, when applied to research on earthquake-triggered submarine slopes in the field of marine geological disaster prevention and mitigation, can generate hydrodynamic pressure waves at the bottom of the water body, simulating wave transmission at the soil-water interface of a more realistic submarine earthquake site. The invention features a simple mechanical structure and clearly defined equipment partitions, avoiding the waterproof sealing problems encountered when installing electrical equipment underwater. The size of the water-striking plate groove of the hydrodynamic pressure wave device can be easily changed according to the experimental conditions. Power is provided by the gravitational potential energy of the pre-loaded load-bearing plate, eliminating the need for a lifting motor. The release timing is controlled by the energization / de-energization of an electromagnet, which can meet the needs of generating hydrodynamic pressure waves at key time points in different experimental conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the seabed slope model box for simulating seabed hydrodynamic pressure waves according to the present invention;

[0019] Figure 2 This is a schematic diagram of the dynamic water pressure wave device of the seabed slope model box for simulating seabed dynamic water pressure waves according to the present invention.

[0020] Figure 3 This is a schematic diagram of the angle of the weight lowering device of the seabed slope model box for simulating seabed hydrodynamic pressure waves according to the present invention.

[0021] Figure 4 This is a schematic diagram of the weight lowering device angle 2 of the seabed slope model box for simulating seabed hydrodynamic pressure waves according to the present invention.

[0022] Figure 5 This is a schematic diagram of the fixing frame of the seabed slope model box for simulating seabed dynamic water pressure waves according to the present invention;

[0023] Figure 6 This is a partial schematic diagram of the weight lowering device of the seabed slope model box for simulating seabed hydrodynamic pressure waves according to the present invention.

[0024] Figure 7 This is a diagram illustrating the working principle of the weight lowering device of the seabed slope model box for simulating seabed hydrodynamic pressure waves according to the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100 Undersea slope model room, 101 Transparent acrylic panel, 102 Undersea slope model, 103 Partition;

[0027] 200 Power Equipment Room;

[0028] 3. Heavy load lowering device, 31. Lowering steel cable, 32. Lowering pulley, 33. Fixed frame, 331. Fixed frame vertical beam, 332. Fixed frame horizontal beam, 333. Fixed frame pulley beam, 334. Fixed plate, 34. Tension spring, 35. Magnetic steel plate, 351. Electromagnet, 36. Arm, 37. Load-bearing plate, 38. Load-bearing frame, 381. Load-bearing rotating shaft;

[0029] 4. Dynamic water pressure wave device, 41. Crossbeam, 42. Lifting pulley, 43. Lifting steel cable, 44. Water impact plate groove. Detailed Implementation

[0030] 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.

[0031] like Figure 1 A model box for simulating seabed hydrodynamic pressure waves includes a seabed slope model chamber 100 and a power equipment chamber 200, which are separated by a partition 103. A hydrodynamic pressure wave device 4 is installed in the seabed slope model chamber 100, and a weight descent device 3 is installed in the power equipment chamber 200.

[0032] The seabed slope model chamber 100 is filled with water, with a seabed slope model 102 stacked on the left end and a partition 103 set on the right side; the front and back of the seabed slope model chamber 100 are welded transparent acrylic plates 101, so that the shape of the slope can be observed from the front or the back.

[0033] The partition 103 is used to separate water-containing and waterless environments;

[0034] The heavy object lowering device 3 is located in the power equipment room 200. The top is supported by two fixed frame beams 332 on the front and back of the power equipment room 200, and the bottom is anchored to the bottom of the power equipment room 200 by a fixed plate 334.

[0035] The dynamic water pressure wave device 4 is connected to the weight lowering device 3 via a steel cable and is used to generate dynamic water pressure waves.

[0036] like Figure 2 As shown, the dynamic water pressure wave device 4 includes a crossbeam 41, a lifting pulley 42, a lifting steel cable 43, and a water-striking plate groove 44.

[0037] The dynamic water pressure wave device 4 is fixedly mounted on the transparent acrylic plate 101 via a crossbeam 41; the lifting pulley 42 is welded to the middle of the crossbeam 41; the upper end of the lifting steel cable 43 is wrapped around the center of the lifting pulley 42, and the lower end is divided into four strands and tied to the four corners of the water-striking plate groove 44 to maintain stable lifting in the water; the four walls of the water-striking plate groove 44 are high and the middle is low, forming a groove shape, which is more stable than ordinary flat plates when lifting; the lifting steel cable 43 drives the water-striking plate groove 44 to move up and down, and when it is lifted rapidly, it strikes the water to generate dynamic water pressure waves.

