A mooring chain fatigue test device for stabilizing deep-sea ships and its application

Abstract

The present invention relates to a fatigue test device for a mooring chain used to stabilize deep-sea ships and its application, and belongs to the technical field of test devices. The test device includes a water tank, a tensile member, a swing-driving member and an impact member, wherein the two ends of the water tank are respectively provided with a tensile member and a swing-driving member, and an impact member is provided on the ground on one side of the water tank; the tensile member includes a telescopic cylinder and a first hook, and a telescopic cylinder is fixedly provided at one end of the water tank, and the output end of the telescopic cylinder extends into the water tank, and the output end of the telescopic cylinder is provided with a first hook. The present invention can apply various loads such as stretching, contraction, swinging, and floating to the mooring chain, truly simulate the complex environment and stress state in the ocean, and ensure the authenticity of the test data.

Description

Technical Field

[0001] The invention relates to a fatigue test device for a mooring chain used to stabilize a deep-sea ship and application thereof, belonging to the technical field of test devices. Background Art

[0002] With the continuous development of marine engineering, the demand for offshore floating projects such as marine vessels and other facilities is also increasing. These facilities are usually fixed in the sea by marine engineering mooring chains. Therefore, mooring chains have become an important component to ensure the safety of these facilities. While providing important functions, mooring chains also face fatigue problems. For example, since mooring chains need to serve for a long time in harsh environments such as wind, waves, and tides, fatigue cracks may occur in the metal links of the mooring chains, which will reduce their strength and durability. At the same time, fatigue cracks will gradually expand and may eventually cause some or all of the links of the mooring chain to break, thereby losing the function of fixing the ship or facility and causing safety hazards.

[0003] The existing fatigue life test methods for mooring chains include field tests and simulation tests. Compared with field tests, simulation tests have the following advantages: first, they can optimize resource utilization. By simulating the real environment, field tests can be restored to the greatest extent under limited resources, and resources can be used more efficiently. Second, they can save costs. Field tests require a lot of manpower, equipment and time, while laboratory tests can complete multiple repeated tests in a relatively short period of time, greatly reducing costs. Finally, they are more flexible. Laboratory tests can adjust test plans and conditions as needed to adapt to different test requirements and product specifications, and have higher flexibility. Existing fatigue test devices are generally composed of load systems, control systems, clamping devices, data acquisition and analysis devices, etc. During the fatigue test, the sample is fixed on the test machine through the clamping device, and then the tensile load is applied through the load system. The control system ensures that the load changes according to the preset parameters. The test software processes and analyzes the collected data to obtain fatigue performance parameters such as fatigue limit, fatigue life, fatigue crack growth rate, etc.

[0004] However, the existing fatigue test device has limitations in the test process. It can only apply a single alternating load. It is difficult for the mooring chain to be subjected to multiple loads such as tension, contraction, swing, and floating at the same time. It cannot fully and truly simulate the complex environment and stress state in the ocean, resulting in a certain deviation between the test results and the actual working conditions, affecting the authenticity of the test data. For this reason, the present invention is proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a mooring chain fatigue test device for stabilizing deep-sea ships, which can apply various loads such as stretching, contraction, swinging, and floating to the mooring chain, truly simulating the complex environment and stress state in the ocean, and ensuring the authenticity of the test data.

[0006] The present invention also provides application of the above-mentioned mooring chain fatigue test device for stabilizing deep-sea ships.

[0007] The technical solution of the present invention is as follows:

[0008] A mooring chain fatigue test device for stabilizing deep-sea ships comprises a water tank, a tensile member, a driving pendulum member and an impact member, wherein the tensile member and the driving pendulum member are respectively arranged at both ends of the water tank, and the impact member is arranged on the ground at one side of the water tank;

[0009] The stretching member includes a telescopic cylinder and a first hook. The telescopic cylinder is fixedly arranged at one end of the water tank. The output end of the telescopic cylinder extends into the water tank. The output end of the telescopic cylinder is provided with a first hook.

[0010] The swing driving component includes a mounting seat, a rotating shaft, a swing rod, a second hook and a swing driving assembly. The mounting seat is fixedly arranged at the other end of the water tank, a rotating shaft is arranged on the mounting seat through a bearing, a swing rod is arranged on the top of the rotating shaft through a bearing, the other end of the swing rod passes through the waist-shaped hole on the water tank and extends to the inside of the water tank, a second hook is fixedly arranged at the other end of the swing rod, and the swing driving assembly is connected to the middle of the swing rod.

