A device and method for testing the impact toughness of thin-walled hulls of cross-media submersibles

Abstract

The present application belongs to the technical field of thin-walled shell impact toughness test, and particularly relates to a trans-medium underwater vehicle thin-walled shell impact toughness test device and method. The device comprises an underwater vehicle test piece, a test column, a guider, an accelerator, an accumulator and a test pool, wherein the guider is arranged between the test column and the test pool, the underwater vehicle test piece is suspended on the guider, the accelerator and the accumulator are arranged on the test column, the tail of the underwater vehicle test piece is connected with the accumulator, the bow is connected with the accelerator, the underwater vehicle test piece is connected with the accumulator and the accelerator through an explosion hanger, the accumulator is used for accumulating gravitational potential energy of the underwater vehicle test piece and the accelerator, and the accelerator provides a downward water-impact acceleration for the underwater vehicle test piece. The present application effectively controls the water-impact angle by using the guider, effectively controls the water-impact kinetic energy of the aircraft by using the accumulator and the accelerator, and effectively controls the cost.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of thin-walled shell impact toughness test, and particularly relates to a thin-walled shell impact toughness test device and method for a trans-medium underwater vehicle. BACKGROUND

[0002] With the development of aviation industry technology in various countries, the world's major aviation powers have increasingly high requirements for existing aviation aircraft, and the traditional single-medium aircraft cannot meet the actual demand, so the research on trans-medium aircraft that can adapt to various medium environments has become one of the important development directions of various aviation industry powers. The trans-medium aircraft can cross different media multiple times, combines the advantages of aerial vehicles and underwater vehicles, generates fluid load in medium crossing, and makes the structure experience a harsh mechanical environment. At present, the impact toughness load research on the trans-medium aircraft is still a new field, and the research is less.

[0003] At present, the fluid mechanics calculation state quantity is limited, and the modeling process requires a long time, the calculation process costs a lot of time and high cost, and often needs a supercomputer to be implemented, which is not conducive to the application in engineering and the rapid prediction of the load at other states. In addition, the physical test cost is too high, especially the expensive power system. The lightweight of the thin-walled shell of the trans-medium underwater vehicle is a key link factor for improving the performance of the whole aircraft in the medium crossing process, but the impact toughness of the thin-walled shell of the trans-medium underwater vehicle is also a factor restricting the design of the trans-medium underwater vehicle. How to test and judge the lightweight and impact toughness is the core index of engineering success or failure. Therefore, in the medium crossing process, improving the water impact toughness of the aircraft is a technical problem to be solved at present. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a trans-medium underwater vehicle thin-walled shell impact toughness test device and method, so as to realize the purpose of improving the water impact toughness of the aircraft in the medium crossing process.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The application provides a cross-medium underwater vehicle thin-wall shell impact toughness test device, which comprises an underwater vehicle test piece, a test column, a guide, an accelerator, an accumulator and a test pool.

[0007] In a possible implementation, the accelerator comprises an acceleration driving rope, a pool fixed pulley, a fixed pulley fixing beam, a pulley block and a weight, the pool fixed pulley is arranged at the inner bottom of the test pool, the fixed pulley fixing beam is arranged at the upper end of the test column, the pulley block is arranged on the fixed pulley fixing beam and the weight, one end of the acceleration driving rope is connected with the bow of the underwater vehicle test piece, and the other end of the acceleration driving rope is fixed on the fixed pulley fixing beam after passing through the pool fixed pulley and the pulley block in sequence.

[0008] In a possible implementation, the pulley block comprises a first fixed pulley, a first movable pulley, a second fixed pulley and a second movable pulley, the first fixed pulley and the second fixed pulley are arranged on the fixed pulley fixing beam, the first movable pulley and the second movable pulley are arranged on the weight, and the acceleration driving rope passes through the first fixed pulley, the first movable pulley, the second fixed pulley and the second movable pulley in sequence.

[0009] In a possible implementation, the accelerator further comprises a height stroke control block arranged below the weight at a set distance, and the height stroke control of the weight is realized by controlling the distance between the weight and the height stroke control block.

