A wave-absorbing device inside a supergravity wave model box

Abstract

This invention discloses a wave-absorbing device for a supergravity wave model box. The device includes a wave model box, a wave generator, a grid plate, a series of multi-stage wave-absorbing plates, and a wave-absorbing guide pipe. The wave generator is installed at the upper part of the wave-generating end of the wave model box, generating stable waves with a fixed frequency and height by slapping the water surface. The grid plate is vertically installed inside the wave model box between the wave-generating end and the wave-absorbing end, used for initial wave breaking and absorption. The series of multi-stage wave-absorbing plates are installed at the wave-absorbing end inside the wave model box, arranged in a sloping manner, for further wave breaking and absorption. The wave-absorbing guide pipe is installed on the outside of the wave model box, with one end connected to the wave-absorbing end and the other end connected to the wave-generating end. Active wave absorption is achieved through the wave-absorbing material inside the guide pipe and the movement of water flow. This invention can provide an efficient experimental platform for the research of wave-related issues in marine engineering.

Description

Technical Field

[0001] This utility model belongs to the field of marine engineering model testing technology, specifically relating to a wave-absorbing device inside a supergravity wave model box. Background Technology

[0002] As marine engineering advances into the deep sea, the impact and weakening of structures and foundations by extreme winds, waves, and currents are critical issues that urgently need to be addressed. Wave model tests under hypergravity fields are the most similar experimental methods and a powerful means to tackle wave-related problems. However, due to limitations in the size of the model box, it is difficult to solve the problem of wave reflection, meaning that the low wave absorption efficiency has seriously restricted the development of this technology.

[0003] In the early stages, the main method for absorbing waves in wave pools under hypergravity was to attach porous geosynthetic materials to the absorbing end of the model box. The mesh of the composite material was used to break up the waves and dissipate their energy, thus achieving the wave absorption effect. However, due to the small size of the wave model box, the limited space for absorbing material placement, and the uniform mesh size of the material, it was impossible to absorb waves efficiently. A considerable portion of the waves was still reflected back into the model box, resulting in unstable wave morphology and making it difficult to carry out normal experimental research.

[0004] To solve the problem of wave reflection in a hypergravity wave model box, it is urgent to develop a wave-absorbing device for the hypergravity wave model box. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a wave-absorbing device inside a supergravity wave model box.

[0006] This utility model is achieved through the following technical solution: A wave-absorbing device for a supergravity wave model tank includes a wave model tank, a wave generator, a grid plate, a series of multi-stage wave-absorbing plates, and a wave-absorbing guide pipe. The wave generator is installed at the upper part of the wave-generating end of the wave model tank, generating stable waves with a fixed frequency and wave height by slapping the water surface. The grid plate is vertically installed inside the wave model tank between the wave-generating end and the wave-absorbing end, used for initial wave breaking and absorption. The series of multi-stage wave-absorbing plates are installed at the wave-absorbing end inside the wave model tank, arranged in a sloping manner, for further wave breaking and absorption. The wave-absorbing guide pipe is installed on the outside of the wave model tank, with one end connected to the wave-absorbing end and the other end connected to the wave-generating end, achieving active wave absorption through the wave-absorbing material inside the wave-absorbing guide pipe and the movement of water flow.

[0007] In the above technical solution, the wave model box is composed of an aluminum alloy box body and an organic glass observation panel.

[0008] In the above technical solution, the grating plate is made of aluminum alloy sheet with equally spaced holes, so that the width and spacing of the holes are adapted to the frequency and wavelength of the waves. Through frequency resonance and liquid viscosity dissipation, a portion of the waves are initially absorbed and the waves are initially broken up.

[0009] In the above technical solution, the series multi-stage absorbing plate includes a porous mounting shell and a multi-stage absorbing material body installed in the porous mounting shell.

[0010] In the above technical solution, the multi-level absorbing material body includes a first-level absorbing material body, a second-level absorbing material body, and a third-level absorbing material body arranged sequentially from the outside to the inside, and the porosity of the first-level absorbing material body, the second-level absorbing material body, and the third-level absorbing material body decreases sequentially.

[0011] In the above technical solution, the pore size of the first-stage absorbing material, the second-stage absorbing material, and the third-stage absorbing material is controlled between 10mm and 0.1mm.

[0012] In the above technical solution, the tilt angle of the multi-stage absorbing plates in series is 30º-75º to reduce the direct reflection of waves.