[0011] Preferably according to the present invention, the swing driving assembly includes a motor A, a connecting shaft, a crank and a rocker. The motor A is arranged at the bottom of the mounting seat, the connecting shaft is arranged on the output shaft of the motor A, the crank is arranged after the connecting shaft passes through the mounting seat, the crank is connected to the rocker, and the other end of the rocker is connected to a swing arm. The motor A is used to drive the connecting shaft and the crank to rotate, and then the swing arm is driven to swing through the rocker.

[0012] Preferably, according to the present invention, a sliding cavity is embedded in the side wall of the water tank where the waist-shaped hole is located, and a sliding ball is provided on the sliding sleeve of the swing rod, and the sliding ball is arranged in the sliding cavity to facilitate the swing rod to swing back and forth in the waist-shaped hole.

[0013] Preferably according to the present invention, the impact component includes a bracket, a supporting tube, a rotating assembly, a slide, a launching assembly and a delivering assembly. The bottom of the bracket is arranged on the ground, the upper side of the bracket is connected to the slide through the rotating assembly, the slide is an L-shaped plate, a launching assembly is arranged on the slide, a delivering assembly is arranged on the upper side of the launching assembly, a supporting tube is arranged between the bracket and the slide, the bottom of the supporting tube is fixedly connected to the bracket, the top is slidably connected to the slide, the inside of the supporting tube is a rotating assembly, the supporting tube can be used to support the weight of the slide, the launching assembly and the delivering assembly, and the slide can rotate circumferentially on the supporting tube without interfering with the slide.

[0014] Preferably, according to the present invention, the rotating assembly includes a rotating rod, a first gear, a second gear and a motor B, the rotating rod includes a first rod member and a second rod member, the first rod member and the second rod member are rotatably connected, the first rod member is fixed to the bracket, the second rod member is fixed to the slide, the second rod member is fixedly provided with a first gear, the motor B is supported on the bracket, the second gear is provided on the output shaft of the motor B, and the second gear is meshedly connected with the first gear.

[0015] Preferably, according to the present invention, a launching assembly includes a launching frame, a sliding rod, a launching rod, a spring, a rack plate, a half-toothed gear and a motor. A launching frame is arranged on the slideway, and the launching frame is a hollow rectangular parallelepiped. A launching rod is arranged in the launching frame, one end of the launching rod is connected to the sliding rod, and one end of the sliding rod is connected to the rack plate after passing through the launching frame and the slideway. A spring is mounted on the sliding rod, one end of the spring contacts the launching rod, and the other end contacts the slideway. A support plate is fixedly arranged on one side of the slideway, and a motor is arranged on the support plate. A half-toothed gear is arranged on the output shaft of the motor, and the half-toothed gear is meshingly connected with the rack plate.

[0016] Preferably, according to the present invention, the delivery component includes a storage box, a conveyor belt and an obstacle, the storage box is fixed on the upper side of the launch frame, a conveyor belt is fixedly provided on one side of the storage box, an obstacle is provided on the conveyor belt, an opening for the obstacle to pass through is provided on the side of the storage box close to the conveyor belt, a swing automatic door is provided at the bottom of the storage box, an ultrasonic sensor is provided in the storage box, which is used to sense whether there is an obstacle in the storage box, the swing automatic door is an existing equipment, which can be opened and closed automatically, or a telescopic cylinder is provided at the opening at the bottom of the storage box, a closing plate is connected to the telescopic cylinder, and the closing plate is driven to move by the telescopic cylinder to achieve the opening and closing effect. This is a conventional design and will not be described in detail.

[0017] Preferably according to the present invention, the obstacle includes a solid ball and a hollow ball, and the solid ball and the hollow ball are connected by a rope. The obstacle is designed as a solid ball and a hollow ball, which has two effects. First, the solid ball is heavy, which can ensure a smooth impact, and after the solid ball impacts into the water, it can drive the hollow ball to cause a larger range of fluctuations on the water surface. The solid ball and the hollow ball can perform two wave impacts. Second, during the obstacle impact process, the rope may be directly wrapped around the mooring chain, which can more realistically simulate the impact situation that the mooring chain may encounter. When in use, the conveyor belt uses a roller conveyor belt, which can better match the use of the obstacle. A rectangular through hole is provided on the side of the water tank facing the impact component to ensure that the obstacle enters the water tank.

