Automatic starting device and test method for tank test of anti-sinking performance of damaged ship in still water

Abstract

The present invention discloses an automatic starting device and experimental method for a tank test on the anti-sinking property of a damaged ship in still water, which relates to the field of ships and marine engineering, and solves the problem of human operation affecting the experimental process and results and the precise positioning of the model. The present invention comprises a damaged ship model, a lifting bracket and a water pool, wherein the damaged ship model floats in the water pool, and a lifting bracket is suspended above the damaged ship model; a posture sensor unit and a remote control switch unit are provided on the damaged ship model, and the opening of the breach baffle is controlled by the posture sensor unit and the remote control switch unit to simulate the transient water inflow process after the ship is damaged in a real environment. The present invention realizes the precise positioning of the model before the experiment begins by using the lifting bracket; the posture sensor unit and the remote control switch unit replace human operation to simulate the transient water inflow process after the ship is damaged under real conditions, thereby avoiding the influence of human operation on the experiment caused by the floating state change of the model and the sloshing of the free liquid surface, as well as the opening of the breach.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding and marine engineering, and in particular to an automatic starting device and an experimental method for a still water tank test of the anti-sinking property of a damaged ship. Background Art

[0002] Ships navigating the ocean or inland rivers may collide or run aground, and military vessels may even be struck by weapons. These situations can damage the hull structure, causing water to enter the cabins, seriously affecting the ship's buoyancy and stability, and posing a significant threat to human life and property safety. Therefore, it is necessary to study the anti-sinking properties of ships. After a ship is damaged, the water inflow process, water inflow rate, cabin structural strength, and hull dynamic response must be immediately assessed to enable rapid and effective remedial measures or rescue plans. However, the anti-sinking properties of damaged ships involve highly nonlinear phenomena such as the rapid flow, turbulence, fragmentation, and splashing of water within the damaged cabins, as well as the coupling between the hull and the water flow, which pose significant challenges to theoretical and numerical simulation studies. Model experiments can effectively capture and record these phenomena. Therefore, model experiments are of great significance in studying the anti-sinking properties of damaged ships.

[0003] Furthermore, studying the sinking resistance of damaged vessels in a still-water environment offers a better opportunity to explore the mechanisms of sinking resistance. However, before conducting a model experiment on the sinking resistance of a damaged vessel in still water, external factors such as the model's buoyancy, sloshing of the free surface, and manipulations such as opening breaches significantly interfere with the repeatability and reliability of the experimental data, directly determining the success or failure of the experiment. However, existing experimental methods are significantly affected by human factors and are unable to effectively avoid these issues. Furthermore, they struggle to accurately simulate the transient flooding process of a damaged vessel. Summary of the Invention

[0004] In order to solve the problem that the existing experimental methods mentioned above are greatly affected by human factors, resulting in the inability to effectively avoid the interference of external factors such as the floating state of the model, the sloshing of the free liquid surface, and the operation of opening the breach on the experiment, and at the same time to achieve accurate positioning of the damaged ship model at the initial moment of the experiment, the present invention proposes an automatic starting device and experimental method for the anti-sinking tank experiment of a damaged ship in still water. The present invention replaces the traditional manual operation mode with the attitude sensor unit and the remote control switch unit, which can simulate the transient water inflow process after the ship is damaged under real environmental conditions, so that the influence of the model floating state change, free liquid surface sloshing, and the operation of opening the breach on the experiment caused by human operation is effectively avoided during the experiment, and the accurate positioning of the damaged ship model at the initial moment of the experiment is achieved by the provided lifting bracket.