[0010] In a possible implementation, the guide comprises a guide rope assembly and a suspension rope assembly, the guide rope assembly is arranged on the outer side of the underwater vehicle test piece in a circumferential direction, and two ends of the guide rope assembly are connected with the test column and the bottom of the test pool away from the test column respectively, the guide rope assembly is connected with the explosion hanger ring on the underwater vehicle test piece through the suspension rope assembly, and the suspension rope assembly can slide relative to the guide rope assembly.

[0011] In a possible implementation, the guide rope assembly comprises a first guide rope, a second guide rope and a third guide rope, the first guide rope is located above the underwater vehicle test piece, and the second guide rope and the third guide rope are arranged on the left side and the right side of the underwater vehicle test piece respectively.

[0012] In a possible implementation, the suspension cable assembly comprises a front suspension cable, a rear suspension cable, a left guide suspension cable and a right guide suspension cable, wherein the front suspension cable and the rear suspension cable are connected to the explosion hangers at the top of the bow and the stern of the submarine test piece respectively, and the ends of the front suspension cable and the rear suspension cable are connected to the first guide cable through a slip ring; the left guide suspension cable and the right guide suspension cable are connected to the explosion hangers at the left and right sides of the stern of the submarine test piece respectively, and the ends of the left guide suspension cable and the right guide suspension cable are connected to the second guide cable and the third guide cable through a slip ring respectively.

[0013] In a possible implementation, the energy accumulator is a hoist, which comprises a starting explosion hanger, a front end cable, a hoist moving end, a hoist stationary end and a rear end cable, wherein the starting explosion hanger is arranged at the rear end of the stern of the submarine test piece, the hoist moving end is locked to the starting explosion hanger through the front end cable, and the hoist stationary end is locked to the upper end of the test column through the rear end cable.

[0014] In a possible implementation, the submarine test piece comprises a submarine thin-wall shell, a simulation head, a pipe, a front profiling plate, a rear profiling plate, a pressing plate and a plurality of weight sleeves, wherein one end of the pipe is connected to the simulation head through the front profiling plate, the other end of the pipe passes through the submarine thin-wall shell and is connected to the rear profiling plate through the pressing plate, the simulation head and the rear profiling plate abut the front and rear end faces of the submarine thin-wall shell respectively, the plurality of weight sleeves are arranged in the pipe in sequence in the axial direction, and the thickness and the length of the plurality of weight sleeves are different.

[0015] In a possible implementation, the front profiling plate is annular and is fixed to the outer circumference of one end of the pipe, and the outer circumference of the front profiling plate is in sliding fit with the mounting hole at the front end of the submarine test piece; the other end of the pipe is provided with a transition flange, and the pressing plate, the transition flange and the rear profiling plate are fixedly connected through bolts.

[0016] Another aspect of the present application provides a test method of the cross-medium submarine thin-wall shell impact toughness test device as described above, which comprises the following steps:

[0017] Step S1: installing the submarine test piece on the guider;

[0018] Step S2: connecting the stern of the submarine test piece to the energy accumulator;

[0019] Step S3: connecting the bow of the submarine test piece to the accelerator;

[0020] Step S4: artificially accumulating energy of the energy accumulator, so as to accumulate gravitational potential energy of the submarine test piece and the accelerator;

[0021] Step S5: the test control system triggers the explosion of the hanger ring of the energy accumulator, the accelerator accelerates the underwater vehicle test piece to move downward along the guide at a set attack angle and a set kinetic energy; when the underwater vehicle test piece reaches above the test pool, the test control system triggers the explosion of the hanger ring of the guide, the underwater vehicle test piece is separated from the guide and rushes into the test pool;

[0022] Step S6: the initial state of the test equipment is restored;

[0023] Step S7: the impact toughness of the underwater vehicle test piece is evaluated.

[0024] The present application has the advantages and beneficial effects that the present application provides a cross-medium underwater vehicle thin-wall shell impact toughness test device, the guide is used to effectively control the water-attack angle, the energy accumulator and the accelerator are used to effectively control the water-attack kinetic energy of the aircraft, and the cost is effectively controlled.

[0025] The present application provides a cross-medium underwater vehicle thin-wall shell impact toughness test method, the guide is used to effectively control the water-attack angle, the energy accumulator and the accelerator are used to effectively control the water-attack kinetic energy of the aircraft, the lightweight and impact toughness test evaluation are completed, the lightweight of the cross-medium underwater vehicle thin-wall shell is realized, and the performance of the aircraft in the overall quality crossing process is improved.