[0018] Preferably according to the present invention, the water tank is connected to a water pump through a pipeline, a drain pipe is connected to the bottom of the water tank, a filter is arranged on the drain pipe, the filter is an existing commonly used filtering device, and a liquid sensor and a temperature sensor are arranged on the water tank.

[0019] The application of the above-mentioned mooring chain fatigue test device for stabilizing deep-sea ships is as follows:

[0020] (1) The water pump is started to pump water into the water tank, and then the mooring chain is hooked on the first hook and the second hook;

[0021] (2) The stretching member is activated, and the telescopic cylinder is used to drive the mooring chain to stretch and retract;

[0022] (3) The driving swing component starts, motor A rotates, and the crank and rocker are used to drive the swing arm to swing back and forth, thereby driving the mooring chain to swing;

[0023] (4) The impact component is started, the conveyor belt moves, and an obstacle is dropped into the storage box. The motor rotates, driving the rack plate to move through the half-toothed gear, and then driving the sliding rod and the launching rod to move in the opposite direction of the storage box. The spring is compressed, and the motor stops after rotating to the set stroke. At this time, the half-toothed gear and the rack plate are not out of contact. Then, the swing automatic door opens, and the obstacle falls into the slideway. The motor continues to rotate, and the half-toothed gear contacts the rack plate. Under the action of the spring elastic force, the launching rod impacts the obstacle, and the obstacle is dropped into the water tank, impacting the mooring chain;

[0024] (5) After the impact reaches the set number of times, motor B starts, and the first gear and the second gear are used to drive the rotating rod to rotate, thereby driving the slide to rotate, adjusting the impact angle, and then repeating step (4) to achieve multi-angle impact on the mooring chain.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention can apply various loads such as stretching, contraction, swinging, floating, etc. to the mooring chain, truly simulating the complex environment and stress state in the ocean, and ensuring the authenticity of the test data.

[0027] 2. The obstacles of the present invention are designed as solid balls and hollow balls, which have two effects. First, the solid balls are heavy, which can ensure smooth impact. Moreover, after the solid balls impact into the water, they can drive the hollow balls to cause larger fluctuations on the water surface. The solid balls and hollow balls can perform two wave impacts. Second, during the obstacle impact process, the rope may be directly wrapped around the mooring chain, which can more realistically simulate the impact conditions that the mooring chain may encounter. When in use, the conveyor belt uses a roller conveyor belt, which can better match the use of obstacles. A rectangular through hole is provided on the side of the water tank facing the impact component to ensure that the obstacle enters the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the top view of the structure of the present invention;

[0030] Figure 3It is a schematic diagram of a top view and cross-section structure of the present invention;

[0031] Figure 4 For the present invention Figure 1 A partial enlarged view of part A;

[0032] Figure 5 It is a schematic diagram of the structure of the impact component of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the transmitting assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the obstacle structure of the present invention.

[0035] Description of reference numerals:

[0036] 1. Water tank; 2. First hook; 3. Telescopic cylinder; 4. Second hook; 5. Swing rod; 6. Support tube; 7. Mounting seat; 8. Obstacle; 9. Rotating shaft; 10. Driving swing assembly; 11. Connecting shaft; 12. Motor A; 13. Bracket; 14. Rotating rod; 15. Slide; 16. Storage box; 17. Launching assembly; 18. Liquid sensor; 19. Temperature sensor; 20. Water pump; 21. First gear; 22. Second gear; 23. Drain pipe; 24. Filter; 25. Motor B;

[0037] 101. crank; 102. rocker;

[0038] 141. a first rod; 142. a second rod;

[0039] 161. conveyor belt; 162. ultrasonic sensor;

[0040] 171, sliding rod; 172, launching rod; 173, spring; 174, rack plate; 175, half-toothed gear; 176, motor; 177, launching frame; 178, support plate;

[0041] 1001. waist-shaped hole; 1002. sliding cavity; 1003. sliding ball. DETAILED DESCRIPTION

[0042] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings, but is not limited thereto.

[0043] Embodiment 1:

[0044] like Figure 1-Figure 7 As shown, this embodiment provides a mooring chain fatigue test device for stabilizing deep-sea ships, comprising a water tank 1, a tensile member, a driving pendulum member and an impact member, wherein the tensile member and the driving pendulum member are respectively arranged at both ends of the water tank 1, and an impact member is arranged on the ground at one side of the water tank 1;

[0045] The stretching member includes a telescopic cylinder 3 and a first hook 2. The telescopic cylinder 3 is fixedly arranged at one end of the water tank 1. The output end of the telescopic cylinder 3 extends into the water tank 1. The output end of the telescopic cylinder 3 is provided with the first hook 2.