[0005] The present invention proposes an automatically started damaged ship anti-sinking tank test device, which specifically includes a damaged ship model, a lifting bracket and a water pool, wherein the damaged ship model floats in the water pool, and a lifting bracket is suspended above the damaged ship model; the damaged ship model includes a baffle motor, a baffle remote control switch unit, a breach and a breach baffle, a breach is provided at the bottom of the damaged ship model, and the breach is sealed by the breach baffle; a baffle motor and a baffle remote control switch unit are provided on the deck of the damaged ship model, the baffle remote control switch unit controls the start and stop of the baffle motor, and the baffle motor controls the opening of the breach baffle; the lifting bracket includes a bracket body, a limiter motor, a limiter remote control switch unit and two limiters, the limiter motor and the limiter remote control switch unit are provided on the bracket body, and the limiter remote control switch unit controls the start and stop of the limiter motor; two limiters are movably installed on the lower surface of the bracket body; the limiter motor drives the two limiters; and the damaged ship model is located between the two limiters.

[0006] Furthermore, the damaged ship model also includes a baffle traction rope, which is arranged along the outer surface of the damaged ship model, with one end connected to the baffle motor output shaft and the other end connected to the broken baffle.

[0007] Furthermore, the length of the stopper is adapted to the width and floating height of the damaged ship model, and a distance is left between the stopper and the damaged ship model to ensure that there is no contact force between the stopper and the damaged ship model.

[0008] Furthermore, the bracket body includes a crossbeam structure and two vertical arms, and the lower ends of the two vertical arms are connected to the crossbeam structure; the crossbeam structure includes two crossbeams and three cross braces, and the two crossbeams are connected by three cross braces, and a limiter motor and a limiter remote control switch unit are provided on the middle cross brace.

[0009] Furthermore, the lifting bracket also includes two limiter traction ropes and two pulleys, the two pulleys are respectively arranged on the left and right cross braces, one end of the limiter traction rope is connected to the output shaft of the limiter motor, and the other end passes around the pulley and is connected to the limiter.

[0010] Furthermore, the lifting bracket also includes a plurality of bearings, and the limiter is installed on the bracket body through the plurality of bearings. The position of the bearings is adjustable, and is used to adjust the position of the limiter to adapt to damaged ship models of different scales.

[0011] Furthermore, the damaged ship model is also provided with a posture sensor unit for detecting the motion state of the damaged ship model and sending execution instructions to the baffle remote control switch unit and the limiter remote control switch unit.

[0012] Furthermore, the breach baffle is adapted to the shape of the breach.

[0013] Furthermore, the baffle traction rope and the limiter traction rope are lightweight nylon ropes.

[0014] An experimental method using the above-mentioned automatically activated damaged ship anti-sinking tank test device specifically includes the following experimental steps:

[0015] a. Release the baffle traction rope to the appropriate length, seal the breach with the breach baffle, and place the damaged ship model on the surface of the pool. Release the limiter traction rope to the appropriate length, lower the limiter to the designated position, and limit the position of the damaged ship model on the water surface.

[0016] b. Adjust the attitude sensor unit to the working state, power on the remote control switch unit, and wait until the water surface in the pool is calm. After the attitude sensor unit detects that the attitude of the damaged ship model remains stable for a specified period of time, the limiter remote control switch controls the limiter motor to rotate forward, raising the limiter.

[0017] c. After a specified delay, the attitude sensor unit controls the baffle motor to rotate forward through the baffle remote control switch unit, removing the breach baffle from the breach. The breach is opened, and the sinking resistance test of the damaged ship model begins.

[0018] d. After a specified period of time, the damaged ship model stops taking in water, the anti-sinking test is completed, the damaged ship model is salvaged, the water in the damaged ship model compartment is drained, and the limiter and breach baffle are reset.

[0019] The beneficial effects of the automatic starting device and test method for the still water damaged ship anti-sinking tank test of the present invention are:

[0020] (1) The automatic starting device and experimental method for the anti-sinking tank test of a damaged ship in still water described in the present invention overcome the influence of human operation on the experimental process and results. The attitude sensor unit and remote control switch unit provided can simulate the transient water inflow process of a damaged ship under real environmental conditions. The hull breach opening process of the present invention takes a time of 0.1 seconds, which can more realistically simulate the process of structural damage caused by collision, grounding or weapon attack during the navigation of the ship, providing a strong guarantee for studying the transient fluid-solid coupling problem in the process of water inflow during ship damage.

