Fatigue experiment device for ocean platform

Abstract

The invention discloses a fatigue experiment device for an ocean platform, which is applied to the field of experiment equipment and comprises a water tank and a circulating water flow mechanism, an L-shaped plate is arranged in the water tank, and a wind generation mechanism and a wave generation mechanism are arranged on one side in the water tank from top to bottom; a wave dissipation mechanism and a moving mechanism are arranged on the other side and the middle end of the interior of the water tank correspondingly, a model platform is arranged at the top of an L-shaped plate, a second screw rod is rotationally connected to the interior of the water tank through a sealing bearing, and the other end of the second screw rod is fixedly connected with a second motor in a sleeving mode. The device can carry out adjustable accurate positioning on the model platform, is suitable for experiment detection of the model platform in each stage, guarantees the safety and data accuracy in the experiment process, can conveniently clean internal impurities and water scale outwards, is simple and convenient to operate, avoids disassembly and assembly of internal blocking components, and improves the detection efficiency. And the cleaning burden of personnel is relieved.

Description

Technical Field

[0001] The invention relates to the field of experimental equipment, in particular to a fatigue experimental device for an offshore platform. Background Art

[0002] At present, a Chinese invention with announcement number CN104354829B discloses a fatigue test device for an offshore platform, which includes an offshore platform structure model, four layers of circular steel plates, a host computer, and sensors; the offshore platform structure model is placed at the center of the four layers of circular steel plates, and the four layers of circular steel plates are, from bottom to top, a base, a current layer test bench, a wave layer test bench, and a sea breeze layer test bench, each layer is connected to other layers through four outer steel columns evenly distributed on the circumference, and each of the three layers of the current layer test bench, the wave layer test bench, and the sea breeze layer test bench is provided with positioning and mounting holes every 22.5 degrees in the circumferential direction, and the positioning and mounting holes of the three layers correspond to each other one by one, and a current layer power output device, a wave layer power output device, and a sea breeze layer power output device are respectively placed on the positioning and mounting holes of the current layer test bench, the wave layer test bench, and the sea breeze layer test bench; the host computer controls the power output device and collects and processes the real-time detection signals of the sensors.

[0003] Although the existing device is equipped with an ocean current layer test bench, an ocean wave layer test bench, and an ocean breeze layer test bench, which can simulate the environment of advection, wave making, and wind making after the platform is placed, there are still other problems in the use process, such as the inability to accurately position the model platform in an adjustable manner, and the different positions of the model platform in the water tank will produce different experimental results. For example, the further back, the larger the waves generated, and the further forward, the stronger the wind force. If it is only placed inward and not fixed, it is very easy to cause the platform to shift and collide in the water tank, reducing the experimental effect and quality of the device. Moreover, It is not convenient to clean the scale and impurities formed at the bottom. When the device is in a static state, the impurities that fall into the interior will settle downwards, and the clean water inside will also form scale at the bottom after being placed for a long time. The production of scale and impurities will cause the internal water to deteriorate and produce odor. During regular cleaning, personnel need to enter from the top, and then remove the internal blocking components, and finally use handheld tools to clean the bottom, which is time-consuming and labor-intensive, and increases the workload of personnel. In order to solve the above-mentioned problems, we propose a fatigue test device for offshore platforms. Summary of the invention

[0004] The purpose of the present invention is to provide a fatigue test device for an offshore platform, which solves the problem that the existing test device cannot accurately position the model platform in an adjustable manner and is not convenient for cleaning the scale and impurities formed on the bottom of the interior.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A fatigue test device for an offshore platform comprises a water tank and a circulating water flow mechanism, wherein an L-shaped plate is arranged inside the water tank, and a model platform is arranged on the top of the L-shaped plate; A wind-generating mechanism and a wave-generating mechanism are respectively arranged on one side of the water tank from top to bottom, and a wave-dissipating mechanism and a moving mechanism are respectively arranged on the other side and the middle end of the water tank; The inside of the water tank is rotatably connected to a second screw rod through a sealed bearing, the other end of the second screw rod is fixedly sleeved with a second motor, the surface of the second screw rod is threadedly connected to a second threaded plate, the bottom of the second threaded plate is bolted to a cleaning plate, a sewage outlet is opened on one side of the water tank, and a baffle is bolted to one side of the water tank.