[0038] like Figures 3-6 As shown, the weight lowering device 3 includes a lowering steel cable 31, a lowering pulley 32, a fixing frame 33, a tension spring 34, a magnetic steel plate 35, an electromagnet 351, an arm 36, a load-bearing plate 37, a load-bearing frame 38, and a load-bearing rotating shaft 381.

[0039] like Figure 5 The fixed frame 33 includes a fixed frame vertical beam 331, a fixed frame horizontal beam 332, a fixed frame pulley beam 333, and a fixed plate 334. There are four fixed plates 334, which are bolted to the bottom of the power equipment room 200. The fixed plates 334 are welded to the four fixed frame vertical beams 331 respectively. There are two fixed frame horizontal beams 332. The two ends of each fixed frame horizontal beam 332 are welded to the top of two fixed frame vertical beams 331 respectively. The fixed frame pulley beam 333 is welded to the center of the fixed frame horizontal beam 332, and a lowering pulley 32 is welded with a reserved opening in the middle.

[0040] like Figure 6 There are four pairs of load-bearing frames 38, which are welded to four fixed plates 334 respectively and located inside the mounting point of the fixed frame vertical beam 331; the top of the load-bearing frame 38 has an opening, and a load-bearing rotating shaft 381 is installed between each pair of load-bearing frames 38, and the load-bearing rotating shaft 381 is inserted into the top hole of the load-bearing frame 38.

[0041] The lower part of the arm 36 has an opening through which the load-bearing pivot 381 passes, serving as the lever fulcrum and rotation axis of the arm 36. The top of the arm 36 is welded with a magnetic steel plate 35, and the lower part of the arm 36 has a hook-shaped protrusion that supports the load-bearing plate 37. The magnetic steel plates 35 are arranged in pairs, and an electromagnet 351 is installed on one side of each pair. When energized, the opposing magnetic steel plates 35 can be attracted, causing the arm 36 to rotate around the load-bearing pivot 381, causing the hook-shaped protrusion at the bottom of the arm 36 to separate from the load-bearing plate 37, and the load-bearing plate 37 will then fall.

[0042] The tension spring 34 is fixed at both ends to the upper part of the arm 36 and the upper part of the vertical beam 331 of the fixed frame, respectively, to pull the arm 36. When the electromagnet 351 is not energized, the hook-shaped protrusion at the lower part of the arm 36 firmly hooks the bottom of the load-bearing plate 37.

[0043] A heavy object is placed on the load-bearing plate 37, and the timing of the drop of the load-bearing plate 37 is controlled by controlling the timing of the electromagnet being energized, so as to meet the experimental requirements.

[0044] The descending pulley 32 is welded to the middle of the fixed frame pulley beam 333; one end of the descending steel cable 31 is connected to the lifting steel cable 43, and the other end is wrapped around the descending pulley 32 and drilled into the center of the load-bearing plate 37. The falling motion of the load-bearing plate 37 will drive the descending steel cable 31, which serves as the power source for the dynamic water pressure wave device 4.

[0045] Working principle: such as Figure 7 When using the seabed slope model box that simulates seabed hydrodynamic pressure waves according to the present invention, a heavy load is first placed on the load-bearing plate 37. The load-bearing plate 37 is supported by the hook-shaped protrusion at the lower part of the arm 36. The arm forms a lever with the load-bearing pivot 381 as the fulcrum. The tension spring 34 pulls the upper end of the arm to keep the arm 36 balanced. At this time, the water-striking plate groove 44 is in the water at the bottom of the seabed slope model chamber 100. At the appropriate activation time, the power supply of electromagnet 351 is turned on. Electromagnet 351 is at the lever with the least effort, attracting the magnetic steel plate 35 and pulling the arm 36 in the opposite direction to the tension spring 34 to rotate along the load-bearing shaft 381. The hook-shaped protrusion at the lower end of the arm 36 disengages from the load-bearing plate 37. The load-bearing plate 37 falls rapidly under the action of gravity and pulls the descending steel cable 31. Then, through the descending pulley 32 and the lifting pulley 42, the lifting steel cable 43 connected to the descending steel cable 31 is driven, thereby rapidly lifting the water-striking plate groove 44 and generating dynamic water pressure waves.

[0046] The seabed slope model box for simulating seabed hydrodynamic pressure waves provided by this invention can simulate the hydrodynamic pressure waves generated by earthquakes on the seabed in an indoor laboratory, and the parameters of the water-striking plate groove can be varied within a certain range, which can better meet the experimental requirements for hydrodynamic pressure waves.

