A wave run-up suppression structure and an experimental device

Abstract

The present invention discloses a wave climbing suppression structure and an experimental device. The structure includes: an upper connection assembly; a column, on which a wave suppression unit is provided, and the wave suppression unit can suppress wave climbing; a telescopic unit, one end of which is connected to the upper connection assembly, and the other end of the telescopic unit is connected to a fixed-angle connecting piece, and the fixed-angle connecting piece is connected to the column through a three-component force sensor. Among them, the telescopic unit can adjust the draft depth of the column, and the three-component force sensor can detect the wave acting force on the column. The present invention can effectively reduce the slamming phenomenon of waves on the lower deck and provide strong protection for personnel, equipment, property, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of marine equipment, and particularly relates to a wave run-up suppression structure and an experimental device. Background Art

[0002] In recent years, there have been many accidents of structural damage and casualties of personnel and property losses caused by wave slamming on offshore platforms in severe sea conditions. The causes of the accidents are wave run-up and overtopping on the deck. It is self-evident the significance of studying the wave run-up mechanism and air-gap performance, which can provide important data for the design and research and development of semi-submersible platforms. Considering that the wave surface evolution around the columns is relatively complex, wave run-up also has strong nonlinear characteristics, and at the same time, the column forms of new platforms are constantly updated in shape, and the numerical simulation calculation time is long and the calculation model needs to be verified. Therefore, the model test is the most effective method to study the wave run-up mechanism of columns.

[0003] The prior art cannot solve the wave run-up problem. The prior art usually chooses to increase the height of the lower deck to achieve it, which is costly and limited by factors such as the stability and weight of the platform, and has little application significance. Moreover, the experimental demonstration is difficult, and the operation cost of large-scale wave experiments is relatively high, and the economy is poor. Summary of the Invention

[0004] Based on this, it is necessary to provide a wave run-up suppression structure and an experimental device with good suppression effect, simple structure, convenient installation and low cost for the above technical problems.

[0005] A wave run-up suppression structure includes:

[0006] An upper connection assembly;

[0007] A column, on which a wave suppression unit is provided, and the wave suppression unit can suppress wave run-up;

[0008] A telescopic unit, one end of which is connected to the upper connection assembly, and the other end of the telescopic unit is connected to a fixed-angle connecting piece, and the fixed-angle connecting piece is connected to the column through a three-component force sensor. Wherein, the telescopic unit can adjust the draft of the column, and the three-component force sensor can detect the wave force acting on the column.

[0009] In one embodiment, the upper connection assembly includes a fixing plate and two fixed cross braces, and the two fixed cross braces are symmetrically arranged on the upper surface of the fixing plate.

[0010] In one embodiment, the wave suppression unit includes a neodymium magnet connecting plate and a suppression member. The neodymium magnet connecting plate is fixed to one side of the column facing the waves, and the suppression member is adsorbed and fixed to the neodymium magnet connecting plate. Among them, the suppression member includes a plurality of suppression blocks distributed in an array, and one side of each suppression block facing the waves has an inclined surface sloping downward.

[0011] In one embodiment, a limiting plate is fixed on the column, and the limiting plate is located above the neodymium magnet connecting plate.

[0012] In one embodiment, the telescopic unit includes a telescopic support rod. The upper end of the telescopic support rod is connected to the lower surface of the fixed plate, the lower end of the telescopic support rod is connected to a disc, and the disc is connected to a fixed-angle connecting member.

[0013] In one embodiment, the upper end of the telescopic support rod is connected to the lower surface of the fixed plate through a fixing nut, and the lower end of the telescopic support rod is connected to the disc through a connecting nut.

[0014] In one embodiment, a column fixing plate is provided at the top of the column, and the three-component force sensor is installed on the column fixing plate.

[0015] In one embodiment, the cross-sectional shape of the column is square, and the edges of the column have rounded corners.