[0006] By adopting the above technical scheme, the model platform can be adjusted and precisely positioned, which is suitable for experimental detection of the model platform at various stages, ensuring the safety of the experiment and the accuracy of the data. At the same time, it can facilitate the cleaning of internal impurities and scale. The operation is simple and convenient, eliminating the need for disassembly and assembly of internal blocking components, reducing the cleaning burden of personnel, and is highly practical.

[0007] The present invention is further configured as follows: the circulating water flow mechanism includes a circulating pump, the bottom of the circulating pump is bolted to the back of the water tank through a pad, one end of the circulating pump is fixedly sleeved with a discharge pipe, the other end of the circulating pump is fixedly sleeved with a suction pipe, and the other ends of the discharge pipe and the suction pipe are respectively connected to the two sides of the front of the water tank.

[0008] By adopting the above technical scheme, the clean water inside the water tank can circulate through the setting of a circulation pump, a discharge pipe and a suction pipe. When the circulation pump is started, the clean water at the right end will be sucked in through the suction pipe. After the clean water is sucked in, it will be sent to the left end of the water tank through the discharge pipe.

[0009] The present invention is further configured as follows: the wind-generating mechanism includes a first shell, the first shell is bolted to the inside of the water tank, an axial flow fan is bolted to the inside of the first shell by screws, an air suction port is provided on one side of the first shell, a through groove used in conjunction with the air suction port is provided on one side of the water tank, an air exhaust port is provided on the other side of the first shell, and the bottom of the first shell and the air exhaust port are both tilted downward.

[0010] By adopting the above technical scheme, through the arrangement of the first shell, the axial flow fan, the air suction port and the air exhaust port, it is possible to simulate the wind blowing to the right inside the water tank. By starting the axial flow fan to rotate the internal impeller, the impeller will suck in the outside air through the air suction port and the through slot when rotating. After the air is sucked in, it will be blown inward from the air exhaust port.

[0011] The present invention is further configured as follows: the wave-making mechanism includes a second shell, the second shell is bolted to the inside of the water tank, a first fixed frame is welded to the top of the second shell, a cylinder is bolted to the inside of the first fixed frame through a pad, a wave-making plate is installed at the output end of the cylinder, a grille plate is embedded on the other side of the second shell, and the second shell, the wave-making plate and the grille plate are all made of stainless steel.

[0012] By adopting the above technical solution, through the arrangement of the second shell, the first fixed frame, the cylinder, the wave-making plate and the grille plate, the clean water in the water tank can be pushed to the right and form waves. By starting the cylinder to drive the wave-making plate to move inward, the wave-making plate will push the clean water when moving inward. After being pushed, the clean water will form waves through the action of the grille plate and be transmitted to the right.

[0013] The present invention is further configured as follows: the wave-breaking mechanism includes a fixed seat, the fixed seat is connected to the inside of the water tank by screws, a fixed plate is installed on the top of the fixed seat, the fixed plate is in an upwardly inclined state, a liquid inlet is opened inside the fixed plate, and a wire mesh is installed between the inside of the fixed seat and the fixed plate.

[0014] By adopting the above technical scheme, the waves transmitted to the right can be eliminated through the arrangement of the fixing seat, the fixing plate, the liquid inlet and the wire mesh. When the wave propagates to the position of the fixing plate, the wave continues to propagate through the liquid inlet, and the water flow generated by the wave is led to the lower part of the fixing plate, thereby avoiding the occurrence of water flow reflection events. Then the waves pass through the wire mesh in turn and flow back, and the wave reflection effect is weakened through the damping effect of the wire mesh, thereby consuming the wave energy and maintaining the normal propagation of the wave at the entrance of the wave-breaking device.