[0026] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description and the accompanying drawings.

[0027] The technical solutions of the present application will be further described in detail below with the help of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0029] Figure 1 is an isometric view of the cross-medium underwater vehicle thin-wall shell impact toughness test device of the present application;

[0030] Figure 2 is a partial view of A of Figure 1

[0031] Figure 3 is a partial view of B of Figure 2

[0032] Figure 4 ​​A side view of the impact toughness test device for the thin-wall shell of the cross-medium underwater vehicle of the present application;

[0033] Figure 5 A partial view at C of Figure 4 A partial view at D of

[0034] Figure 6 A schematic view of the connection between the underwater vehicle test piece and the guide in the embodiment of the present application;

[0035] Figure 7 A schematic view of the structure of the underwater vehicle test piece in the embodiment of the present application;

[0036] Figure 8 A partial view at D of Figure 7 A partial view at E of

[0037] Figure 9 A partial view at E of Figure 7 .

[0038] In the figure: 1 - underwater vehicle test piece, 101 - thin-wall shell of the underwater vehicle, 102 - simulation head, 103 - tube, 104 - front profiling plate, 105 - rear profiling plate, 106 - transition flange, 107 - pressing plate, 108 - counterweight sleeve, 109 - weld, 110 - convex profiling curved surface, 111 - profiling stepped surface, 2 - test column, 3 - guide, 301 - first guide cable, 302 - second guide cable, 303 - third guide cable, 304 - first pool anchoring position, 305 - second pool anchoring position, 306 - third pool anchoring position, 310 - front suspension cable, 311 - rear suspension cable, 312 - left side guide suspension cable, 313 - right side guide suspension cable, 4 - accelerator, 401 - acceleration driving cable, 402 - pool fixed pulley, 403 - fixed pulley fixed beam, 404 - first fixed pulley, 405 - first movable pulley, 406 - second fixed pulley, 407 - second movable pulley, 408 - weight, 409 - height stroke control block, 5 - energy accumulator, 501 - starting explosion lifting ring, 502 - front end cable, 503 - hand-operated hoist moving end, 504 - hand-operated hoist stationary end, 505 - rear end cable, 6 - test pool, 7 - experimental base. DETAILED DESCRIPTION

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which it is understood that the preferred embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0041] An embodiment of the present application provides a kind of trans-medium submarine vehicle thin-wall shell impact toughness test device, aiming at the water impact load of trans-medium aircraft, to improve the purpose of water impact toughness that aircraft is subjected to in the process of crossing medium. Participate Figures 1 to 9 As shown in the figure, the trans-medium submarine vehicle thin-wall shell impact toughness test device includes submarine test piece 1, test column 2, guider 3, accelerator 4, accumulator 5 and test pool 6, wherein test column 2 is arranged outside test pool 6, guider 3 is arranged between test column 2 and test pool 6, submarine test piece 1 is suspended on guider 3, guider 3 provides guidance for the downward movement of submarine test piece 1, accelerator 4 and accumulator 5 are both arranged on test column 2, the stern of submarine test piece 1 is connected with accumulator 5, and the bow is connected with accelerator 4, submarine test piece 1 is connected with accumulator 5 and accelerator 4 through explosion hanger, and accumulator 5 is used to accumulate the gravitational potential energy of submarine test piece 1 and accelerator 4; when accumulator 5 releases submarine test piece 1, accelerator 4 provides downward acceleration for submarine test piece 1, guider 3 provides spatial movement guidance for submarine test piece 1, and controls the attitude of submarine test piece 1 when crossing medium from air to water; when submarine test piece 1 reaches above test pool 6, guider 3 is separated from submarine test piece 1, so that submarine test piece 1 rushes into test pool 6.

[0042] As shown in Figure 1 and Figure 4 In the embodiment of the present application, test column 2 and test pool 6 are both arranged on experimental base 7, test column 2 is used to install accelerator 4 and accumulator 5, and test pool 6 is used for impact toughness test of submarine test piece 1.