[0021] (2) The automatic starting device and experimental method for the anti-sinking tank test of a damaged ship in still water described in the present invention are such that at the beginning of the experiment, the damaged ship model is in a free upright floating state of complete hydrostatic balance at the designed draft. The gravity of the model itself is completely balanced by the buoyancy provided by the water. With the assistance of the attitude sensor and the limiter, the initial floating state of the damaged ship model in multiple experiments can be guaranteed, including a high degree of uniformity in the draft, longitudinal angle, heel angle, bow angle, floating position, etc. The limiter does not directly clamp the model when constraining the lateral displacement of the ship model, but leaves a gap of several millimeters between the model and the model, thereby realizing accurate positioning of the damaged ship model and effectively improving the repeatability of the experiment.

[0022] (3) The automatic starting device and experimental method for the still water damaged ship anti-sinking tank test of the present invention are fully automatic in the experimental starting process without any human operation, thereby avoiding the influence of any possible human factors on the experimental start-up process, reducing the randomness and uncertainty of the experimental start-up, thereby ensuring the success rate of the experiment and effectively improving the experimental efficiency;

[0023] (4) The automatic starting device and test method for the tank test of the damaged ship in still water described in the present invention are as follows: the hull breach is sealed by a breach baffle before the start of the test. This sealing method has the characteristics of being resistant to compression but not to tension, that is, the sealing and waterproof properties of the breach baffle will not be destroyed under the action of external water pressure, but under the traction of the towing rope, the breach baffle can be easily removed to expose the breach. These settings ensure that the model will not move before and during the opening of the breach;

[0024] (5) The automatic starting device and test method for the tank test of the damaged ship in still water described in the present invention are characterized by the provision of a breach baffle, a towing rope, etc., which are all made of lightweight materials. After the baffle is moved outward from the breach, the baffle and the towing rope will float in the water under the buoyancy of the water, thereby separating the baffle from the model. This will not generate external force interference in the gradual water entry process of the model. At the same time, the baffle will not enter the cabin of the damaged ship model, thereby avoiding the influence of the baffle on the flow field inside the cabin.

[0025] (6) The automatic starting device and experimental method for the tank test of the damaged ship in still water described in the present invention adopt the design of movable components such as bearings, limiters, and baffles, so that the present invention can be applied to damaged ship models of different sizes and damaged ship models with breaches of different sizes and positions, effectively improving the robustness of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] In the attached figure:

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0029] Figure 2 This is a schematic structural diagram of the automatically activated damaged ship anti-sinking tank test device of the present invention without the water tank;

[0030] Figure 3 This is a three-dimensional structural diagram of a lifting bracket of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0031] Figure 4 This is a front view of a lifting bracket for an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0032] Figure 5 It is a top view of the lifting bracket of the automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0033] Figure 6 This is a right side view of the lifting bracket of the automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0034] Figure 7 This is a three-dimensional structural diagram of the support body of the automatically activated damaged ship anti-sinking tank test device of the present invention;

[0035] Figure 8 It is a top view of the support body of the automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0036] Figure 9 This is a front view of the support body of the automatically activated damaged ship anti-sinking tank test device of the present invention;

[0037] Figure 10 This is a schematic structural diagram of a limiter of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0038] Figure 11 This is a front view of a limiter of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0039] Figure 12 This is a left view of a stopper of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0040] Figure 13 It is a structural schematic diagram of a damaged ship model of an automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0041] Figure 14 It is a right view of a damaged ship model of the automatically activated damaged ship anti-sinking tank test device according to the present invention;

[0042] Figure 15 This is a schematic diagram of the assembly of a baffle motor, a baffle traction rope, and a breach baffle of an automatically started damaged ship anti-sinking tank test device according to the present invention;