[0016] An experimental device for a wave run-up suppression structure, comprising:

[0017] An experimental water tank, in which the wave run-up suppression structure is arranged;

[0018] A rocker-type wave maker for generating waves;

[0019] A wave height gauge arranged around the wave run-up suppression structure, and the wave height gauge can detect the wave height;

[0020] A color high-speed camera is arranged on one side of the column facing the waves, and the color high-speed camera can collect the wave run-up images.

[0021] The above wave run-up suppression structure and experimental device can significantly suppress the wave run-up phenomenon, guide the water body to splash outwards, and by adding a suppression member outside the column, the slamming phenomenon of the waves on the lower deck can be effectively reduced, providing strong protection for personnel, equipment, property, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of the wave run-up suppression structure of the present invention;

[0024] Figure 2 is a schematic structural diagram of another angle of the wave run-up suppression structure of the present invention;

[0025] Figure 3 is a partial schematic structural diagram of the wave run-up suppression structure of the present invention;

[0026] Figure 4 is a schematic layout structural diagram of the experimental water tank of the present invention;

[0027] Figure 5 is the wave run-up contour line under different suppression structure angles of the present invention. Detailed implementation manners

[0028] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively with reference to the relevant accompanying drawings. The preferred embodiments of the present invention are given in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Refer to Figures 1-5As shown in the figure, an embodiment of the present invention provides a wave climbing suppression structure, including: an upper connection component 1, a column 2, and a telescopic unit 4.

[0032] A wave suppression unit 3 is provided on the column 2, and the wave suppression unit 3 can suppress wave climbing.

[0033] One end of the telescopic unit 4 is connected to the upper connection component 1, the other end of the telescopic unit 4 is connected to a fixed angle connecting piece 5, and the fixed angle connecting piece 5 is connected to the column 2 through a three-component force sensor 6. Among them, the telescopic unit 4 can adjust the draft of the column 2, and the three-component force sensor 6 can detect the wave acting force on the column 2. Specifically, the three-component force sensor 6 is used to measure the longitudinal force, lateral force, and force in the direction perpendicular to the upper surface on the column 2. In this embodiment, the fixed angle connecting piece 5 can be processed into different sizes, so that different installation angles can be provided for the column 2, which is convenient for simulating the pitching angle of the column 2.

[0034] In an embodiment of the present invention, the upper connection component 1 includes a fixing plate 11 and two fixed cross braces 12, and the two fixed cross braces 12 are symmetrically arranged on the upper surface of the fixing plate 11.

[0035] In an embodiment of the present invention, the wave suppression unit 3 includes a neodymium magnet connecting plate 31 and a suppression member 32. The neodymium magnet connecting plate 31 is fixed on the side of the column 2 facing the wave, and the suppression member 32 is adsorbed and fixed on the neodymium magnet connecting plate 31. Among them, the suppression member 32 includes a plurality of suppression blocks 321 arranged in an array, and one side of each suppression block 321 facing the wave has a downward inclined slope 322. In this embodiment, the neodymium magnet connecting plate 31 is fixed inside the groove of the column 2, and neodymium magnets are also buried in the suppression member 32. The suppression member 32 and the neodymium magnet connecting plate 31 are connected by strong magnetism. It should be noted that the suppression block 321 adopts a triangular inclined plane structure, which can change the water flow direction, does not need to extend outward too much, has a small extension length, and is easy to fix.

[0036] In an embodiment of the present invention, a limiting plate 33 is fixed on the column 2, and the limiting plate 33 is located above the neodymium magnet connecting plate 31. In this way, the limiting plate 33 can limit the installation position of the suppression member 32, and when the suppression member 32 is impacted by waves, the limiting plate 33 can prevent the suppression member 32 from sliding.

[0037] In an embodiment of the present invention, the telescopic unit 4 includes a telescopic support rod. The upper end of the telescopic support rod is connected to the lower surface of the fixed plate 11, the lower end of the telescopic support rod is connected to the disc 7, and the disc 7 is connected to the fixed-angle connecting member 5. In this embodiment, by adjusting the height of the telescopic support rod, the draft depth of the column 2 can be adjusted.

