Experimental system and method for high-speed supercavitating projectile attack on underwater target experiment

Abstract

An experimental system and method for testing underwater targets using high-speed supercavitating projectiles belong to the field of shipbuilding and marine engineering technology. This invention solves the problems of low experimental efficiency and reduced accuracy of test results associated with existing methods that involve manual underwater target adjustment. The system includes a water tank, a target, and a control device. The target is housed within the water tank, and the control device is mounted above the tank and slides along its length. The target includes a target plate, a mounting frame, a support, and a first base. The control device includes a second base, a turntable, a lower arm, an upper arm, a forearm, a grappling hook ball, and a grappling hook assembly. This experimental system fully utilizes the control device to capture and control underwater metal targets under identical conditions, thereby effectively improving experimental efficiency.

Description

Technical Field

[0001] This invention relates to an experimental system and method for testing high-speed supercavitating projectiles to strike underwater targets, belonging to the field of shipbuilding and marine engineering technology. Background Technology

[0002] Supercavitating projectiles are a special type of underwater moving object that utilizes the supercavitation phenomenon to reduce water resistance, thereby achieving high-speed movement and improving target penetration effectiveness. When a supercavitating projectile is launched from the air into water, it undergoes a transition from a gaseous to a liquid medium, leading to a series of complex physical phenomena, such as cavitation generation and pressure wave propagation. These phenomena involve multiple strongly nonlinear and multiphysics coupling problems, posing significant challenges to research. Experimentation is an important method for studying such problems, offering reliable and verifiable results and providing validation references for numerical simulation studies. However, current experiments on projectile penetration of underwater targets are limited, and related experimental techniques and methods are relatively lacking.

[0003] Because experiments involving high-speed, slender projectiles penetrating underwater targets require repeated replacement of the target plate and adjustment of its position (including horizontal, vertical, and angular positions), most existing experiments rely on manual underwater adjustments, especially in deep pools where water levels need to be constantly adjusted by pumping water in and out. Furthermore, the target's position can only be confirmed visually, leading to low experimental efficiency and severely impacting the study of damage characteristics in penetration tests. The process of manually replacing the target plate can alter water levels, air temperature, and the target's position, affecting the experimental results and ensuring the target is damaged as expected. Additionally, collisions between the target and its support can interfere with its position. If the target is manually adjusted, inaccurate movements can easily cause deflection of the penetration point, affecting the test results and even causing the projectile to deviate, resulting in penetration failure.

[0004] Therefore, there is an urgent need for an experimental system and method that is widely applicable, highly efficient and accurate, and reusable for testing high-speed supercavitating projectiles striking underwater targets. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems and provides an experimental system and method for testing high-speed supercavitating projectiles to strike underwater targets.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] An experimental system for testing the impact of a high-speed supercavitating projectile on an underwater target includes a water tank, a target, and a control device. The target is placed inside the water tank, and the control device is mounted above the water tank and slides along the length of the tank.

[0008] The target body includes a target plate, a mounting frame, a support, and a first base. The target plate is mounted in the mounting frame via knobs located on both sides. Adjusting the knobs allows for angle adjustment and fixation of the target plate relative to the mounting frame. The first base is fixed to the bottom of the water tank. The support and the first base are slidably connected via a first self-locking slide rail, which is arranged along the length of the water tank. The mounting frame and the support are slidably connected via a second self-locking slide rail, which is arranged along the height of the water tank.

[0009] The control device includes a second base, a turntable, a lower arm, an upper arm, a forearm, a hook ball, and a hook assembly. The turntable is rotatably mounted on the top of the second base. The bottom of the lower arm and the top of the turntable, as well as one end of the upper arm and the top of the lower arm, are rotatably connected. One end of the forearm is coaxially rotatably mounted on the other end of the upper arm. The hook ball is rotatably mounted on the other end of the forearm. The rotation axes of the hook ball relative to the forearm, the upper arm relative to the lower arm, and the lower arm relative to the turntable are all parallel to each other. An electric hoist is mounted on the upper arm. One end of the electric hoist's rope passes through the upper arm, the forearm, and the hook ball in sequence. The hook assembly is mounted on one end of the rope.