[0043] Among them: 1-damaged ship model, 2-attitude sensor unit, 3-motor, 3-1-baffle motor, 3-2-limiter motor, 4-remote control switch unit, 4-1-baffle remote control switch unit, 4-2-limiter remote control switch unit, 5-baffle traction rope, 6-break baffle, 7-winding reel, 7-1-baffle winding reel, 7-2-limiter winding reel, 8-limiter, 8-1-limiter body, 8-2-limiter shaft, 8-3-limiter buckle, 8-4-limiter tether hole, 9-limiter traction rope, 10-bracket body, 10-1-hoisting bracket crossbeam structure, 10-11-crossbeam, 10-12 cross brace, 10-2-hoisting bracket vertical arm, 10-21-column, 10-22 diagonal brace, 11-bearing, 12-pulley, 13-tank. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0045] Specific implementation method 1: See Figures 1-15 The present embodiment will be described in detail. The apparatus for automatically starting a damaged ship anti-sinking tank test in this embodiment specifically includes a damaged ship model 1, a hoisting bracket, and a tank 13. The damaged ship model 1 floats in the tank 13, and the hoisting bracket is suspended above the damaged ship model 1. A motor 3 and a remote control switch unit 4 are mounted on both the damaged ship model 1 and the hoisting bracket. The remote control switch unit 4 has an independent power supply that can operate independently and supply power to the motor 3. The remote control switch unit 4 can be used to control the operation of the motor 3 to conduct the experiment.

[0046] The damaged ship model 1 includes a baffle motor 3-1, a baffle remote control switch unit 4-1, a baffle traction rope 5, a breach and a breach baffle 6. A breach is provided at the bottom of the damaged ship model 1, and the breach is sealed by the breach baffle 6; a baffle motor 3-1 and a baffle remote control switch unit 4-1 are provided on the deck of the damaged ship model 1, and the baffle remote control switch unit 4-1 controls the start and stop of the baffle motor 3-1; a baffle winding drum 7-1 is installed on the output shaft of the baffle motor 3-1; the baffle traction rope 5 is arranged along the outer surface of the damaged ship model 1, one end of the baffle traction rope 5 is connected to the baffle winding drum 7-1, and the other end of the baffle traction rope 5 is connected to the breach baffle 6; the breach baffle 6 is adapted to the shape of the breach and is made of a lightweight material with a certain rigidity, so that after the breach baffle 6 is separated from the breach, the breach baffle 6 can float to the water surface and will not interfere with the gradual water inflow process of the damaged ship model 1.

[0047] The lifting bracket includes a bracket body 10, a limiter motor 3-2, a limiter remote control switch unit 4-2, two limiters 8 and two limiter traction ropes 9. The limiter motor 3-2 and the limiter remote control switch unit 4-2 are provided on the bracket body 10, and the limiter remote control switch unit 4-2 controls the start and stop of the limiter motor 3-2; two limiters 8 are movably installed on the lower surface of the bracket body 10; a limiter winding drum 7-2 is installed on the output shaft of the limiter motor 3-2; one end of the limiter traction rope 9 is connected to the limiter winding drum 7-2 on the output shaft of the limiter motor 3-2, and the other end of the limiter traction rope 9 is connected to the limiter 8; the damaged ship model 1 is located between the two limiters 8.

[0048] The length of the limiter 8 is adapted to the width and floating height of the damaged ship model 1, and a certain distance is left between the limiter 8 and the damaged ship model 1 so as not to clamp the damaged ship model 1. The limiter 8 comprises four limiter main structures 8-1, two limiter shafts 8-2, two limiter buckles 8-3 and a limiter tether hole 8-4. The four limiter main bodies 8-1 are connected to form a square structure. The two ends of the upper main structure 8-1 are connected to the limiter shafts 8-2. A limiter buckle 8-3 is installed at each end of the limiter shafts 8-2. A limiter tether hole 8-4 is installed in the middle of the outer surface of the lower limiter main structure 8-1.