[0015] The present invention is further configured as follows: the moving mechanism includes a third shell, the interior of the third shell is bolted to the interior of the sink by screws, the front of the third shell is bolted with an inspection plate, the front of the inspection plate is integrally stamped with scale lines, the interior of the third shell is rotatably connected to a first screw rod through a bearing, the other end of the first screw rod is fixedly sleeved with a first motor, the surface of the first screw rod is threadedly connected to a first threaded plate, and the front of the first threaded plate is welded to the back of the L-shaped plate.

[0016] By adopting the above technical solution, the L-shaped plate can be driven and moved stably to the left or right through the arrangement of the third housing, the first screw rod, the first motor and the first threaded plate.

[0017] The present invention is further configured as follows: two slide rails are bolted inside the third housing, sliders are welded to the top and bottom of the first threaded plate, and the other side of the slider is slidably connected to the inside of the slide rails.

[0018] By adopting the above technical solution, the first threaded plate can be limited by setting the slide rail and the slider to prevent the first threaded plate from flipping over during the left-right movement.

[0019] The present invention is further configured as follows: a bearing plate is welded to the top of the L-shaped plate, a screw rod is welded to the bottom of the model platform, the other end of the screw rod passes through and extends to the bottom of the bearing plate, a nut is threadedly connected to the surface of the screw rod, a spring washer is slidably sleeved on the surface of the screw rod, and fixing rings are welded on both sides of the bearing plate.

[0020] By adopting the above technical solution, the model platform can be fixed by arranging the bearing plate, the screw rod, the nut and the fixing ring.

[0021] The present invention is further configured as follows: a protective cover is bolted to the other side of the water tank, a heat dissipation groove is opened on the front of the protective cover, and a dustproof net is installed inside the heat dissipation groove.

[0022] By adopting the above technical solution and providing a protective cover, the second motor can be protected to prevent the second motor from being damaged by collision with foreign objects.

[0023] The present invention is further configured as follows: a limiting rod is provided through one side of the second threaded plate, and both ends of the limiting rod are welded to the inside of the water tank.

[0024] By adopting the above technical solution, the second threaded plate can be limited by setting the limiting rod to prevent the second threaded plate from flipping over during the process of moving left and right.

[0025] In summary, the present invention has the following beneficial effects: 1. The present invention puts the model platform into the water tank and fixes it to the bearing plate. After the model platform is fixed, the first motor is started. After the first motor is started, the first motor drives the first screw to rotate through the cooperation of the third shell. When the first screw rotates, it drives the first threaded plate to move rightward through the cooperation of the slide rail and the slider. When the first threaded plate moves rightward, it drives the L-shaped plate and the model platform to move rightward together. When the L-shaped plate moves rightward, its own position can be understood by observing the scale line. Finally, the circulating pump, the axial flow fan and the cylinder are started to conduct the experiment. The model platform can be adjusted and accurately positioned, which is suitable for experimental detection of the model platform at various stages, and ensures the safety of the experimental process and the accuracy of the data; 2. The present invention discharges the water inside the sink to the outside first during maintenance, and removes the baffle from the sink after the clean water inside is discharged. After the baffle is removed, the sewage outlet is exposed, and then the second motor is started to drive the second screw to rotate. When the second screw rotates, it drives the second threaded plate to move to the right with the cooperation of the limit rod. When the second threaded plate moves to the right, it drives the cleaning plate to push impurities and scale inward, and finally discharges them outward from the sewage outlet. This can facilitate the cleaning of internal impurities and scale, is simple and convenient to operate, eliminates the need for disassembly and assembly of internal blocking components, reduces the cleaning burden of personnel, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 It is a front cross-sectional view of the structure of the present invention; Figure 3 It is a schematic diagram of the back side of the structure of the present invention; Figure 4 It is a partial enlarged cross-sectional view of the structure of the present invention; Figure 5 This is an enlarged front cross-sectional view of the wind-generating mechanism of the present invention; Figure 6 is an enlarged front cross-sectional view of the wave-making mechanism of the present invention; Figure 7 It is an enlarged front sectional view of the wave eliminating mechanism of the present invention.