[0043] As shown in Figure 3 In the embodiment of the present application, accumulator 5 is a hand-operated hoist, which includes starting explosion hanger 501, front end rope 502, hand-operated hoist moving end 503, hand-operated hoist stationary end 504 and rear end rope 505, wherein starting explosion hanger 501 is fixed at the rear end of the stern of submarine test piece 1, and hand-operated hoist moving end 503 is locked with starting explosion hanger 501 through front end rope 502. Hand-operated hoist stationary end 504 is locked with the upper end of test column 2 through rear end rope 505.

[0044] As shown in Figure 2 and Figure 5As shown, in the embodiment of the present application, the accelerator 4 comprises an acceleration driving rope 401, a pool fixed pulley 402, a fixed pulley fixing beam 403, a pulley block and a weight 408, wherein the pool fixed pulley 402 is arranged at the bottom of the inner side of the end of the test pool 6 away from the test column 2, the fixed pulley fixing beam 403 is arranged at the upper end of the test column 2, the pulley block is arranged on the fixed pulley fixing beam 403 and the weight 408, one end of the acceleration driving rope 401 is connected with the bow of the underwater vehicle test piece 1, and the other end is fixed on the fixed pulley fixing beam 403 after passing through the pool fixed pulley 402 and the pulley block in sequence.

[0045] Further, by adjusting the installation position of the pool fixed pulley 402 and the bottom of the test pool 6, the inclination angle of the acceleration driving rope 401 and the ground plane is changed.

[0046] Specifically, the pulley block comprises a first fixed pulley 404, a first movable pulley 405, a second fixed pulley 406 and a second movable pulley 407, wherein the first fixed pulley 404 and the second fixed pulley 406 are arranged on the fixed pulley fixing beam 403, the first movable pulley 405 and the second movable pulley 407 are arranged on the weight 408, and the acceleration driving rope 401 passes through the first fixed pulley 404, the first movable pulley 405, the second fixed pulley 406 and the second movable pulley 407 in sequence. Specifically, the number of movable pulleys and fixed pulleys in the pulley block can be adjusted according to the test requirements.

[0047] Further, the accelerator 4 further comprises a height stroke control block 409 arranged below the weight 408 at a set distance, and the height stroke control block 409 is arranged on the experimental base 7, so as to realize the height stroke control of the weight 408 by controlling the distance between the weight 408 and the height stroke control block 409. Specifically, the height stroke control is realized by using height stroke control blocks 409 of different heights, that is, the falling height of the weight 408 is controlled.

[0048] In the embodiment of the present application, the guider 3 comprises a guide rope assembly and a suspension rope assembly, wherein the guide rope assembly is arranged on the outer side of the underwater vehicle test piece 1 in the circumferential direction, and the two ends are respectively connected with the test column 2 and the bottom of the end of the test pool 6 away from the test column 2; the guide rope assembly is connected with the explosion lifting ring on the underwater vehicle test piece 1 through the suspension rope assembly, and the suspension rope assembly can slide relative to the guide rope assembly.

[0049] Referring to Figure 2 and Figure 6As shown, in the embodiment of the present application, the guide cable assembly comprises a first guide cable 301, a second guide cable 302 and a third guide cable 303, wherein the first guide cable 301 is located above the underwater vehicle test piece 1, the second guide cable 302 and the third guide cable 303 are respectively arranged on the left side and the right side of the underwater vehicle test piece 1; the first guide cable 301, the second guide cable 302 and the third guide cable 303 are arranged in parallel and form an angle of attack with the horizontal plane, the upper ends of the guide cables are respectively fixed at different positions of the test column 2, and the lower ends of the guide cables are respectively anchored on the first pool anchoring position 304, the second pool anchoring position 305 and the third pool anchoring position 306 provided on the bottom of the test pool 6. Specifically, a plurality of first pool anchoring positions 304, second pool anchoring positions 305 and third pool anchoring positions 306 are provided, so as to adjust the inclination angle of each guide cable and realize the adjustment of the angle of attack of the underwater vehicle test piece 1.