[0038] Optionally, the upper end of the telescopic support rod is connected to the lower surface of the fixed plate 11 through a fixing nut 8, and the lower end of the telescopic support rod is connected to the disc 7 through a connecting nut 9.

[0039] In an embodiment of the present invention, a column fixing plate 21 is provided at the top of the column 2, and the three-component force sensor 6 is installed on the column fixing plate 21. In this way, it is convenient for the installation and disassembly of the three-component force sensor 6.

[0040] In an embodiment of the present invention, the cross-sectional shape of the column 2 is square, and the edges of the column 2 have rounded corners. In this way, the contact area with the waves can be increased, providing an effect of guiding the waves to splash outward.

[0041] An experimental device for a wave run-up suppression structure provided by an embodiment of the present invention includes: an experimental water tank 100, a rocker-type wave maker 200, a wave height meter, and a color high-speed camera 300.

[0042] The wave run-up suppression structure is arranged in the experimental water tank 100; specifically, the fixed cross brace 12 of the wave run-up suppression structure is rigidly fixed above the experimental water tank 100; the rocker-type wave maker 200 is used to generate waves; the wave height meters are arranged around the wave run-up suppression structure, and the wave height meters can detect the wave height; the color high-speed camera 300 is arranged on one side of the column 2 facing the waves, and the color high-speed camera 300 can collect the wave run-up images.

[0043] Specifically, the experimental water tank 100 of the present invention is 14 m long, 1.0 m wide, with a total depth of 1.2 m. During the experiment, the water depth is maintained at 0.85 m. The geometric dimensions of the column 2 are 0.1 m * 0.1 m * 0.4 m, the diameter of the rounded corner is 0.0375 m, the draft is 0.2 m, the material of the column 2 is epoxy resin, its top is fixed to the upper fixed-angle connecting member 5 through the three-component force sensor 6, and the brand model of the three-component force sensor 6 can be selected as: the 500N range (x, y, z) of the Japanese Kyowa Electric brand, and the data acquisition system can be selected to use EDX-200B for acquisition.

[0044] There are multiple columns of wave gauges (e.g., 5 columns) arranged around the column 2 to capture the real-time change of the wave surface height. A color high-speed camera 300 (10-bit CMOS) is used on the side of the column 2 to capture the water body climbing the wave in front of the column 2. The image resolution is selected as 1280*1024, and a high-power LED light source is used for local lighting. A sports camera GoPro is used to record the experiment throughout the front end of the column 2. The test conditions can be 10 groups of focused waves with different wave steepness and wave period combinations.

[0045] It should be noted that the present invention designs the suppressor 32 according to the shape of the column 2. Its shape refers to the characteristics of the flare structure of the ship and is designed as an inclined plane structure to guide and drain the climbing water flow to prevent slamming on the lower deck. According to the draft of the column 2 and the height of the column 2, it is determined that the suppressor 32 is a 5-layer structure. Optionally, considering factors such as processing technology, material strength, wave direction and vertical force of the column, and the ejection direction of the sputtered water body, etc., the spacing of the suppressor 32 is determined to be 10 mm, the first layer is 100 mm away from the water surface, arranged in five layers, and the flare angle is 50°.

[0046] In the experiment, focused waves with different wave steepness and periods are tested. Taking the focused wave with a wave period of 1 s and a wave amplitude of 0.06 m as an example, the suppression effects at different angles are statistically analyzed, and the water surface profile of the mid-section is drawn as Figure 5 shown. It can be seen that B3 (the wave suppression angles of B1 - B4 are 30°, 40°, 50° and 60° respectively) has a better suppression effect, can avoid the extension range of the lower deck, and the wave climbing suppression effects at different angles are obvious. The wave climbing phenomenon of the column without the suppressor 32 is obvious. From Figure 5 it can be seen that the suppressor 32 has an obvious suppression effect on wave climbing, can effectively avoid the slamming phenomenon, helps the stable operation of the offshore platform. At the same time, this design method can effectively experimentally verify various working conditions of wave climbing and provide an effective experimental platform.