[0027] Reference numerals: 1, water tank; 2, L-shaped plate; 3, circulating water flow mechanism; 31, circulating pump; 32, drain pipe; 33, suction pipe; 4, wind-generating mechanism; 41, first shell; 42, axial flow fan; 43, air inlet; 44, air outlet; 5, wave-generating mechanism; 51, second shell; 52, first fixing frame; 53, cylinder; 54, wave-generating plate; 55, grille plate; 6, wave-eliminating mechanism; 61, fixing seat; 62, fixing plate; 6 3. Liquid inlet; 64. Wire mesh; 7. Moving mechanism; 71. Third shell; 72. First screw; 73. First motor; 74. First threaded plate; 8. Model platform; 9. Second screw; 10. Second motor; 11. Second threaded plate; 12. Cleaning plate; 13. Baffle; 14. Slide rail; 15. Slider; 16. Loading plate; 17. Screw; 18. Nut; 19. Fixing ring; 20. Protective cover; 21. Limit rod. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings. Example 1

[0029] refer to Figure 1-Figure 7A fatigue test device for an offshore platform comprises a water tank 1 and a circulating water flow mechanism 3, an L-shaped plate 2 is arranged inside the water tank 1, a model platform 8 is arranged on the top of the L-shaped plate 2, a wind-making mechanism 4 and a wave-making mechanism 5 are arranged on one side of the water tank 1 from top to bottom, and a wave-breaking mechanism 6 and a moving mechanism 7 are arranged on the other side and the middle end of the water tank 1.

[0030] Among them, the moving mechanism 7 includes a third shell 71, the interior of the third shell 71 is bolted to the interior of the water tank 1 by screws, the front of the third shell 71 is bolted with an inspection plate, the front of the inspection plate is integrally stamped with scale lines, the interior of the third shell 71 is rotatably connected to a first screw rod 72 through a bearing, the other end of the first screw rod 72 is fixedly sleeved with a first motor 73, the surface of the first screw rod 72 is threadedly connected to a first threaded plate 74, the front of the first threaded plate 74 is welded to the back of the L-shaped plate 2, and through the arrangement of the third shell 71, the first screw rod 72, the first motor 73 and the first threaded plate 74, the L-shaped plate 2 can be driven and driven to move stably to the left or right.

[0031] The model platform 8 is first placed into the water tank 1 and fixed to the supporting plate 16. When the model platform 8 is fixed, the first motor 73 is started. After starting, the first motor 73 will drive the first screw 72 to rotate with the cooperation of the third shell 71. When the first screw 72 rotates, it will drive the first threaded plate 74 to move right with the cooperation of the slide rail 14 and the slider 15. When the first threaded plate 74 moves to the right, it will drive the L-shaped plate 2 and the model platform 8 to move right together. When the L-shaped plate 2 moves to the right, its own position can be understood by observing the scale line. Finally, the circulating water flow mechanism 3, the wind-making mechanism 4 and the wave-making mechanism 5 can be tested. The model platform 8 can be adjusted and precisely positioned, which is suitable for experimental detection of the model platform 8 at various stages, ensuring the safety of the experimental process and the accuracy of the data.

[0032] refer to Figure 3 The circulating water flow mechanism 3 includes a circulating pump 31, the bottom of which is bolted to the back of the water tank 1 through a pad, one end of the circulating pump 31 is fixedly sleeved with a discharge pipe 32, and the other end of the circulating pump 31 is fixedly sleeved with a suction pipe 33, the other ends of the discharge pipe 32 and the suction pipe 33 are respectively connected to the two sides of the front of the water tank 1, through the arrangement of the circulating pump 31, the discharge pipe 32 and the suction pipe 33, the clean water inside the water tank 1 can circulate, when the circulating pump 31 is started, the clean water at the right end will be sucked in through the suction pipe 33, and after the clean water is sucked in, it will be sent to the left end of the water tank 1 through the discharge pipe 32.