[0050] In the embodiment of the present application, the suspension cable assembly comprises a front suspension cable 310, a rear suspension cable 311, a left side guide suspension cable 312 and a right side guide suspension cable 313, wherein the front suspension cable 310 and the rear suspension cable 311 are respectively connected to the explosion hangers on the bow top and the stern top of the underwater vehicle test piece 1, and the ends of the front suspension cable 310 and the rear suspension cable 311 are respectively connected to the first guide cable 301 through the slip rings; the left side guide suspension cable 312 and the right side guide suspension cable 313 are respectively connected to the explosion hangers on the left side and the right side of the stern of the underwater vehicle test piece 1, and the ends of the left side guide suspension cable 312 and the right side guide suspension cable 313 are respectively connected to the second guide cable 302 and the third guide cable 303 through the slip rings.

[0051] Preferably, all guide cables and suspension cables are steel wires and are used in a nearly straight state. When the head of the underwater vehicle test piece 1 approaches the upper surface of the test pool 6, the four explosion hangers connected to the guide 3 are detonated, and then the guide 3 completes its guiding function without affecting the impact toughness test.

[0052] Referring to Figures 7 to 9 As shown, in the embodiment of the present application, the underwater vehicle test piece 1 comprises an underwater vehicle thin-walled shell 101, a simulation head 102, a pipe 103, a front profiling plate 104, a rear profiling plate 105, a pressing plate 107 and a plurality of counterweight sleeves 108, wherein one end of the pipe 103 is connected to the simulation head 102 through the front profiling plate 104, the other end of the pipe 103 passes through the underwater vehicle thin-walled shell 101 and is connected to the rear profiling plate 105 through the pressing plate 107, the simulation head 102 and the rear profiling plate 105 abut the front and rear end faces of the underwater vehicle thin-walled shell 101 respectively, and the plurality of counterweight sleeves 108 are arranged in the pipe 103 in sequence along the axial direction, and the thickness and length of the plurality of counterweight sleeves 108 are different.

[0053] Specifically, the front profiling plate 104 is circular and is welded on the outer circumference of one end of the pipe 103, the front profiling plate 104 is fixedly connected with the simulation head 102 through screws, and the outer circumference of the front profiling plate 104 is in sliding fit with the mounting hole at the front end of the submarine test piece 1. The other end of the pipe 103 penetrates through the rear profiling plate 105, and the end is welded with the transition flange 106 through a weld 109, so the pipe 103, the front profiling plate 104 and the transition flange 106 are one-time-use test pieces. The pressing plate 107, the transition flange 106 and the rear profiling plate 105 are fixedly connected through bolts. The profiling plate 105 is a stepped profiling structure, has a convex profiling curved surface 110 and a profiling stepped surface 111, the convex profiling curved surface 110 is in profiling abutment with the rear hole of the submarine thin-walled shell 101 and forms a front-rear linear movement pair, and the profiling stepped surface 111 is in abutment with the rear end surface of the submarine thin-walled shell 101. Specifically, the submarine thin-walled shell 101 is made of aviation large-size aluminum material.

[0054] Specifically, a plurality of weight sleeves 108 are inserted into the pipe 103, the outer diameters of each weight sleeve 108 are the same, and the inner diameters and lengths are different. The purpose of the weight sleeves 108 is to make the center of gravity and mass of the submarine test piece 1 consistent with those of the submarine before entering the water, the frontmost one of the plurality of weight sleeves 108 is in abutment with the simulation head 102, the frontmost and the last one are in abutment with each other, and the outer wall of the weight sleeve 108 is in abutment with the inner wall of the pipe 103. The pressing plate 107 is in abutment with the last surface of the last weight sleeve 108.

[0055] In the embodiment of the present application, the pulley block can effectively increase the falling speed of the weight 408, and give the submarine test piece 1 a speed before entering the water. The weight 408 is released from a high point, and the gravitational potential energy of the weight 408 is converted into the kinetic energy of the weight 408 and the submarine test piece 1. The speed of the weight 408 is accelerated from zero to the falling speed V, and then the speed of the submarine test piece 1 before entering the water is increased to 4V. When the lower end of the weight 408 collides with the upper end of the height travel control block 409, the submarine test piece 1 approaches the upper surface of the test pool 6. The submarine test piece 1 invades the test pool 6 with a certain kinetic energy and attack angle, completes the cross-medium submarine thin-walled shell impact toughness test process, the acceleration driving cable 401 changes from a straight line to a non-straight line, and the accelerator 4 does not affect the impact toughness test. The accumulator 5 stores energy, which can pull the weight 408 of the submarine test piece 1 and the accelerator 4 from the ground to a high place, and store gravitational potential energy. The gravitational potential energy storage is a manual operation hoist, which makes the moving end 503 of the hoist and the stationary end 504 of the hoist close to each other. The release of the gravitational potential energy of the impact toughness test system is to start the explosion hanger 501.