[0013] In the above technical solution, the wave-absorbing guide tube includes a guide tube and a power propeller and wave-absorbing material disposed inside the guide tube. One end of the guide tube is a water intake port and the other end is a water spray port.

[0014] In the above technical solution, the intake port and spray nozzle of the guide pipe adopt a funnel-shaped structure for a smooth transition and to reduce the eddies generated in the water flow.

[0015] In the above technical solution, the power propeller is installed in the middle of the guide pipe to generate internal water circulation.

[0016] In the above technical solution, the wave generator includes a wave-generating block, a servo motor, and a vertical drive mechanism. The wave-generating block is connected to the bottom of the vertical drive mechanism, and the servo motor is connected to the vertical drive mechanism as a power source, thereby driving the vertical drive mechanism to move the wave-generating block up and down, impacting the water surface to generate regular waves.

[0017] In the above technical solution, the vertical drive mechanism adopts the following structure: including guide columns, mounting frame, first rocker arm and second rocker arm. The guide columns are vertically slidably mounted on the mounting frame. There are two guide columns, located on both sides of the servo motor. The bottom end of the guide column is connected to the wave-making block. The guide columns enable the wave-making block to have the freedom to move vertically up and down. The servo motor is horizontally mounted on the top of the wave model box. The drive shaft of the servo motor is fixedly connected to one end of the first rocker arm. The other end of the first rocker arm is hinged to one end of the second rocker arm. The other end of the second rocker arm is hinged to the wave-making block.

[0018] The advantages and beneficial effects of this utility model are as follows: (1) This utility model uses a wave-absorbing guide pipe for active wave absorption, which draws in the previously unabsorbable clutter into the pipe and eliminates it completely through the circulating water flow, thus significantly improving the wave absorption efficiency.

[0019] (2) This utility model adopts a passive wave absorption system composed of multi-stage wave-absorbing plates and grid plates in series, which breaks the waves and absorbs them in stages, effectively reducing wave reflection and facilitating waveform stability.

[0020] (3) This utility model adopts a combination of active and passive wave absorption, and independently innovates the wave absorption method. It has high wave absorption efficiency, good waveform matching degree, compact structure design, reasonable layout, high degree of automation, and simple operation. It solves the problem of wave waveform disorder under hypergravity field and can provide an efficient test platform for the study of wave-related issues in marine engineering. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the wave-absorbing device inside the supergravity wave model box.

[0022] Figure 2 This is a schematic diagram of a grating panel.

[0023] Figure 3 This is a schematic diagram of a series of multi-stage absorbing plates.

[0024] Figure 4 This is a schematic diagram of a wave-absorbing guide tube.

[0025] Figure 5 This is a schematic diagram of a wave generator.

[0026] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.

[0028] This embodiment provides a wave-absorbing device inside a supergravity wave model box, such as... Figures 1-4As shown, the device includes a wave model box 1, a wave generator 2, a grid plate 3, a series multi-stage wave-absorbing plate 4, and a wave-absorbing guide pipe 5. The wave generator 2 is installed on the upper part of the wave-generating end of the wave model box 1, generating stable waves with a fixed frequency and wave height by slapping the water surface; the grid plate 3 is vertically installed inside the wave model box 1 between the wave-generating end and the wave-absorbing end, used to initially break up and absorb the waves; the series multi-stage wave-absorbing plate 4 is installed on the wave-absorbing end inside the wave model box 1, arranged in a sloping shape, used to break up and absorb the waves; the wave-absorbing guide pipe 5 is installed on the outside of the wave model box 1, with one end connected to the wave-absorbing end and the other end connected to the wave-generating end. Through the wave-absorbing material inside the wave-absorbing guide pipe 5 and the movement of water flow, an active wave-absorbing effect is achieved, thereby realizing the non-reflective wave absorption function.

[0029] As a preferred embodiment, the wave model box 1 is further composed of an aluminum alloy box body 1-1 and an acrylic observation plate 1-2. Furthermore, the outer contour frame of the acrylic observation plate 1-2 is reinforced with an aluminum alloy frame 1-3, and the joints are sealed with double-layer rubber rings to ensure that the main body does not deform or leak under a hypergravity field.

[0030] As a preferred embodiment, the grating plate 3 is made of aluminum alloy sheet 3-1, and equally spaced holes 3-2 are opened according to the wave absorption theory, so that the width and spacing of the holes 3-2 are adapted to the frequency and wavelength of the waves. Through frequency resonance and liquid viscosity dissipation, a portion of the waves are initially absorbed and the waves are initially broken up.