[0010] Furthermore, the support includes two main frame bodies arranged parallel to each other along the width direction of the water tank, and the bottom ends of the two main frame bodies are slidably connected to the first base via a first self-locking slide rail.

[0011] Furthermore, the mounting frame has an inverted U-shaped structure, the target plate is located inside the inverted U-shaped structure and both the target plate and the mounting frame are arranged along the width direction of the water tank, and the two sides of the target plate are connected to the U-shaped sidewalls of the mounting frame by corresponding knobs.

[0012] Furthermore, a telescopic adjustment assembly is provided between the top of the turntable and the middle of the lower arm.

[0013] Furthermore, the telescopic adjustment assembly includes a hydraulic cylinder and a connecting member, wherein the fixed end of the hydraulic cylinder is fixedly mounted on the top of the turntable, the movable end of the hydraulic cylinder is arranged obliquely upward, and the connecting member is fixedly mounted on the movable end of the hydraulic cylinder.

[0014] Furthermore, the turntable is connected to the second base via a threaded joint mechanism, and a motor is mounted on the turntable. The output shaft of the motor is connected to the central shaft at the bottom of the turntable via a gear pair.

[0015] Furthermore, the rope is wound and arranged inside the grappling hook ball.

[0016] Furthermore, neodymium iron boron magnets are installed inside the rope.

[0017] Furthermore, a support rod is fixedly installed at the lower part of the second base. The support rod is a bidirectional telescopic rod and is arranged along the width direction of the water tank.

[0018] A method for target capture and control using the above experimental system includes the following steps:

[0019] Step 1: Move the control device so that the grab hook assembly is directly above the mounting frame in the target body, and control the grab hook assembly to grab the mounting frame downwards;

[0020] Step 2: Use an electric hoist to control the rope retrieval, which will cause the mounting frame and the target plate on it to detach from the support along the second self-locking slide rail, thereby causing the target plate to leave the underwater environment.

[0021] Step 3: Rotate the turntable and / or move it along the length of the water tank to move the target to the outside of the water tank;

[0022] Step 4: By controlling the swing of the upper and lower arms, or by controlling the extension of the rope through the electric hoist, lower the mounting frame and the target plate on it to the ground, and remotely release the grab hook assembly.

[0023] Step 5: On the outside of the water tank, manually replace the target plate and mounting bracket or adjust the angle of the target plate as needed for the experiment.

[0024] Step Six: Control the hook assembly to grab the mounting frame from Step Five downwards. By controlling the swing of the upper and lower arms, or by controlling the rope retraction via the electric hoist, lift the mounting frame and the target plate on it.

[0025] Step 7: Rotate the turntable and / or move it along the length of the water tank to move the target above the support. By controlling the swing of the upper and lower arms, or by controlling the extension of the rope through the electric hoist, place the mounting frame and the target plate on it into the designated position along the second self-locking slide rail to complete the capture and control of the target plate.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The experimental system of the present invention can make full use of the control device to capture and control underwater metal targets under the same environment, thereby effectively improving experimental efficiency.

[0028] With the experimental system of this invention, when it is necessary to confirm the target status or update the target, the position of the target plate along the height and length directions of the water tank can be smoothly adjusted by setting the first self-locking slide rail and the second self-locking slide rail. The tilt angle of the target plate can be adjusted by the knob. The control device can smoothly hoist and grab the mounting frame and the target plate on it, increasing the stability of the target and reducing the collision intensity between the target and the support. This minimizes parameter perturbation of the metal target and external interference during the penetration process of the projectile, making it more flexible. The target position can be precisely controlled underwater, avoiding the phenomenon that errors caused by continuous pumping and releasing of water and moving the target affect the penetration process, and effectively improving the experimental accuracy.

[0029] The control device in the experimental system of this invention enables the height displacement adjustment and reversal of the target plate, thereby achieving the capture and placement of the target plate, as well as the angle adjustment of the target plate outside the water tank.

[0030] The experimental system of this invention is applicable to various high-speed underwater penetration tests, enabling the capture, replacement, and resetting of targets in underwater damage studies at different depths and orientations.