[0056] The cross-medium submarine thin-walled shell impact toughness test device provided by the present application effectively controls the water entry attack angle by using a guide, effectively controls the kinetic energy of the aircraft entering the water by using an accumulator and an accelerator, effectively controls the cost, and improves the test precision.

[0057] Another embodiment of the present application provides a cross-medium submarine thin-walled shell impact toughness test method, which is realized by the cross-medium submarine thin-walled shell impact toughness test device in the above embodiment. Referring to Figures 1 to 9 The test method comprises the following steps:

[0058] Step S1: install the submarine test piece 1 on the guide 3;

[0059] Step S2: connect the stern of the submarine test piece 1 to the accumulator 5;

[0060] Step S3: connect the bow of the submarine test piece 1 to the accelerator 4;

[0061] Step S4: artificially accumulate energy in the accumulator 5, so that the submarine test piece 1 and the accelerator 4 accumulate gravitational potential energy;

[0062] Step S5: the test control system triggers the explosion hanger ring of the accumulator 5, and the accelerator 4 accelerates the submarine test piece 1 to move downward along the guide 3 at a set attack angle and a set kinetic energy; when the submarine test piece 1 reaches above the test pool 6, the test control system triggers the explosion hanger ring of the guide 3, and the submarine test piece 1 separates from the guide 3 and rushes into the test pool 6;

[0063] Step S6: restore the initial state of the test equipment;

[0064] Step S7: evaluate the impact toughness of the submarine test piece 1.

[0065] The cross-medium submarine thin-walled shell impact toughness test method provided by the present application effectively controls the water entry attack angle by using a guide, effectively controls the water entry kinetic energy of the aircraft by using an accumulator and an accelerator, completes lightweight and impact toughness test evaluation, so as to realize the lightweight of the cross-medium submarine thin-walled shell and improve the performance of the aircraft during the overall quality crossing process.

[0066] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A device for testing the impact toughness of thin-walled hulls of cross- medium submersibles, characterized in that, The application relates to a test device for a submerged vehicle, which comprises a submerged vehicle test piece, a test column, a guide, an accelerator, an accumulator and a test pool, wherein the test column is arranged outside the test pool, the guide is arranged between the test column and the test pool, the submerged vehicle test piece is hung on the guide, the accelerator and the accumulator are arranged on the test column, the tail of the submerged vehicle test piece is connected with the accumulator, the bow is connected with the accelerator, the submerged vehicle test piece is connected with the accumulator and the accelerator through an explosion hanger, the accumulator is used for accumulating the gravitational potential energy of the submerged vehicle test piece and the accelerator, when the accumulator releases the submerged vehicle test piece, the accelerator provides the submerged vehicle test piece with a downward acceleration, and when the submerged vehicle test piece reaches above the test pool, the guide is separated from the submerged vehicle test piece, so that the submerged vehicle test piece rushes into the test pool. The accelerator comprises an accelerator driving cable, a pool fixed pulley, a fixed pulley fixing beam, a pulley block and a weight, wherein the pool fixed pulley is arranged at the bottom of the inner side of the test pool, the fixed pulley fixing beam is arranged at the upper end of the test column, the pulley block is arranged on the weight and the fixed pulley fixing beam, one end of the accelerator driving cable is connected with the bow of the submerged vehicle test piece, and the other end of the accelerator driving cable is fixed on the fixed pulley fixing beam after sequentially passing through the pool fixed pulley and the pulley block. The accelerator further comprises a height stroke control block arranged below the weight at a set distance, and the height stroke control of the weight is realized by controlling the distance between the weight and the height stroke control block. The guide comprises a guide cable assembly and a suspension cable assembly, wherein the guide cable assembly is arranged on the outer side of the submerged vehicle test piece in a circumferential direction, and the two ends of the guide cable assembly are respectively connected with the test column and the bottom of the end of the test pool away from the test column; the guide cable assembly is connected with the explosion hanger on the submerged vehicle test piece through the suspension cable assembly, and the suspension cable assembly can slide relative to the guide cable assembly. The guide cable assembly comprises a first guide cable, a second guide cable and a third guide cable, wherein the first guide cable is arranged above the submerged vehicle test piece, and the second guide cable and the third guide cable are arranged on the left side and the right side of the submerged vehicle test piece respectively. The suspension cable assembly comprises a front suspension cable, a rear suspension cable, a left side guide suspension cable and a right side guide suspension cable, wherein the front suspension cable and the rear suspension cable are respectively connected with the explosion hangers on the top of the bow and the top of the tail of the submerged vehicle test piece, and the ends of the front suspension cable and the rear suspension cable are slidably connected with the first guide cable through a slip ring; the left side guide suspension cable and the right side guide suspension cable are respectively connected with the explosion hangers on the left side and the right side of the tail of the submerged vehicle test piece, and the ends of the left side guide suspension cable and the right side guide suspension cable are slidably connected with the second guide cable and the third guide cable through a slip ring respectively.