[0046] The swing driving component includes a mounting seat 7, a rotating shaft 9, a swing rod 5, a second hook 4 and a swing driving assembly 10. The mounting seat 7 is fixedly arranged at the other end of the water tank 1. The rotating shaft 9 is arranged on the mounting seat 7 through a bearing. The swing rod 5 is arranged on the top of the rotating shaft 9 through a bearing. The other end of the swing rod 5 passes through the waist-shaped hole 1001 on the water tank 1 and extends to the inside of the water tank 1. The second hook 4 is fixedly arranged at the other end of the swing rod 5, and the swing driving assembly 10 is connected to the middle part of the swing rod 5.

[0047] The swing driving assembly 10 includes a motor A12, a connecting shaft 11, a crank 101 and a rocker 102. The motor A12 is arranged at the bottom of the mounting seat 7. The connecting shaft 11 is arranged on the output shaft of the motor A12. The connecting shaft 11 passes through the mounting seat 7 and is provided with a crank 101. The crank 101 is connected to a rocker 102. The other end of the rocker 102 is connected to a swing rod 5. The motor A12 is used to drive the connecting shaft 11 and the crank 101 to rotate, and then the swing rod 5 is driven to swing through the rocker 102.

[0048] A sliding cavity 1002 is embedded in the side wall of the water tank where the waist-shaped hole 1001 is located. A sliding ball 1003 is slidingly sleeved on the swing rod 5. The sliding ball 1003 is arranged in the sliding cavity 1002 to facilitate the swing rod 5 to swing back and forth in the waist-shaped hole 1001.

[0049] The impact component includes a bracket 13, a support tube 6, a rotating assembly, a slide 15, a launching assembly 17 and a delivery assembly. The bottom of the bracket 13 is set on the ground, and the upper side of the bracket 13 is connected to the slide 15 through the rotating assembly. The slide 15 is an L-shaped plate. The launching assembly 17 is arranged on the slide 15, and the delivery assembly is arranged on the upper side of the launching assembly 17. A support tube 6 is arranged between the bracket 13 and the slide 15. The bracket 13 is fixedly connected to the bottom of the support tube 6, and the slide 15 is slidably connected to the top. The inside of the support tube 6 is a rotating assembly, which can support the weight of the slide 15, the launching assembly 17 and the delivery assembly, and the slide can rotate circumferentially on the support tube without interfering with the slide 15.

[0050] The rotating assembly includes a rotating rod 14, a first gear 21, a second gear 22 and a motor B25. The rotating rod 14 includes a first rod member 141 and a second rod member 142. The first rod member 141 and the second rod member 142 are rotatably connected. The first rod member 141 is fixed to the bracket 13, the second rod member 142 is fixed to the slide 15, and the first gear 21 is fixedly provided on the second rod member 142. The motor B25 is supported on the bracket 13, and the second gear 22 is provided on the output shaft of the motor B25. The second gear 22 is meshed and connected with the first gear 21.

[0051] The launching assembly 17 includes a launching frame 177, a sliding rod 171, a launching rod 172, a spring 173, a rack plate 174, a half-toothed gear 175 and a motor 176. The slideway 15 is provided with a launching frame 177, which is a hollow rectangular parallelepiped. A launching rod 172 is arranged in the launching frame 177. One end of the launching rod 172 is connected to the sliding rod 171. One end of the sliding rod 171 passes through the launching frame 177 and the slideway 15 and is connected to the rack plate 174. A spring 173 is mounted on the sliding rod 171. One end of the spring 173 contacts the launching rod 172 and the other end contacts the slideway 15. A support plate 178 is fixedly arranged on one side of the slideway 15. The support plate 178 is provided with a motor 176. A half-toothed gear 175 is arranged on the output shaft of the motor 176. The half-toothed gear 175 is meshedly connected with the rack plate 174.