[0031] The experimental system of this invention can be used to conduct scientific research on the damage effects of any underwater weapon, and the size of the target can be adjusted by changing different grappling hook components.

[0032] The experimental system of this invention is safe and reliable, and can fully achieve the effect of capturing the target without affecting the target being damaged as expected. A single set of equipment can be reused repeatedly, resulting in low cost, safe and simple operation, compact structure, and suitability for various site applications, while effectively saving experimental costs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the experimental system for testing underwater targets using a high-speed supercavitating projectile (with the control device capturing the target).

[0034] Figure 2 This is a schematic diagram of the experimental system for testing underwater targets using a high-speed supercavitating projectile (with the control device moving the combination of the target plate and mounting frame out of the water tank).

[0035] Figure 3 This is a schematic diagram of the experimental system for testing underwater targets using a high-speed supercavitating projectile (after manually adjusting the target plate angle outside the water tank or replacing the target plate with a new one).

[0036] Figure 4 This is a schematic diagram of the first connection structure between the target plate and the mounting bracket.

[0037] Figure 5 This is a schematic diagram of the second connection structure between the target plate and the mounting bracket.

[0038] Figure 6 This is a structural schematic diagram of the bracket and the first base;

[0039] Figure 7 This is a three-dimensional structural diagram of the control device;

[0040] Figure 8 This is a schematic diagram of the second base.

[0041] In the picture:

[0042] 1. Water tank; 2. Target body; 2-1. Target plate; 2-2. Mounting frame; 2-3. Bracket; 2-31. First support rod; 2-32. Second support rod; 2-4. First base; 2-5. Knob; 3. Control device; 3-1. Second base; 3-1-1. Support; 3-1-2. Chassis; 3-1-3. Reinforcing rib; 3-2. Turntable; 3-3. Lower arm; 3-4. Upper arm; 3-5. Forearm; 3-6. Grappling hook ball; 3-7. Grappling hook assembly; 3-71. Grappling hook connecting rod; 3-72. Grappling hook rotation mechanism; 3-73. Grappling hook body; 3-8. Electric hoist; 3-81. Rope; 3-9. Connecting seat; 3-10. Telescopic adjustment assembly; 3-11. Support rod; 3-12. Motor; 4. Air cannon; 5. Projectile. Detailed Implementation

[0043] Specific implementation method one: Combining Figures 1-8 This description aims to clearly and completely illustrate the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this invention are defined based on the orientation or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] An experimental system for testing the impact of a high-speed supercavitating projectile on an underwater target includes a water tank 1, a target 2, and a control device 3. The target 2 is disposed inside the water tank 1, and the control device 3 is mounted above the water tank 1 and slides along the length of the water tank 1.

[0047] The target body 2 includes a target plate 2-1, a mounting frame 2-2, a support 2-3, and a first base 2-4. The target plate 2-1 is mounted in the mounting frame 2-2 via knobs 2-5 arranged on both sides. The angle of the target plate 2-1 relative to the mounting frame 2-2 can be adjusted and fixed by adjusting the knobs 2-5. The first base 2-4 is fixedly mounted to the bottom of the water tank 1. The support 2-3 and the first base 2-4 are slidably connected by a first self-locking slide rail, which is arranged along the length of the water tank 1. The mounting frame 2-2 and the support 2-3 are slidably connected by a second self-locking slide rail, which is arranged along the height of the water tank 1.

[0048] The control device 3 includes a second base 3-1, a turntable 3-2, a lower arm 3-3, an upper arm 3-4, a forearm 3-5, a hook ball 3-6, and a hook assembly 3-7. The turntable 3-2 is rotatably mounted on the top of the second base 3-1. The bottom of the lower arm 3-3 and the top of the turntable 3-2, as well as one end of the upper arm 3-4 and the top of the lower arm 3-3, are rotatably connected. One end of the forearm 3-5 is coaxially rotatably mounted on the other end of the upper arm 3-4. The hook ball 3-6... 6 is rotatably mounted on the other end of the forearm 3-5. The rotation axis of the hook ball 3-6 relative to the forearm 3-5, the rotation axis of the upper arm 3-4 relative to the lower arm 3-3, and the rotation axis of the lower arm 3-3 relative to the turntable 3-2 are all parallel to each other. An electric hoist 3-8 is mounted on the upper arm 3-4. One end of the rope 3-81 of the electric hoist 3-8 passes through the upper arm 3-4, the forearm 3-5, and the hook ball 3-6 in sequence. The hook assembly 3-7 is mounted on one end of the rope 3-81.