2. The thin-walled hull impact toughness test apparatus for a cross-media submersible of claim 1, wherein, The pulley block comprises a first fixed pulley, a first movable pulley, a second fixed pulley and a second movable pulley, wherein the first fixed pulley and the second fixed pulley are arranged on the fixed pulley fixing beam, the first movable pulley and the second movable pulley are arranged on the weight, and the accelerator driving cable sequentially passes through the first fixed pulley, the first movable pulley, the second fixed pulley and the second movable pulley.

3. The thin-walled hull impact toughness test apparatus for a cross-media submersible of claim 1, wherein, The accumulator is a hand chain block, which comprises a starting explosion sling, a front end rope, a moving end of the hand chain block, a stationary end of the hand chain block and a rear end rope, wherein the starting explosion sling is arranged at the rear end of the stern of the underwater vehicle test piece, the moving end of the hand chain block is locked with the starting explosion sling through the front end rope, and the stationary end of the hand chain block is locked with the upper end of the test column through the rear end rope.

4. The thin-walled hull impact toughness test apparatus for a cross-media submersible of claim 1, wherein, The underwater vehicle test piece comprises an underwater vehicle thin-wall shell, a simulation head, a pipe, a front profiling plate, a rear profiling plate, a pressing plate and a plurality of counterweight sleeves, wherein one end of the pipe is connected with the simulation head through the front profiling plate, the other end of the pipe passes through the underwater vehicle thin-wall shell and is connected with the rear profiling plate through the pressing plate, the simulation head and the rear profiling plate abut against the front and rear end faces of the underwater vehicle thin-wall shell respectively, the plurality of counterweight sleeves are arranged in the pipe in sequence in the axial direction, and the thickness and length of the plurality of counterweight sleeves are different.

5. The thin-walled hull impact toughness test apparatus for a cross-media submersible of claim 4, wherein, The front profiling plate is circular and is fixed on the outer circumference of one end of the pipe, the outer circumference of the front profiling plate is in sliding fit with the mounting hole at the front end of the underwater vehicle test piece, and the other end of the pipe is provided with a transition flange, and the pressing plate, the transition flange and the rear profiling plate are fixedly connected through bolts.

6. A test method for a trans-medium submersible thin-walled hull impact toughness test apparatus as claimed in any one of claims 1-5, characterized in that, The method comprises the following steps: Step S1: installing the underwater vehicle test piece on the guider; Step S2: connecting the stern of the underwater vehicle test piece with the accumulator; Step S3: connecting the bow of the underwater vehicle test piece with the accelerator; Step S4: artificially accumulating energy of the accumulator, so as to accumulate gravitational potential energy of the underwater vehicle test piece and the accelerator; Step S5: triggering the explosion sling of the accumulator by the test control system, and accelerating the underwater vehicle test piece to move downward along the guider at a set attack angle and a set kinetic energy; when the underwater vehicle test piece reaches above the test pool, triggering the explosion sling of the guider by the test control system, and making the underwater vehicle test piece separate from the guider and rush into the test pool; Step S6: restoring the initial state of the test equipment; Step S7: evaluating the impact toughness of the underwater vehicle test piece.

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