[0031] As a preferred embodiment, the series multi-stage absorbing plate 4 further comprises a porous mounting shell 4-4 and a multi-stage absorbing material body installed within the porous mounting shell 4-4; in this embodiment, the multi-stage absorbing material body comprises a first-stage absorbing material body 4-1, a second-stage absorbing material body 4-2, and a third-stage absorbing material body 4-3 arranged sequentially from the outside to the inside, and the porosity of the first-stage absorbing material body 4-1, the second-stage absorbing material body 4-2, and the third-stage absorbing material body 4-3 decreases sequentially (i.e., the second-stage absorbing material body 4-1, the second-stage absorbing material body 4-2, and the third-stage absorbing material body 4-3 decreases sequentially). The pore size of material body 4-2 is smaller than that of the first-stage absorbing material body 4-1, and the pore size of the third-stage absorbing material body 4-3 is smaller than that of the second-stage absorbing material body 4-2, thereby achieving the purpose of absorbing waves in multiple stages in series. Furthermore, the pore size of the first-stage absorbing material body 4-1, the second-stage absorbing material body 4-2, and the third-stage absorbing material body 4-3 is controlled between 10mm and 0.1mm. Furthermore, the tilt angle of the multi-stage absorbing plate 4 in series is between 30º and 75º to reduce the direct reflection of waves.

[0032] As a preferred embodiment, the wave-absorbing guide pipe 5 further comprises a guide pipe 5-1, a power propeller 5-2 disposed inside the guide pipe 5-1, and wave-absorbing material 5-3. One end of the guide pipe 5-1 is a water intake 5-4, and the other end is a water spray nozzle 5-5, thereby generating a circulating water flow. Furthermore, the intake 5-4 and the water spray nozzle 5-5 of the guide pipe 5-1 adopt a trumpet-shaped structure for a smooth transition, reducing eddies generated in the water flow. Furthermore, the power propeller 5-2 is installed in the middle of the guide pipe 5-1 to circulate the internal water flow. Furthermore, the guide pipe 5-1 is filled with wave-absorbing material 5-3 to draw broken waves into the pipe and absorb them completely, thereby achieving the purpose of active wave absorption.

[0033] As a preferred method, further explanation can be found in the appendix. Figure 1 The wave generator 2 includes a wave-generating block 2-1, a servo motor 2-2, and a vertical drive mechanism 2-3. The wave-generating block 2-1 is connected to the bottom of the vertical drive mechanism 2-3. The servo motor 2-2 serves as a power source connected to the vertical drive mechanism 2-3, thereby driving the vertical drive mechanism 2-3 to move the wave-generating block 2-1 up and down, impacting the water surface to generate regular waves. Further, the wave-generating block 2-1 is a triangular block. See also the appendix for further details. Figure 5 The vertical drive mechanism 2-3 can adopt the following structure: including guide posts 2-31, mounting frame 2-32, first rocker arm 2-33 and second rocker arm 2-34. The guide posts 2-31 are vertically slidably mounted on the mounting frame 2-32. Preferably, there are two guide posts 2-31, located on both sides of the servo motor 2-2. The bottom end of the guide posts 2-31 is connected to the wave-making block 2-1, thereby allowing the wave-making block 2-1 to have the freedom to move vertically up and down. The servo motor 2-2 is horizontally mounted on the top of the wave model box 1. The drive shaft of the servo motor 2-2 is fixedly connected to one end of the first rocker arm 2-33. The other end of the first rocker arm 2-33 is hinged to one end of the second rocker arm 2-34. The other end of the second rocker arm 2-34 is hinged to the wave-making block 2-1. During operation, the servo motor 2-2 drives the first rocker arm 2-33 and the second rocker arm 2-34 to move the wave-making block 2-1 up and down, striking the water surface to generate waves.

[0034] The working method of the wave-absorbing device inside the supergravity wave model box designed in this embodiment is as follows: (1) Select a grid plate 3 with appropriate opening spacing and hole width according to the wavelength and frequency of the wave, so that the hole area accounts for 0.3 to 0.5 of the total area of ​​the grid plate, and fix the grid plate 3 at a set distance from the wave-absorbing end of the wave model box 1. This distance is controlled between 50mm and 120mm to ensure that the grid plate 3 interacts with the wave and achieves the initial wave-absorbing purpose.