[0052] The delivery assembly includes a storage box 16, a conveyor belt 161 and an obstacle 8. The storage box 16 is fixed on the upper side of the launch frame 177. A conveyor belt 161 is fixedly provided on one side of the storage box 16. A plurality of obstacles 8 are provided on the conveyor belt 161. An opening for the obstacle 8 to pass through is provided on the side of the storage box 16 close to the conveyor belt 161. A swing automatic door is provided at the bottom of the storage box 16. An ultrasonic sensor 162 is provided in the storage box 16 for sensing whether there is an obstacle 8 in the storage box 16. The swing automatic door is an existing device that can be opened and closed automatically, or a telescopic cylinder is provided at the bottom opening of the storage box 16, and a closing plate is connected to the telescopic cylinder. The closing plate is driven to move by the telescopic cylinder to achieve the opening and closing effect. This is a conventional design and will not be described in detail.

[0053] The obstacle 8 includes a solid ball and a hollow ball, which are connected by a rope. The obstacle is designed as a solid ball and a hollow ball for two effects. First, the solid ball is heavy, which can ensure a smooth impact. Moreover, when the solid ball impacts the water, it can drive the hollow ball to cause a larger range of fluctuations on the water surface. The solid ball and the hollow ball can perform two wave impacts. Second, during the obstacle impact process, the rope may be directly wrapped around the mooring chain, which can more realistically simulate the impact situation that the mooring chain may encounter. When in use, the conveyor belt uses a roller conveyor belt, which can better match the use of the obstacle. A rectangular through hole is provided on the side of the water tank 1 facing the impact component to ensure that the obstacle enters the water tank.

[0054] The water tank 1 is connected to a water pump 20 through a pipeline. A drain pipe 23 is connected to the bottom of the water tank 1. A filter 24 is arranged on the drain pipe 23. The filter 24 is an existing commonly used filtering device. A liquid sensor 18 and a temperature sensor 19 are arranged on the water tank 1.

[0055] The application of the above-mentioned mooring chain fatigue test device for stabilizing deep-sea ships is as follows:

[0056] (1) The water pump 20 is started to pump water into the water tank 1, and then the mooring chain is hooked on the first hook 2 and the second hook 4;

[0057] (2) The stretching member is started, and the telescopic cylinder 3 is used to drive the mooring chain to stretch and retract;

[0058] (3) The driving swing component is started, the motor A12 rotates, and the crank 101 and the rocker 102 are used to drive the swing rod 5 to swing back and forth, thereby driving the mooring chain to swing;

[0059] (4) The impact component is started, the conveyor belt 161 moves, and an obstacle 8 is dropped into the storage box. The motor 176 rotates, and the rack plate 174 is driven to move through the half-toothed gear 175, thereby driving the sliding rod 171 and the firing rod 172 to move in the opposite direction of the storage box 16. The spring 173 is compressed, and the motor 176 stops after rotating to a set stroke. At this time, the half-toothed gear 175 is not out of contact with the rack plate 174. Then, the swing automatic door opens, and the obstacle 8 falls into the slide 15. The motor 176 continues to rotate, and the half-toothed gear 175 is in contact with the rack plate 174. Under the elastic force of the spring 173, the firing rod 172 impacts the obstacle 8, and the obstacle 8 is dropped into the water tank 1, impacting the mooring chain.

[0060] (5) After the impact reaches the set number of times, the motor B25 is started, and the first gear 21 and the second gear 22 are used to drive the rotating rod 14 to rotate, thereby driving the slide 15 to rotate, adjusting the impact angle, and then repeating step (4) to achieve multi-angle impact on the mooring chain.

[0061] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A fatigue test device for mooring chains used to stabilize deep-sea ships, characterized in that: It includes a water tank, a tensile member, a driving swing member and an impact member, wherein the tensile member and the driving swing member are respectively arranged at both ends of the water tank, and the impact member is arranged on the ground at one side of the water tank; The stretching member includes a telescopic cylinder and a first hook. The telescopic cylinder is fixedly arranged at one end of the water tank. The output end of the telescopic cylinder extends into the water tank. The output end of the telescopic cylinder is provided with a first hook. The swing-driving component includes a mounting seat, a rotating shaft, a swing rod, a second hook and a swing-driving assembly. The mounting seat is fixedly arranged at the other end of the water tank, the rotating shaft is arranged on the mounting seat, the swing rod is arranged on the top of the rotating shaft, the other end of the swing rod passes through the waist-shaped hole on the water tank and extends to the inside of the water tank, the other end of the swing rod is fixedly arranged with a second hook, and the middle part of the swing rod is connected with the swing-driving assembly; The swing driving assembly includes a motor A, a connecting shaft, a crank and a rocker. The motor A is arranged at the bottom of the mounting seat, the connecting shaft is arranged on the output shaft of the motor A, the connecting shaft passes through the mounting seat and is provided with a crank, the crank is connected to the rocker, and the other end of the rocker is connected to the swing rod; A sliding cavity is embedded in the side wall of the water tank where the waist-shaped hole is located, and a sliding ball is provided on the sliding sleeve of the swing rod, and the sliding ball is arranged in the sliding cavity; The impact component includes a bracket, a supporting tube, a rotating assembly, a slide, a launching assembly and a delivering assembly. The bottom of the bracket is set on the ground, the upper side of the bracket is connected to the slide through the rotating assembly, the slide is provided with a launching assembly, the upper side of the launching assembly is provided with a delivering assembly, a supporting tube is provided between the bracket and the slide, the bottom of the supporting tube is fixedly connected to the bracket, the top is slidably connected to the slide, and the inside of the supporting tube is the rotating assembly.