[0049] The rotation angle of the target plate 2-1 relative to the mounting bracket 2-2 is adjusted by adjusting knob 2-5. After adjusting to the desired angle, the position of the target plate 2-1 and the mounting bracket 2-2 is fixed by adjusting knob 2-5.

[0050] The first self-locking slide rail enables a sliding connection between the bracket 2-3 and the first base 2-4, and can self-lock when the bracket 2-3 slides to a predetermined position along the length of the water tank 1.

[0051] The second self-locking slide rail enables a sliding connection between the mounting bracket 2-2 and the support 2-3, and can self-lock when the mounting bracket 2-2 slides to a predetermined position along the height direction of the water tank 1.

[0052] The first and second self-locking slide rails used in this invention are conventional self-locking slide rails in the prior art, which have high practicality and strong durability. The specific structure of the self-locking slide rail is prior art and will not be described in detail here.

[0053] A third self-locking slide rail can be installed at the top of the water tank 1 to enable the control device 3 to slide along the length of the water tank 1.

[0054] The second base 3-1 includes a support 3-1-1 and a chassis 3-1-2. The bottom end of the chassis 3-1-2 is machined with a protrusion and external threads. The upper part of the support 3-1-1 is machined with a threaded hole, and the protrusion is threaded into the threaded hole, thereby realizing the threaded connection between the chassis 3-1-2 and the support 3-1-1, which effectively improves the structural stability of the second base 3-1 in the vertical direction.

[0055] Several reinforcing ribs 3-1-3 are welded to the outer side of the support 3-1-1 and the bottom end of the chassis 3-1-2, thereby effectively improving the horizontal stability of the second base 3-1.

[0056] The bottom of the lower arm 3-3 and the top of the turntable 3-2 are rotatably connected, as are one end of the upper arm 3-4 and the top of the lower arm 3-3. The rotation axes of the hook ball 3-6 relative to the forearm 3-5, the upper arm 3-4 relative to the lower arm 3-3, and the lower arm 3-3 relative to the turntable 3-2 are all parallel to each other, so as to realize the up-and-down swing of the lower arm 3-3, the angle adjustment between the upper arm 3-4 and the lower arm 3-3, and the angle adjustment between the hook ball 3-6 and the forearm 3-5, thereby realizing the position adjustment of the hook assembly 3-7 in the water tank 1.

[0057] The circumferential rotation of turntable 3-2 in the horizontal direction is driven by motor 3-12. The motor can be installed on turntable 3-2 or on the second base 3-1. The output shaft of motor 3-12 is connected to the bottom center shaft of turntable 3-2 through a gear transmission assembly, thereby realizing the circumferential rotation of turntable driven by motor in an eccentric arrangement with turntable.

[0058] The rotation structure between the upper arm 3-4 and the lower arm 3-3, and between the forearm 3-5 and the upper arm 3-4, can be achieved using the drive joints of existing conventional robotic arms.

[0059] A connecting seat 3-9 is fixedly mounted on the top of the turntable 3-2. The connecting seat 3-9 can be an irregular part. The bottom of the lower arm 3-3 is hinged to the connecting seat 3-9, thereby realizing the up and down swing of the lower arm 3-3.

[0060] The lower arm 3-3 includes an inner shell and an outer shell with the same edge dimensions, and the inner shell and the outer shell are welded and fixed together.

[0061] The upper arm 3-4, forearm 3-5 and grappling hook ball 3-6 are all hollow inside to facilitate the passage of rope 3-81.

[0062] Rope 3-81 is always vertically suspended. The rotation angle of the hook ball 3-6 relative to the forearm 3-5 depends on the vertical swing angle of the forearm 3-5. That is, regardless of how the forearm 3-5 swings, the outlet on the hook ball 3-6 for one end of rope 3-81 to pass through is always downward, thus keeping rope 3-81 and hook assembly 3-7 vertically suspended. The inclined rope 3-81 shown in the accompanying drawings is for illustrating the structural composition of the control mechanism and does not represent the position of rope 3-81 and hook assembly 3-7 in their working state.