[0049] The bracket body 10 includes a beam structure 10-1 and two vertical arms 10-2, and the lower ends of the two vertical arms 10-2 are connected to the beam structure 10-1; the beam structure 10-1 includes two beams 10-11 and three cross braces 10-12, and the two beams 10-11 are connected by the three cross braces 10-12, and the middle cross brace 10-12 is provided with a limiter motor 3-2 and a limiter remote control switch unit 4-2; the vertical arm (10-2) includes two columns 10-21 and a plurality of diagonal braces 10-22, and the two columns 10-21 are connected by the plurality of diagonal braces 10-22.

[0050] The hoisting bracket also includes two pulleys 12, which are respectively arranged on the inner surfaces of the left and right cross braces 10-12. One end of the limiter traction rope 9 is connected to the output shaft of the limiter motor 3-2, and the other end passes through the pulleys 12 and is connected to the limiter 8. The pulleys 12 change the direction of the pull force exerted by the limiter traction rope 9 on the limiter 8, allowing the limiter 8 to flip more smoothly. The installation position and layout of the pulleys 12 are adjusted according to the actual length of the limiter 8.

[0051] The lifting bracket also includes a number of bearings 11, which are installed on the lower surface of the beam 10-11. The limiter 8 is installed on the bracket body 10 through the cooperation of the limiter shaft 8-2 and the bearing 11. The limiter 8 can rotate around the central axis of the bearing 11. After the limiter shaft 8-2 passes through the bearing 11, a limiter buckle 8-3 is installed at the end to prevent the limiter 8 from accidentally falling off; the position of the bearing 11 on the beam 10-11 is adjustable, and the installation position and layout are adjusted according to the actual required position of the limiter 8.

[0052] The damaged ship model 1 also includes a posture sensor unit 2, which is arranged on the deck of the damaged ship model 1 to control the baffle remote control switch unit 4-1 and the limiter remote control switch unit 4-2; the posture sensor unit 2 has an independent power supply and can work independently, and the posture sensor unit 2 has a switch that can be manually operated to control its working state, standby state and shutdown state; the installation position and layout of the posture sensor unit 2, the baffle motor 3-1 and the baffle remote control switch unit 4-1 should be adapted to the upright floating state of the damaged ship model 1 when it is intact, to ensure that the balance of the damaged ship model 1 itself is not affected when it is intact and floating in the pool 13.

[0053] The baffle traction rope 5 and the limiter traction rope 9 are lightweight nylon ropes, which ensure that the baffle traction rope 5 can float to the water surface after the experiment starts and will not interfere with the gradual water inflow process of the damaged ship model 1.

[0054] An experimental method using the above-mentioned automatically activated damaged ship anti-sinking tank test device specifically includes the following experimental steps:

[0055] a. Release the baffle traction rope 5 to an appropriate length so that the breach baffle 6 reaches the breach position, thereby waterproofing the breach of the damaged ship model 1. The damaged ship model 1 is then placed in the pool 13, allowing it to float freely on the water surface. At the same time, release the limiter traction rope 9 to an appropriate length to lower the limiter 8 to the designated position, thereby limiting the drift of the damaged ship model 1 and keeping it in the center of the pool.

[0056] b. Adjust the attitude sensor unit 2 to the working state and energize the remote control switch unit 4. When the free water surface in the pool 13 is calm, the attitude sensor unit 2 detects that the attitude of the damaged ship model 1 remains stable within the specified time, and then sends a command to the limiter remote control switch unit 4-2. The limiter remote control switch 4-2 then controls the limiter motor 3-2 to rotate forward, lifting the limiter 8;

[0057] c. After a specified delay, the attitude sensor unit 2 sends a command to the baffle remote control switch unit 4-1, which then controls the baffle motor 3-1 to rotate forward, removing the baffle 6 from the breach. The breach is opened, and the sinking resistance test of the damaged ship model 1 begins;

[0058] d. After a specified period of time, the damaged ship model 1 stops taking in water, and the anti-sinking test ends. The model can be fished out of the pool 13, and the water in the damaged ship model 1 is drained. The attitude sensor unit 2 simultaneously sends instructions to the limiter remote control switch unit 4-2 and the baffle remote control switch unit 4-1 to reset the limiter 8 and the breach baffle 6.