[0035] (2) Install the multi-stage absorbing plate 4 in series to the absorbing end of the wave model box 1, and adjust the tilt angle of the multi-stage absorbing plate 4 in series according to the wave reflection situation so that the tilt angle is adapted to the wave waveform and the wave reflection is minimized.

[0036] (3) Install the wave model box 1 into the geotechnical centrifuge basket, fix it firmly with a bracket to ensure that the components do not have relative displacement, and connect the control unit of each component and the data acquisition system to ensure that the data can be collected normally.

[0037] (4) Turn on the geotechnical centrifuge and after the wave model box 1 reaches the set hypergravity field, start the wave generator 2 to generate waves. According to the wave waveform, start the power propeller 5-2 in the wave-absorbing guide pipe 5 in time to absorb all the residual waves into the pipe and adjust the water flow speed in the wave-absorbing guide pipe 5 until there are no reflected noise waves in the wave model box.

[0038] (5) After the wave waveform stabilizes, wave-structure-foundation interaction or scour test shall be carried out as needed.

[0039] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly. Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between the components.

[0040] The present invention has been described above by way of example. It should be noted that, without departing from the core of the present invention, any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort fall within the protection scope of the present invention.

Claims

1. A wave-absorbing device for a supergravity wave model box, characterized in that: The device includes a wave model box, a wave generator, a grid plate, a series of multi-stage wave-absorbing plates, and a wave-absorbing guide pipe. The wave generator is installed on the upper part of the wave-generating end of the wave model box. The grid plate is vertically installed inside the wave model box between the wave-generating end and the wave-absorbing end. The series of multi-stage wave-absorbing plates are installed on the wave-absorbing end inside the wave model box and are arranged in a sloping manner. The wave-absorbing guide pipe is installed on the outside of the wave model box, with one end connected to the wave-absorbing end and the other end connected to the wave-generating end.

2. The wave-absorbing device inside the supergravity wave model box according to claim 1, characterized in that: The wave model box consists of an aluminum alloy box body and an plexiglass observation panel.

3. The wave-absorbing device inside the supergravity wave model box according to claim 1, characterized in that: The grating is made of thin aluminum alloy sheet with equally spaced holes.

4. The wave-absorbing device inside the supergravity wave model box according to claim 1, characterized in that: The series multi-stage absorbing plate includes a porous mounting shell and a multi-stage absorbing material body installed inside the porous mounting shell.

5. The wave-absorbing device inside the supergravity wave model box according to claim 4, characterized in that: The multi-stage absorbing material body includes a first-stage absorbing material body, a second-stage absorbing material body, and a third-stage absorbing material body arranged sequentially from the outside to the inside, and the porosity of the first-stage absorbing material body, the second-stage absorbing material body, and the third-stage absorbing material body decreases sequentially.

6. The wave-absorbing device inside the supergravity wave model box according to claim 5, characterized in that: The pore size of the first-stage, second-stage, and third-stage absorbing materials is controlled between 10mm and 0.1mm.

7. The wave-absorbing device inside the supergravity wave model box according to claim 1, characterized in that: The wave-absorbing guide tube includes a guide tube and a power propeller and wave-absorbing material disposed inside the guide tube. One end of the guide tube is a water intake port and the other end is a water spray port.

8. The wave-absorbing device inside the supergravity wave model box according to claim 7, characterized in that: The intake port and spray nozzle of the guide pipe are of the trumpet shape.

9. The wave-absorbing device inside the supergravity wave model box according to claim 1, characterized in that: The wave generator includes a wave-generating block, a servo motor, and a vertical drive mechanism. The wave-generating block is connected to the bottom of the vertical drive mechanism, and the servo motor is connected to the vertical drive mechanism as a power source.

10. The wave-absorbing device inside the supergravity wave model box according to claim 9, characterized in that: The vertical drive mechanism adopts the following structure: it includes guide columns, a mounting frame, a first rocker arm, and a second rocker arm. The guide columns are vertically slidably mounted on the mounting frame. There are two guide columns, located on both sides of the servo motor. The bottom end of the guide column is connected to the wave-making block. The guide columns enable the wave-making block to have the freedom to move vertically up and down. The servo motor is horizontally mounted on the top of the wave model box. The drive shaft of the servo motor is fixedly connected to one end of the first rocker arm. The other end of the first rocker arm is hinged to one end of the second rocker arm, and the other end of the second rocker arm is hinged to the wave-making block.

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