2. The mooring chain fatigue test device for stabilizing deep-sea ships according to claim 1, characterized in that: The rotating assembly includes a rotating rod, a first gear, a second gear and a motor B. The rotating rod includes a first rod member and a second rod member. The first rod member and the second rod member are rotatably connected. The first rod member is fixed to the bracket, the second rod member is fixed to the slide, and the first gear is fixed on the second rod member. The motor B is supported on the bracket, and a second gear is provided on the output shaft of the motor B. The second gear is meshed and connected with the first gear.

3. The mooring chain fatigue test device for stabilizing deep-sea ships according to claim 2, characterized in that: The launching assembly includes a launching frame, a sliding rod, a launching rod, a spring, a rack plate, a half-toothed gear and a motor. A launching frame is arranged on the slideway, a launching rod is arranged in the launching frame, one end of the launching rod is connected to the sliding rod, one end of the sliding rod passes through the launching frame and the slideway and is connected to the rack plate, a spring is mounted on the sliding rod, a support plate is fixedly arranged on one side of the slideway, a motor is arranged on the support plate, a half-toothed gear is arranged on the output shaft of the motor, and the rack plate is meshed with the half-toothed gear.

4. The mooring chain fatigue test device for stabilizing deep-sea ships according to claim 3, characterized in that: The delivery component includes a storage box, a conveyor belt and an obstacle. The storage box is fixed on the upper side of the launch frame. A conveyor belt is fixed on one side of the storage box, and an obstacle is arranged on the conveyor belt. An opening for the obstacle to pass through is arranged on the side of the storage box close to the conveyor belt. A swing automatic door is arranged at the bottom of the storage box, and an ultrasonic sensor is arranged inside the storage box.

5. The mooring chain fatigue test device for stabilizing deep-sea ships according to claim 4, characterized in that: The obstacles include solid balls and hollow balls, which are connected by ropes.

6. The mooring chain fatigue test device for stabilizing deep-sea ships according to claim 5, characterized in that: The water tank is connected to a water pump through a pipeline, a drain pipe is connected to the bottom of the water tank, a filter is arranged on the drain pipe, and a liquid sensor and a temperature sensor are arranged on the water tank.

7. The use of the mooring chain fatigue test device for stabilizing deep-sea ships according to claim 6, characterized in that: Here are the steps: (1) The water pump is started to pump water into the water tank, and then the mooring chain is hooked on the first hook and the second hook; (2) The stretching member is activated, and the telescopic cylinder is used to drive the mooring chain to stretch and retract; (3) The driving swing component starts, motor A rotates, and the crank and rocker are used to drive the swing arm to swing back and forth, thereby driving the mooring chain to swing; (4) The impact component is started, the conveyor belt moves, and an obstacle is dropped into the storage box. The motor rotates, driving the rack plate to move through the half-toothed gear, and then driving the sliding rod and the launching rod to move in the opposite direction of the storage box. The spring is compressed, and the motor stops after rotating to the set stroke. At this time, the half-toothed gear and the rack plate are not out of contact. Then, the swing automatic door opens, and the obstacle falls into the slideway. The motor continues to rotate, and the half-toothed gear contacts the rack plate. Under the action of the spring elastic force, the launching rod impacts the obstacle, and the obstacle is dropped into the water tank, impacting the mooring chain; (5) After the impact reaches the set number of times, motor B starts, and the first gear and the second gear are used to drive the rotating rod to rotate, thereby driving the slide to rotate, adjusting the impact angle, and then repeating step (4) to achieve multi-angle impact on the mooring chain.

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