[0059] The specific experimental process of the automatically started damaged ship anti-sinking tank test device described in the present invention is as follows:

[0060] Initially, the breach baffle 11 waterproofs and seals the breach of the damaged ship model 1, and the damaged ship model 1 floats freely on the free water surface in the pool 13. The limiters 8 are lowered to both sides of the damaged ship model 1 to limit the drift position of the damaged ship model 1 on the water surface. At this time, the two limiters 8 should leave gaps on both sides of the damaged ship model 1 and cannot directly contact the damaged ship model 1. In this way, the limiters 8 can ensure that the damaged ship model 1 remains in the center of the water surface and will not cause disturbances to the damaged ship model 1 during its subsequent folding process; at this time, the attitude sensor unit 2 is in working state and detects the motion state of the damaged ship model 1, including heaving motion, rolling motion and pitching motion; when the attitude sensor unit 2 detects that the motion state of the damaged ship model 1 tends to be stationary, that is, the amplitudes of the heave motion, roll motion, and pitch motion of the damaged ship model 1 are all less than the critical standard within a period of time. At this time, the free water surface in the pool 13 should also be calm; then, the attitude sensor unit 2 sends an instruction to the limiter remote control switch unit 4-2, and the limiter remote control switch unit 4-2 immediately controls the limiter motor 3-2 to rotate forward, and the limiter motor 3-2 drives the limiter winding drum 7-2 to rotate to retract the limiter traction rope 9, and then lift the limiter 8 to a certain height, so as to avoid the limiter 8 from contacting or colliding with the damaged ship model 1 during the subsequent experiment, thereby affecting the experiment.

[0061] Secondly, after a delay of 10 seconds, the attitude sensor unit 2 sends an instruction to the baffle remote control switch unit 4-1, and the baffle remote control switch unit 4-1 immediately controls the baffle motor 3-1 to rotate forward, and the baffle motor 3-1 drives the baffle winding drum 7-1 to rotate to retract the baffle traction rope 5, and then pull the broken baffle 6 away from the breach. At this time, the breach will be exposed, and the water in the pool 13 can flow into the interior of the cabin of the damaged ship model 1 through the breach, and the water inflow process begins.

[0062] Then, after a delay of 5 minutes, the water inflow process of the damaged ship model 1 is completed, the motion response of the model tends to be stable again, and the anti-sinking experiment is completed. The attitude sensor unit 2 sends instructions to the baffle remote control switch unit 4-1 and the limiter remote control switch unit 4-2 at the same time. The baffle remote control switch unit 4-1 and the limiter remote control switch unit 4-2 then control the baffle motor 3-1 and the limiter motor 3-2 to reverse respectively. The baffle motor 3-1 and the limiter motor 3-2 will respectively drive the baffle winding drum 7-1 and the limiter winding drum 7-2 to rotate to release the baffle traction rope 5 and the limiter traction rope 9, so that the baffle traction rope 5 returns to its initial length and the limiter 8 is reset.

[0063] Finally, the experimenter can salvage the damaged ship model 1 from the pool 13 and adjust the attitude sensor unit 2 to standby mode. The attitude sensor unit 2 will no longer detect the model movement or send instructions. The water in the cabin of the damaged ship model 1 is then drained into the pool 13, and the breach on the damaged ship model 1 is sealed again with the breach baffle 6, preparing for the next experiment.