[0063] The grab hook assembly 3-7 is existing technology, including a grab hook connecting rod 3-71, a grab hook rotating rod 3-72, and several grab hook bodies 3-73. The grab hook connecting rod 3-71 is fixed to the end of the rope 3-81. The grab hook rotating rod 3-72 is coaxially rotatably connected to the grab hook connecting rod 3-71, allowing the grab hook bodies 3-73 to adjust their angles more precisely. The top of the grab hook body 3-73 is fixed to the grab hook connecting rod 3-71 by a shaft. The opening and closing of multiple grab hook bodies 3-73 can be adjusted by remote control.

[0064] The installation process of the experimental system of this invention is as follows:

[0065] Install the turntable 3-2 on the second base 3-1, and install the motor 3-12 and hydraulic cylinder on the top of the turntable 3-2. Then, rotate the lower arm 3-3 onto the turntable 3-2. Then, install the upper arm 3-4, electric hoist 3-8, forearm 3-5 and hook ball 3-6 in sequence. Insert the end of the rope 3-81 from the forearm 3-5 into the hook ball 3-6, and then extend it out from the hook ball 3-6 to connect the hook assembly 3-7.

[0066] The air cannon 4 and projectile 5 used in the experiment of penetrating underwater targets with high-speed supercavitating projectiles were placed according to the actual experimental requirements.

[0067] The experimental system of the present invention can make full use of the control device 3 to capture and control the underwater metal target under the same environment, thereby effectively improving the experimental efficiency.

[0068] With the experimental system of the present invention, when it is necessary to confirm the status of the target 2 or update the target 2, the position of the target plate 2-1 along the height and length directions of the water tank 1 can be smoothly adjusted by setting the first self-locking slide rail and the second self-locking slide rail. The tilt angle of the target plate 2-1 can be adjusted by the knob 2-5. The control device 3 can smoothly hoist and grab the mounting frame 2-2 and the target plate 2-1 on it, increasing the stability of the target 2 and reducing the collision intensity between the target 2 and the support 2-3. This allows the projectile 5 to minimize parameter perturbation of the metal target and external interference during the penetration process, making it more flexible. The position of the target 2 can be precisely controlled underwater, avoiding the phenomenon that errors caused by continuous pumping and releasing of water and moving the target 2 affect the penetration process, and effectively improving the experimental accuracy.

[0069] The height displacement adjustment and reversal of the target plate 2-1 suspended by the control device 3 in the experimental system of the present invention are realized, thereby realizing the capture and placement of the target plate 2-1, and the angle adjustment of the target plate 2-1 outside the water tank 1.

[0070] The experimental system of this invention is applicable to various high-speed underwater penetration tests, enabling the capture, replacement, and resetting of the target 2 in underwater damage studies at different depths and orientations.

[0071] The experimental system of the present invention can be used to conduct scientific research on the damage effects of any underwater weapon. Different sizes of targets 2 can be controlled by changing different grappling hook components 3-7.

[0072] The experimental system of this invention is safe and reliable, and can fully achieve the effect of capturing the target 2 without affecting the expected damage to the target 2. One set of equipment can be reused repeatedly, with low cost, safe and simple operation, compact structure, and suitability for various site applications, while effectively saving experimental costs.

[0073] The lower arm 3-3, upper arm 3-4 and forearm 3-5 form the control arm. By controlling the parameter perturbation of each joint of the control arm and the grappling hook ball 3-6, the rope 3-81 and the grappling hook can reach the designated underwater position. In conjunction with the respective locking rails and steering knobs 2-5 on the target body 2, the target plate 2-1 can be captured, replaced and reset.