[0033] refer to Figure 2 and Figure 5The wind-generating mechanism 4 includes a first shell 41, which is bolted to the inside of the water tank 1. An axial-flow fan 42 is bolted to the inside of the first shell 41 by screws. An air suction port 43 is provided on one side of the first shell 41, and a through slot used in conjunction with the air suction port 43 is provided on one side of the water tank 1. An air exhaust port 44 is provided on the other side of the first shell 41. The bottom of the first shell 41 and the air exhaust port 44 are both tilted downward. By arranging the first shell 41, the axial-flow fan 42, the air suction port 43 and the air exhaust port 44, a wind force blowing to the right can be simulated inside the water tank 1. By starting the axial-flow fan 42 to rotate the internal impeller, the impeller will inhale outside air through the air suction port 43 and the through slot when rotating, and the air will be blown inward from the air exhaust port 44 after being inhaled.

[0034] refer to Figure 2 and Figure 6 The wave-making mechanism 5 includes a second shell 51, which is bolted to the inside of the water tank 1. A first fixed frame 52 is welded to the top of the second shell 51. A cylinder 53 is bolted to the inside of the first fixed frame 52 through a pad. A wave-making plate 54 is installed at the output end of the cylinder 53. A grid plate 55 is embedded on the other side of the second shell 51. The second shell 51, the wave-making plate 54 and the grid plate 55 are all made of stainless steel. Through the arrangement of the second shell 51, the first fixed frame 52, the cylinder 53, the wave-making plate 54 and the grid plate 55, the clean water in the water tank 1 can be pushed to the right and form waves. By starting the cylinder 53, the wave-making plate 54 is driven to move inward. When the wave-making plate 54 moves inward, it will push the clean water. After being pushed, the clean water will form waves through the action of the grid plate 55 and be transmitted to the right.

[0035] refer to Figure 2 and Figure 7 The wave eliminating mechanism 6 includes a fixing seat 61, which is bolted to the inside of the water tank 1 by screws. A fixing plate 62 is installed on the top of the fixing seat 61, and the fixing plate 62 is in an upwardly inclined state. A liquid inlet 63 is opened inside the fixing plate 62, and a wire mesh 64 is installed between the inside of the fixing seat 61 and the fixing plate 62. Through the arrangement of the fixing seat 61, the fixing plate 62, the liquid inlet 63 and the wire mesh 64, the waves transmitted to the right can be eliminated. When the wave propagates to the position of the fixing plate 62, the wave continues to propagate through the liquid inlet 63, and the water flow generated by the wave is guided to the lower part of the fixing plate 62, thereby avoiding the occurrence of water flow reflection events, and then the waves pass through the wire mesh 64 in turn and flow back, and the wave reflection effect is weakened by the damping effect of the wire mesh 64, thereby consuming the wave energy and maintaining the normal propagation of the wave at the entrance of the wave eliminating device.

[0036] refer to Figure 4Two slide rails 14 are bolted to the inside of the third shell 71, and sliders 15 are welded to the top and bottom of the first threaded plate 74. The other side of the slider 15 is slidably connected to the inside of the slide rail 14. Through the setting of the slide rail 14 and the slider 15, the first threaded plate 74 can be limited to prevent the first threaded plate 74 from flipping over during the left and right movement.

[0037] refer to Figure 2 A bearing plate 16 is welded to the top of the L-shaped plate 2, a screw rod 17 is welded to the bottom of the model platform 8, the other end of the screw rod 17 passes through and extends to the bottom of the bearing plate 16, a nut 18 is threadedly connected to the surface of the screw rod 17, a spring washer is slidably sleeved on the surface of the screw rod 17, and fixing rings 19 are welded on both sides of the bearing plate 16. The model platform 8 can be fixed by setting the bearing plate 16, the screw rod 17, the nut 18 and the fixing ring 19.