[0064] Summarizing the above implementation cases, the automatic starting device and experimental method for the still water damaged ship anti-sinking tank test of the present invention overcome the influence of human operation on the experimental process and results. The provided attitude sensor unit 2 and remote control switch unit 4 can realize a realistic simulation of the transient water inflow process after the ship is damaged. The hull breach opening process of the present invention takes a time of the order of 0.1 seconds, which can more realistically simulate the process of structural damage caused by collision, grounding or weapon attack during the navigation of the ship, providing a strong guarantee for studying the transient fluid-solid coupling problem during the water inflow process of the damaged ship.

[0065] The automatic starting device and experimental method for the anti-sinking tank test of a damaged ship in still water described in the present invention are in a free positive floating state of complete hydrostatic balance at the designed draft at the beginning of the experiment. The gravity of the model itself is completely balanced by the buoyancy provided by the water, and with the assistance of the attitude sensor 2 and the limiter 8, the initial floating state of the damaged ship model 1 in multiple experiments, including the draft, longitudinal angle, heel angle, bow angle, floating position, etc., can be guaranteed to be highly uniform, which greatly improves the repeatability of the experiment; the set limiter 8 will not directly clamp the damaged ship model 1 when constraining the lateral drift displacement of the ship model, but will leave a gap of several millimeters between the model and the model, thereby realizing the accurate positioning of the damaged ship model 1 and effectively improving the repeatability of the experiment.

[0066] The automatic starting device and test method for the still water damaged ship anti-sinking tank test of the present invention are fully automatic in the test start-up process without any human operation. This method saves many human operation steps in existing test methods, avoids the influence of any possible human factors on the test start-up process, reduces the randomness and uncertainty of the test start-up, thereby ensuring the success rate of the test and effectively improving the test efficiency.

[0067] In the automatic starting device and test method for a tank test of the anti-sinking property of a damaged ship in still water disclosed herein, the breach in the hull is sealed by a breach baffle before the test begins. This sealing method is resistant to compression but not to tension, meaning that the baffle's sealing and waterproof properties remain intact under external water pressure. However, under the traction of a towing rope, the baffle can be easily removed, exposing the breach. These features ensure that the model will not move before and during the breach opening process.

[0068] In the automatic starting device and test method for a tank test of the anti-sinking property of a damaged ship in still water described in the present invention, the breach baffle, towing rope, etc. are all made of lightweight materials. After the baffle is removed from the breach, the baffle and towing rope will float in the water under the buoyancy of the water, ensuring that the breach baffle 6 is separated from the damaged ship model 1, without generating external force interference with the gradual water inflow process of the damaged ship model 1. At the same time, the breach baffle 6 will not enter the cabin of the damaged ship model 1, thereby avoiding the breach baffle 6 from affecting the flow field inside the cabin.

[0069] The automatic starting device and experimental method for the anti-sinking tank test of a damaged ship in still water described in the present invention adopt the design of movable components such as bearings 11, limiters 8, and breach baffles 6, so that the present invention can be applied to damaged ship models 1 of different sizes and damaged ship models 1 with breaches of different sizes and positions, effectively improving the robustness of the present invention.