[0047] The descriptions and figures above are provided for clarity only. Those skilled in the art should understand the description as a whole. The above descriptions are merely illustrative embodiments of the present invention and are not intended to limit the scope of the invention. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A seabed slope model box for simulating seabed hydrodynamic pressure waves, characterized in that, It includes a seabed slope model room (100) and a power equipment room (200), which are separated by a partition (103). The seabed slope model room (100) is equipped with a dynamic water pressure wave device (4), and the power equipment room (200) is equipped with a heavy object lowering device (3). The seabed slope model chamber (100) is filled with water, the seabed slope model (102) is stacked on the left end, and a partition (103) is set on the right side. Transparent acrylic plates (101) are welded to the front and back of the seabed slope model chamber (100); the partition (103) is used to separate the water-containing and waterless environments. The weight lowering device (3) is located in the power equipment room (200). The top is supported by two fixed frame beams (332) on the front and back of the power equipment room, and the bottom is anchored to the bottom of the power equipment room (200) by a fixed plate (334). The dynamic water pressure wave device (4) is connected to the weight lowering device (3) by a steel cable and is used to generate dynamic water pressure waves; The dynamic water pressure wave device (4) includes: a crossbeam (41), a lifting pulley (42), a lifting steel cable (43), and a water-striking plate groove (44); the dynamic water pressure wave device (4) is fixedly mounted on a transparent acrylic plate (101) through the crossbeam (41); the lifting pulley (42) is welded to the middle of the crossbeam (41); the water-striking plate groove (44) has high walls on all four sides and low walls in the middle, forming a groove shape; the upper end of the lifting steel cable (43) is wrapped around the center of the lifting pulley (42), and the lower end is divided into four strands and tied to the four corners of the water-striking plate groove (44).

2. The seabed slope model box for simulating seabed hydrodynamic pressure waves as described in claim 1, characterized in that, The weight lowering device (3) includes: a lowering steel cable (31), a lowering pulley (32), a fixed frame (33), a tension spring (34), a magnetic steel plate (35), an electromagnet (351), an arm (36), a load-bearing plate (37), a load-bearing frame (38), and a load-bearing rotating shaft (381). Wherein: the fixed frame (33) includes a fixed frame vertical beam (331), a fixed frame horizontal beam (332), a fixed frame pulley beam (333), and a fixed plate (334); there are four fixed plates (334), which are bolted to the bottom of the power equipment room (200), and the fixed plates (334) are welded to the four fixed frame vertical beams (331) respectively; there are two fixed frame horizontal beams (332), and the two ends of each beam are welded to the top of the two fixed frame vertical beams (331) respectively. The fixed frame pulley beam (333) is welded to the center of the fixed frame horizontal beam (332), and a lowering pulley (32) is welded with a reserved opening in the middle. The load-bearing frames (38) consist of four pairs, each welded to four fixed plates (334) and located inside the mounting point of the fixed frame vertical beam (331). The load-bearing frames (38) have openings at the top, and a load-bearing pivot (381) is installed between each pair of load-bearing frames (38). The load-bearing pivot (381) is inserted into the opening at the top of the load-bearing frame (38). The lower part of the arm (36) has an opening through which the load-bearing pivot (381) passes, serving as the lever fulcrum and rotation axis of the arm (36). A magnetic steel plate (35) is welded to the top of the arm (36), and the lower part of the arm (36) has a hook-shaped protrusion for support. The load-bearing plate (37) is supported; the magnetic steel plates (35) are paired up, and an electromagnet (351) is installed on one side of each pair. When energized, the magnetic steel plates can be attracted to each other and drive the arm (36) to rotate around the load-bearing shaft (381), so that the hook-shaped protrusion at the bottom of the arm (36) is separated from the load-bearing plate (37), and the load-bearing plate (37) falls down; the tension spring (34) is connected to the upper part of the arm (36) and the upper part of the fixed frame vertical beam (331) respectively, and pulls the arm (36). When the electromagnet (351) is not energized, the hook-shaped protrusion at the bottom of the arm (36) firmly holds the bottom of the load-bearing plate (37); The lowering pulley (32) is welded to the middle of the fixed frame pulley beam (333); one end of the lowering steel cable (31) is connected to the lifting steel cable (43), and the other end is wrapped around the lowering pulley (32) and drilled into the center of the load-bearing plate (37); the falling motion of the load-bearing plate drives the lowering steel cable, which serves as the power source for the dynamic water pressure wave device.

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