[0074] The support 2-3 includes two main frame bodies arranged parallel to each other along the width of the water tank 1, and the bottom ends of the two main frame bodies are slidably connected to the first base 2-4 via first self-locking slide rails. In this design, each main frame body preferably includes a vertically arranged first support rod 2-31 and a second support rod 2-32, wherein the first support rod 2-31 is vertically arranged, the second support rod 2-32 is inclined and its upper end is fixedly connected to the first support rod 2-31, and the bottom ends of both the first support rod 2-31 and the second support rod 2-32 are slidably connected to the first base 2-4 via first self-locking slide rails. The first base 2-4 is preferably a rectangular frame structure, and two first self-locking slide rails are fixedly mounted parallel to each other at the top of the first base 2-4 to achieve a sliding connection between the support 2-3 and the first base 2-4.

[0075] The mounting frame 2-2 has an inverted U-shaped structure. The target plate 2-1 is located inside the inverted U-shaped structure, and both the target plate 2-1 and the mounting frame 2-2 are arranged along the width direction of the water tank 1. The two sides of the target plate 2-1 are connected to the U-shaped sidewalls of the mounting frame 2-2 via knobs 2-5. This design, by setting the mounting frame 2-2 as an inverted U-shaped structure, facilitates the operation of the hook assembly 3-7 in grasping the target 2, ensuring a smooth grasping process and further guaranteeing the accuracy of the target 2 capture and placement operation.

[0076] A telescopic adjustment component 3-10 is provided between the top of the turntable 3-2 and the middle of the lower arm 3-3. With this design, the lower arm 3-3 can swing in the vertical direction by setting the telescopic adjustment component 3-10.

[0077] The telescopic adjustment assembly 3-10 includes a hydraulic cylinder and a connecting piece. The fixed end of the hydraulic cylinder is fixedly mounted on the top of the turntable 3-2, and the movable end of the hydraulic cylinder is arranged obliquely upward. The connecting piece is fixedly mounted on the movable end of the hydraulic cylinder. With this design, the middle part of the upper arm 3-4 is rotatably connected to the connecting piece. By controlling the extension and retraction of the movable end of the hydraulic cylinder, the lower arm 3-3 can swing around the bottom.

[0078] The turntable 3-2 is connected to the second base 3-1 by a threaded pair mechanism. A motor 3-12 is installed on the turntable 3-2, and the output shaft of the motor 3-12 is connected to the central shaft at the bottom of the turntable 3-2 by a gear pair.

[0079] Rope 3-81 is wound and arranged inside the grappling ball 3-6. This design provides storage space for rope 3-81 through the grappling ball 3-6.

[0080] Neodymium iron boron (NdFeB) magnet wire is installed inside rope 3-81. The rope has a common helical structure, and the magnet is made of iron wire with a diameter of about 4mm, positioned along the central axis of the rope helix. Its function is to enhance the gripping ability of underwater non-ferrous alloys. The length can be adjusted according to the mass and volume of the underwater object. Larger objects can be equipped with longer NdFeB magnets. Each magnetic point of this material has a load of over 10,000 Gauss, making it versatile and easy to use. A length of just a few centimeters is suitable for most experimental conditions. The material parameters of the NdFeB magnets used in this invention are shown in Table 1 below:

[0081]

[0082] Table 1

[0083] A support rod 3-11 is fixedly mounted on the lower part of the second base 3-1. The support rod 3-11 is a bidirectional telescopic rod and is arranged along the width direction of the water tank 1. With this design, the support rod 3-11 can be an automatically controlled bidirectional telescopic rod or a manually controlled telescopic rod. By controlling the extension and retraction of the support rod 3-11, the control device 3 can be adapted to water tanks 1 of different widths. Furthermore, according to actual experimental needs, by controlling the different bidirectional extension and retraction lengths of the support rod 3-11, the movement position of the grab hook assembly 3-7 along the width direction of the water tank 1 can be adjusted, thereby adapting to the capture of targets 2 at different positions.

[0084] A method for target capture and control using the above experimental system includes the following steps:

[0085] Step 1: Move the control device 3 so that the grab hook assembly 3-7 is directly above the mounting frame 2-2 in the target body 2, and control the grab hook assembly 3-7 to grab the mounting frame 2-2 downwards; control the rope 3-81 to extend through the electric hoist 3-8 until the grab hook assembly 3-7 reaches the grab position. Since the angle of the target plate 2-1 is adjusted according to experimental needs, it cannot be directly grabbed. However, because the target plate 2-1 is mounted on the mounting frame 2-2 via the knob 2-5, it can be grabbed by grabbing the mounting frame 2-2. Furthermore, since the mounting frame 2-2 and the support 2-3 are connected by a second self-locking slide rail, grabbing the mounting frame 2-2 effectively reduces friction and collision between the mounting frame 2-2 and the support 2-3 during the grabbing process, ensuring experimental accuracy.