[0070] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the invention. Reasonable combinations of the features described in the above embodiments are also possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An automatic starting device for a tank test of the anti-sinking performance of a damaged ship in still water, characterized by: It comprises a damaged ship model (1), a hoisting bracket and a pool (13), wherein the damaged ship model (1) floats in the pool (13), and a hoisting bracket is suspended above the damaged ship model (1); The damaged ship model (1) comprises a baffle motor (3-1), a baffle remote control switch unit (4-1), a breach and a breach baffle (6); a breach is provided at the bottom of the damaged ship model (1), and the breach is sealed by the breach baffle (6); a baffle motor (3-1) and a baffle remote control switch unit (4-1) are provided on the deck of the damaged ship model (1); the baffle remote control switch unit (4-1) controls the start and stop of the baffle motor (3-1), and the baffle motor (3-1) controls the opening of the breach baffle (6); The hoisting bracket comprises a bracket body (10), a limiter motor (3-2), a limiter remote control switch unit (4-2) and two limiters (8); the limiter motor (3-2) and the limiter remote control switch unit (4-2) are provided on the bracket body (10); the limiter remote control switch unit (4-2) controls the start and stop of the limiter motor (3-2); two limiters (8) are movably installed on the lower surface of the bracket body (10); the limiter motor (3-2) drives the two limiters (8); the damaged ship model (1) is located between the two limiters (8); The damaged ship model (1) further includes a baffle traction rope (5), which is arranged along the outer surface of the damaged ship model (1), one end of which is connected to the output shaft of the baffle motor (3-1), and the other end of which is connected to the breach baffle (6); The bracket body (10) comprises a crossbeam structure (10-1) and two vertical arms (10-2), the lower ends of the two vertical arms (10-2) being connected to the crossbeam structure (10-1); the crossbeam structure (10-1) comprises two crossbeams (10-11) and three cross braces (10-12), the two crossbeams (10-11) being connected via the three cross braces (10-12), and a limiter motor (3-2) and a limiter remote control switch unit (4-2) being provided on the middle cross brace (10-12); The hoisting bracket further includes two limiter traction ropes (9) and two pulleys (12), the two pulleys (12) being respectively arranged on the left and right cross braces (10-12), one end of the limiter traction rope (9) being connected to the output shaft of the limiter motor (3-2), and the other end passing around the pulley (12) and being connected to the limiter (8); The damaged ship model (1) is also provided with a posture sensor unit (2) for detecting the motion state of the damaged ship model (1) and sending execution instructions to the baffle remote control switch unit (4-1) and the limiter remote control switch unit (4-2).

2. The automatic starting device for the tank test of the damaged ship in still water according to claim 1 is characterized by: The length of the stopper (8) is adapted to the width and floating height of the damaged ship model (1), and a distance is left between the stopper (8) and the damaged ship model (1), ensuring that no contact force exists between the stopper (8) and the damaged ship model (1).

3. The automatic starting device for the tank test of the damaged ship in still water according to claim 1 is characterized by: The hoisting bracket further comprises a plurality of bearings (11), and the limiter (8) is mounted on the bracket body (10) via the plurality of bearings (11). The position of the bearings (11) is adjustable, and is used to adjust the position of the limiter (8) to suit damaged ship models (1) of different scales.

4. The automatic starting device for the tank test of the damaged ship in still water according to claim 1 is characterized by: The breach baffle (6) is adapted to the breach shape.

5. The automatic starting device for the tank test of the damaged ship in still water according to claim 1 is characterized by: The baffle traction rope (5) and the limiter traction rope (9) are lightweight nylon ropes.

6. A test method using the automatic starting device for testing the anti-sinking capacity of damaged ships in still water according to any one of claims 1 to 5, characterized in that: The specific steps include: a. Release the baffle traction rope (5) to an appropriate length, use the breach baffle (6) to waterproof the breach, and place the damaged ship model (1) on the surface of the pool (13); release the limiter traction rope (9) to an appropriate length, lower the limiter (8) to a designated position, and limit the position of the damaged ship model (1) drifting on the water surface; b. Adjust the attitude sensor unit (2) to the working state, power on the remote control switch unit, and wait until the water surface in the pool (13) is calm; after the attitude sensor unit (2) detects that the attitude of the damaged ship model (1) remains stable within the specified time, the limiter remote control switch unit (4-2) controls the limiter motor (3-2) to rotate forward, thereby lifting the limiter (8); c. After a specified delay, the attitude sensor unit (2) controls the baffle motor (3-1) to rotate forward through the baffle remote control switch unit (4-1), removing the breach baffle (6) from the breach, opening the breach, and starting the sinking resistance test of the damaged ship model (1); d. After a specified period of time, the damaged ship model (1) stops taking in water, the anti-sinking test ends, the damaged ship model (1) is salvaged, the water in the cabin of the damaged ship model (1) is drained, and the limiter (8) and the breach baffle (6) are reset.

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