[0038] Brief description of the usage process: first put the model platform 8 into the water tank 1 and fix it to the bearing plate 16. When the model platform 8 is fixed, start the first motor 73. After starting, the first motor 73 will drive the first screw 72 to rotate with the cooperation of the third shell 71. When the first screw 72 rotates, it will drive the first threaded plate 74 to move right with the cooperation of the slide rail 14 and the slider 15. When the first threaded plate 74 moves to the right, it will drive the L-shaped plate 2 and the model platform 8 to move right together. When the L-shaped plate 2 moves to the right, it can understand its own position by observing the scale line. Finally, start the circulating pump 31, the axial flow fan 42 and the cylinder 53 to conduct the experiment. Example 2

[0039] refer to Figure 1 , Figure 2 and Figure 3 A fatigue test device for an offshore platform, wherein a second screw rod 9 is rotatably connected to the inside of a water tank 1 through a sealed bearing, a second motor 10 is fixedly sleeved on the other end of the second screw rod 9, a second threaded plate 11 is threadedly connected to the surface of the second screw rod 9, a cleaning plate 12 is bolted to the bottom of the second threaded plate 11, a sewage outlet is provided on one side of the water tank 1, a baffle plate 13 is bolted to one side of the water tank 1, and the water inside the water tank 1 is firstly discharged to the outside during maintenance, and the baffle plate 13 is removed from the water tank 1 after the internal clean water is discharged, After the baffle 13 is removed, the sewage outlet will be exposed, and then the second motor 10 is started to drive the second screw 9 to rotate. When the second screw 9 rotates, it will drive the second threaded plate 11 to move to the right with the cooperation of the limit rod 21. When the second threaded plate 11 moves to the right, it will drive the cleaning plate 12 to push the impurities and scale inward, and finally discharge them outward from the sewage outlet, which can facilitate the cleaning of internal impurities and scale. The operation is simple and convenient, eliminates the need for disassembly and assembly of internal blocking components, reduces the cleaning burden of personnel, and is highly practical.

[0040] refer to Figure 1 , Figure 2 and Figure 3 A protective cover 20 is bolted to the other side of the water tank 1. A heat dissipation groove is provided on the front of the protective cover 20. A dustproof net is installed inside the heat dissipation groove. Through the setting of the protective cover 20, the second motor 10 can be protected to prevent the second motor 10 from being damaged by collision with foreign objects.

[0041] refer to Figure 2 A limiting rod 21 is provided on one side of the second threaded plate 11, and both ends of the limiting rod 21 are welded to the inside of the water tank 1. Through the setting of the limiting rod 21, the second threaded plate 11 can be limited to prevent the second threaded plate 11 from flipping over during the left and right movement.

[0042] A brief description of the usage process: during maintenance, the water inside the water tank 1 is first drained outwards. After the clean water inside is drained out, the baffle 13 is removed from the water tank 1. After the baffle 13 is removed, the sewage outlet is exposed, and then the second motor 10 is started to drive the second screw 9 to rotate. When the second screw 9 rotates, it will drive the second threaded plate 11 to move rightward with the cooperation of the limit rod 21. When the second threaded plate 11 moves to the right, it will drive the cleaning plate 12 to push the impurities and scale inwards, and finally discharge them outwards from the sewage outlet.

Claims

1. A fatigue test device for an offshore platform, comprising a water tank (1) and a circulating water flow mechanism (3), characterized in that: An L-shaped plate (2) is arranged inside the water tank (1), and a model platform (8) is arranged on the top of the L-shaped plate (2); A wind-generating mechanism (4) and a wave-generating mechanism (5) are respectively arranged on one side of the interior of the water tank (1) from top to bottom, and a wave-dissipating mechanism (6) and a moving mechanism (7) are respectively arranged on the other side and the middle end of the interior of the water tank (1); A second screw rod (9) is rotatably connected to the interior of the water tank (1) via a sealed bearing, a second motor (10) is fixedly sleeved on the other end of the second screw rod (9), a second threaded plate (11) is threadedly connected to the surface of the second screw rod (9), a cleaning plate (12) is bolted to the bottom of the second threaded plate (11), a sewage outlet is provided on one side of the water tank (1), and a baffle plate (13) is bolted to one side of the water tank (1).