[0086] Step 2: Control the rope 3-81 to retrieve the electric hoist 3-8, which will drive the mounting frame 2-2 and the target plate 2-1 on it to detach from the bracket 2-3 along the second self-locking slide rail, thereby driving the target plate 2-1 out of the underwater environment;

[0087] Step 3: Rotate turntable 3-2 and / or move it along the length of water tank 1 to move target 2 to the outside of water tank 1;

[0088] Step 4: By controlling the swing of the upper arm 3-4 and the lower arm 3-3, or by controlling the extension of the rope 3-81 through the electric hoist 3-8, the mounting frame 2-2 and the target plate 2-1 on it are placed on the ground, and the grab hook assembly 3-7 is released remotely.

[0089] Step 5: On the outside of water tank 1, manually replace the target plate 2-1 and the mounting bracket 2-2 or adjust the angle of the target plate 2-1 as needed for the experiment.

[0090] Step 6: Control the hook assembly 3-7 to capture the mounting frame 2-2 from Step 5 downwards. By controlling the swing of the upper arm 3-4 and the lower arm 3-3, or by controlling the retrieval of the rope 3-81 through the electric hoist 3-8, the mounting frame 2-2 and the target plate 2-1 on it are lifted up.

[0091] Step 7: Rotate turntable 3-2 and / or move it along the length of water tank 1 to move target 2 above bracket 2-3. By controlling the swing of upper arm 3-4 and lower arm 3-3, or by controlling the extension of rope 3-81 through electric hoist 3-8, place mounting frame 2-2 and target plate 2-1 on it along the second self-locking slide rail to the designated position to complete the capture and control of target plate 2-1.

[0092] In actual use, the experimental system of the present invention determines the dimensions of the rope 3-81 and the hook assembly 3-7 according to the geometric dimensions of the target plate 2-1 and the penetration position requirements.

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An experimental system for testing the impact of high-speed supercavitating projectiles on underwater targets, characterized in that: It includes a water tank (1), a target (2), and a control device (3), wherein the target (2) is installed inside the water tank (1), and the control device (3) is installed above the water tank (1) and slides along the length of the water tank (1). The target (2) includes a target plate (2-1), a mounting frame (2-2), a support (2-3), and a first base (2-4). The target plate (2-1) is mounted in the mounting frame (2-2) via knobs (2-5) arranged on both sides. The angle of the target plate (2-1) relative to the mounting frame (2-2) can be adjusted and fixed by adjusting the knobs (2-5). The first base (2-4) is fixedly mounted at the bottom of the water tank (1). The support (2-3) and the first base (2-4) are slidably connected by a first self-locking slide rail, which is arranged along the length of the water tank (1). The mounting frame (2-2) and the support (2-3) are slidably connected by a second self-locking slide rail, which is arranged along the height of the water tank (1). The control device (3) includes a second base (3-1), a turntable (3-2), a lower arm (3-3), an upper arm (3-4), a forearm (3-5), a hook ball (3-6), and a hook assembly (3-7). The turntable (3-2) is rotatably mounted on the top of the second base (3-1). The bottom of the lower arm (3-3) is rotatably connected to the top of the turntable (3-2), and one end of the upper arm (3-4) is rotatably connected to the top of the lower arm (3-3). One end of the forearm (3-5) is coaxially rotatably mounted on the other end of the upper arm (3-4). The hook ball (3-7)... 6) Rotatably mounted on the other end of the forearm (3-5), the rotation axis of the hook ball (3-6) relative to the forearm (3-5), the rotation axis of the upper arm (3-4) relative to the lower arm (3-3), and the rotation axis of the lower arm (3-3) relative to the turntable (3-2) are all set parallel to each other. An electric hoist (3-8) is mounted on the upper arm (3-4). One end of the rope (3-81) of the electric hoist (3-8) passes through the upper arm (3-4), the forearm (3-5), and the hook ball (3-6) in sequence. The hook assembly (3-7) is mounted on one end of the rope (3-81).

2. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 1, characterized in that: The bracket (2-3) includes two main frame bodies arranged parallel to each other along the width direction of the water tank (1), and the bottom ends of the two main frame bodies are slidably connected to the first base (2-4) through the first self-locking slide rail.

3. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 1 or 2, characterized in that: The mounting bracket (2-2) has an inverted U-shaped structure. The target plate (2-1) is located inside the inverted U-shaped structure and both the target plate (2-1) and the mounting bracket (2-2) are arranged along the width direction of the water tank (1). The two sides of the target plate (2-1) are connected to the U-shaped sidewall of the mounting bracket (2-2) by knobs (2-5).

4. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 1, characterized in that: A telescopic adjustment assembly (3-10) is provided between the top of the turntable (3-2) and the middle of the lower arm (3-3).

5. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 4, characterized in that: The telescopic adjustment assembly (3-10) includes a hydraulic cylinder and a connector, wherein the fixed end of the hydraulic cylinder is fixedly mounted on the top of the turntable (3-2), the movable end of the hydraulic cylinder is arranged obliquely upward, and the connector is fixedly mounted on the movable end of the hydraulic cylinder.

6. The experimental system for testing underwater targets with high-speed supercavitating projectiles according to claim 1, characterized in that: The turntable (3-2) is connected to the second base (3-1) by a threaded pair mechanism. A motor (3-12) is installed on the turntable (3-2), and the output shaft of the motor (3-12) is connected to the central shaft at the bottom of the turntable (3-2) by a gear pair.

7. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 1, characterized in that: The rope (3-81) is wrapped around the inside of the grappling ball (3-6).

8. The experimental system for testing underwater targets using high-speed supercavitating projectiles according to claim 1, characterized in that: The rope (3-81) is equipped with neodymium iron boron magnet wire.

9. The experimental system for testing underwater targets with high-speed supercavitating projectiles according to claim 1, characterized in that: The lower part of the second base (3-1) is fixed with a support rod (3-11), which is a bidirectional telescopic rod and is arranged along the width direction of the water tank (1).

10. A method for target capture and control using the experimental system described in any one of claims 1 to 9, characterized in that: Includes the following steps: Step 1: Move the control device (3) so that the hook assembly (3-7) is directly above the mounting frame (2-2) in the target body (2), and control the hook assembly (3-7) to grab the mounting frame (2-2) downwards; Step 2: Use the electric hoist (3-8) to control the rope (3-81) to retrieve the device, which will cause the mounting frame (2-2) and the target plate (2-1) on it to detach from the support (2-3) along the second self-locking slide rail, thereby causing the target plate (2-1) to leave the underwater environment. Step 3: Rotate the turntable (3-2) and / or move it along the length of the water tank (1) to move the target (2) to the outside of the water tank (1); Step 4: By controlling the swing of the upper arm (3-4) and lower arm (3-3), or by controlling the extension of the rope (3-81) through the electric hoist (3-8), the mounting frame (2-2) and the target plate (2-1) on it are placed on the ground, and the hook assembly (3-7) is released remotely. Step 5: On the outside of the water tank (1), manually replace the target plate (2-1) and the mounting bracket (2-2) or adjust the angle of the target plate (2-1) according to the experimental needs; Step 6: Control the hook assembly (3-7) to capture the mounting frame (2-2) from Step 5 downwards. By controlling the swing of the upper arm (3-4) and lower arm (3-3), or by controlling the retrieval of the rope (3-81) through the electric hoist (3-8), the mounting frame (2-2) and the target plate (2-1) on it are lifted up. Step 7: Rotate the turntable (3-2) and / or move it along the length of the water tank (1) to move the target (2) above the bracket (2-3). By controlling the swing of the upper arm (3-4) and the lower arm (3-3), or by controlling the extension of the rope (3-81) through the electric hoist (3-8), place the mounting frame (2-2) and the target plate (2-1) on it along the second self-locking slide rail to the designated position, thus completing the capture and control of the target plate (2-1).

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