[0047] In summary, the present invention has the following advantages:

[0048] 1. By guiding the sputtering direction of the rising water body, the effect of wave suppression is achieved, which solves the problems of wave climbing and even wave slamming on the offshore platform;

[0049] 2. The flare structures at different angles can improve its suppression effect on wave climbing;

[0050] 3. The suppression structure is small in volume, easy to install, simple in structure, and has low requirements for construction technology;

[0051] 4. The flare structure has an effective wave climbing suppression effect on waves below the installation height, and the upper structure has an obvious suppression effect on waves with large wave heights;

[0052] 5. The suppression method of the suppressor is to guide the water body to turn, without hard blocking the water flow, so as to reduce the vertical slamming load.

[0053] 6. The experimental device used in the present invention can independently adjust the draft of the model.

[0054] 7. In the experiment, the column can be adjusted by changing the fixed-angle connecting piece to simulate the pitching state during the movement of the platform.

[0055] 8. This experimental device can simulate different wave run-up experiments on marine columns, has a large modification space, a stable foundation, and strong system rigidity, and can meet the requirements of the wave run-up experimental environment.

[0056] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0057] The above-described embodiments only represent several implementation manners of the present application, but should not be construed as limiting the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A wave climbing suppression structure, characterized in that, Comprising: Upper connection assembly; A column, on which a wave suppression unit is provided, and the wave suppression unit can suppress wave run-up; A telescopic unit, one end of which is connected to the upper connection assembly, the other end of the telescopic unit is connected to a fixed-angle connecting piece, and the fixed-angle connecting piece is connected to the column via a three-component force sensor. Wherein, the telescopic unit can adjust the draft of the column, and the three-component force sensor can detect the wave acting force on the column.

2. The wave climbing suppression structure according to claim 1, characterized in that, The upper connection assembly includes a fixing plate and two fixed cross braces, and the two fixed cross braces are symmetrically arranged on the upper surface of the fixing plate.

3. The wave run-up suppression structure according to claim 2, wherein, The wave suppression unit includes a neodymium magnet connecting plate and a suppression member. The neodymium magnet connecting plate is fixed on the side of the column facing the wave, and the suppression member is adsorbed and fixed on the neodymium magnet connecting plate. Wherein, the suppression member includes a plurality of suppression blocks arranged in an array, and one side of each suppression block facing the wave has an inclined surface sloping downward.

4. The wave climbing suppression structure according to claim 3, characterized in that, A limiting plate is fixed on the column, and the limiting plate is located above the neodymium magnet connecting plate.

5. The wave run-up suppression structure according to claim 3 or 4, characterized in that, The telescopic unit includes a telescopic support rod. The upper end of the telescopic support rod is connected to the lower surface of the fixing plate, the lower end of the telescopic support rod is connected to a disc, and the disc is connected to the fixed-angle connecting piece.

6. The wave climbing suppression structure according to claim 5, wherein, The upper end of the telescopic support rod is connected to the lower surface of the fixing plate through a fixing nut, and the lower end of the telescopic support rod is connected to the disc through a connecting nut.

7. The wave climbing suppression structure according to claim 1, wherein A column fixing plate is provided at the top of the column, and the three-component force sensor is installed on the column fixing plate.

8. The wave climbing suppression structure according to claim 1, characterized in that, The cross-sectional shape of the column is square, and the edges of the column have rounded corners.

9. An experimental device using the wave run-up suppression structure according to any one of claims 1-8, characterized in that, Comprising: An experimental water tank, in which the wave run-up suppression structure is arranged; A rocking wave generator for generating waves; Wave gauges are arranged around the wave run-up suppression structure, and the wave gauges can detect the wave height; A color high-speed camera is arranged on the side of the column facing the wave, and the color high-speed camera can collect the wave run-up images.

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