2. A fatigue test device for an offshore platform according to claim 1, characterized in that: The circulating water flow mechanism (3) comprises a circulating pump (31), the bottom of the circulating pump (31) being bolted to the back of the water tank (1) via a pad, one end of the circulating pump (31) being fixedly sleeved with a liquid discharge pipe (32), the other end of the circulating pump (31) being fixedly sleeved with a liquid suction pipe (33), the other ends of the liquid discharge pipe (32) and the liquid suction pipe (33) being respectively connected to two sides of the front of the water tank (1).

3. A fatigue test device for an offshore platform according to claim 1, characterized in that: The wind-generating mechanism (4) comprises a first shell (41), the first shell (41) being bolted to the inside of the water tank (1), an axial flow fan (42) being bolted to the inside of the first shell (41) by means of screws, an air suction port (43) being provided on one side of the first shell (41), a through slot for use with the air suction port (43) being provided on one side of the water tank (1), an air exhaust port (44) being provided on the other side of the first shell (41), and the bottom of the first shell (41) and the air exhaust port (44) being both in a downwardly inclined state.

4. A fatigue test device for an offshore platform according to claim 1, characterized in that: The wave-making mechanism (5) comprises a second shell (51), the second shell (51) being bolted to the inside of the water tank (1), a first fixing frame (52) being welded to the top of the second shell (51), a cylinder (53) being bolted to the inside of the first fixing frame (52) via a backing plate, a wave-making plate (54) being installed at the output end of the cylinder (53), a grille plate (55) being embedded on the other side of the second shell (51), and the second shell (51), the wave-making plate (54) and the grille plate (55) are all made of stainless steel.

5. A fatigue test device for an offshore platform according to claim 1, characterized in that: The wave-dissipating mechanism (6) comprises a fixing seat (61), the fixing seat (61) being connected to the inside of the water tank (1) by means of screws, a fixing plate (62) being installed on the top of the fixing seat (61), the fixing plate (62) being in an upwardly inclined state, a liquid inlet (63) being provided inside the fixing plate (62), and a steel wire mesh (64) being installed between the inside of the fixing seat (61) and the fixing plate (62).

6. A fatigue test device for an offshore platform according to claim 1, characterized in that: The moving mechanism (7) comprises a third housing (71), the interior of the third housing (71) being bolted to the interior of the water tank (1) via screws, an inspection plate being bolted to the front of the third housing (71), a scale line being integrally stamped on the front of the inspection plate, a first screw rod (72) being rotatably connected to the interior of the third housing (71) via a bearing, a first motor (73) being fixedly sleeved at the other end of the first screw rod (72), a first threaded plate (74) being threadedly connected to the surface of the first screw rod (72), and a front surface of the first threaded plate (74) being welded to the back surface of the L-shaped plate (2).

7. A fatigue test device for an offshore platform according to claim 6, characterized in that: Two slide rails (14) are bolted inside the third housing (71), and sliding blocks (15) are welded to the top and bottom of the first threaded plate (74), with the other side of the sliding block (15) being slidably connected to the inside of the slide rail (14).

8. A fatigue test device for an offshore platform according to claim 1, characterized in that: A bearing plate (16) is welded to the top of the L-shaped plate (2), a screw rod (17) is welded to the bottom of the model platform (8), the other end of the screw rod (17) passes through and extends to the bottom of the bearing plate (16), a nut (18) is threadedly connected to the surface of the screw rod (17), a spring washer is slidably sleeved on the surface of the screw rod (17), and fixing rings (19) are welded to both sides of the bearing plate (16).

9. A fatigue test device for an offshore platform according to claim 1, characterized in that: A protective cover (20) is bolted to the other side of the water tank (1), a heat dissipation groove is provided on the front side of the protective cover (20), and a dustproof net is installed inside the heat dissipation groove.

10. A fatigue test device for an offshore platform according to claim 1, characterized in that: A limiting rod (21) is provided through one side of the second threaded plate (11), and both ends of the limiting rod (21) are welded to the inside of the water tank (1).

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