Device and method for testing impact toughness of thin-wall shell of cross-medium underwater vehicle

Abstract

The invention belongs to the technical field of thin-wall shell impact toughness tests, and particularly relates to a cross-medium underwater vehicle thin-wall shell impact toughness test device and method. The device comprises an underwater vehicle test piece, a test stand column, a guider, an accelerator, an energy accumulator and a test pool, the guider is arranged between the test stand column and the test pool, the underwater vehicle test piece is suspended on the guider, the accelerator and the energy accumulator are both arranged on the test stand column, the stern of the underwater vehicle test piece is connected with the energy accumulator, and the accelerator is connected with the energy accumulator. The bow part is connected with the accelerator, the underwater vehicle test piece is connected with the energy accumulator and the accelerator through the explosion hanging ring, and the energy accumulator is used for accumulating gravitational potential energy for the underwater vehicle test piece and the accelerator; and the accelerator provides an underrush-into-water acceleration for the underwater vehicle test piece. Aiming at the water-entry impact load of the cross-medium aircraft, the water-entry attack angle is effectively controlled by adopting the guider, the water-entry kinetic energy of the aircraft is effectively controlled by adopting the energy accumulator and the accelerator, and the cost is effectively controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of thin-wall shell impact toughness testing, and in particular relates to a device and method for testing the impact toughness of a thin-wall shell of a cross-medium submersible. Background Art

[0002] With the development of aviation industry technology in various countries, the requirements of major aviation powers in the world for existing aircraft are getting higher and higher. Traditional single-medium aircraft can no longer meet actual needs. Therefore, research on cross-medium aircraft that can adapt to multiple medium environments has become one of the important development directions of each aviation industry power. Cross-medium aircraft can cross between different media multiple times, combining the advantages of aerial vehicles and underwater vehicles, generating fluid loads during medium crossing, and making the structure experience a harsh mechanical environment. At present, the research on impact toughness loads of cross-medium aircraft is still an emerging field, and there are few studies.

[0003] At present, the number of states calculated in fluid mechanics is limited, and the modeling process takes a long time. The calculation process is time-consuming and costly, and often requires supercomputers to be implemented, which is not conducive to engineering applications and rapid prediction of loads in other states. In addition, the cost of physical testing is too high, especially the expensive power system. The lightweighting of the thin-walled shell of a cross-medium submersible is a key factor in improving the performance of the aircraft during the overall mass crossing process. However, if the impact toughness of the thin-walled shell of a cross-medium submersible is insufficient, it is also an evaluation factor that restricts the design of the cross-medium submersible. How to test and judge lightweight and impact toughness is the core indicator of the success or failure of the project. Therefore, in the process of crossing the medium, improving the impact toughness of the aircraft when entering the water is a technical problem that needs to be solved. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a device and method for testing the impact toughness of the thin-walled shell of a cross-medium submersible, so as to achieve the purpose of improving the water entry impact toughness of the aircraft during the process of crossing the medium.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, the present invention provides a cross-medium submersible thin-wall shell impact toughness test device, comprising a submersible test piece, a test column, a guide, an accelerator, an accumulator and a test pool, wherein the test column is arranged on the outside of the test pool, the guide is arranged between the test column and the test pool, the submersible test piece is suspended on the guide, the accelerator and the accumulator are both arranged on the test column, the stern of the submersible test piece is connected to the accumulator, the bow is connected to the accelerator, the submersible test piece is connected to the accumulator and the accelerator through an explosive lifting ring, the accumulator is used for accumulating gravitational potential energy of the submersible test piece and the accelerator; when the accumulator releases the submersible test piece, the accelerator provides downward acceleration for the submersible test piece; when the submersible test piece reaches above the test pool, the guide is separated from the submersible test piece, so that the submersible test piece rushes into the test pool.

[0007] In one possible implementation, the accelerator includes an acceleration drive cable, a fixed pulley in a water pool, a fixed pulley fixed beam, a pulley block and a weight, wherein the fixed pulley in the water pool is arranged at the inner bottom of the test water pool, the fixed pulley fixed beam is arranged at the upper end of the test column, the pulley block is arranged on the fixed pulley fixed beam and the weight, one end of the acceleration drive cable is connected to the bow of the submersible test piece, and the other end is fixed on the fixed pulley fixed beam after passing through the fixed pulley in the water pool and the pulley block in sequence.

[0008] In one possible implementation, the pulley group includes 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 both arranged on the fixed pulley fixing beam, the first movable pulley and the second movable pulley are both arranged on the weight, and the acceleration drive rope passes through the first fixed pulley, the first movable pulley, the second fixed pulley and the second movable pulley in sequence.

[0009] In one possible implementation, the accelerator further includes a height travel control block disposed at a set distance below the weight, and the height travel control of the weight is achieved by controlling the distance between the weight and the height travel control block.

[0010] In one possible implementation, the guide includes a guide rope assembly and a suspension rope assembly, wherein the guide rope assembly is circumferentially arranged on the outside of the submersible test piece, and its two ends are respectively connected to the test column and the bottom of one end of the test pool away from the test column; the guide rope assembly is connected to the explosive lifting ring on the submersible 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 includes a first guide rope, a second guide rope and a third guide rope, wherein the first guide rope is located above the submersible test piece, and the second guide rope and the third guide rope are respectively arranged on the left side and the right side of the submersible test piece;

[0012] In one possible implementation, the suspension cable assembly includes 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 respectively connected to the explosive suspension rings at the top of the bow and the top of the stern of the submersible test piece, and the ends of the front suspension cable and the rear suspension cable are slidingly connected to the first guide cable through slip rings; the left guide suspension cable and the right guide suspension cable are respectively connected to the explosive suspension rings on the left and right sides of the stern of the submersible test piece, and the ends of the left guide suspension cable and the right guide suspension cable are slidingly connected to the second guide cable and the third guide cable through slip rings.

[0013] In one possible implementation, the accumulator is a hand chain hoist, which includes a starting explosive ring, a front end rope, a moving end of the hand chain hoist, a stationary end of the hand chain hoist and a rear end rope, wherein the starting explosive ring is arranged at the rear end of the stern of the submersible test piece, the moving end of the hand chain hoist is locked with the starting explosive ring through the front end rope; the stationary end of the hand chain hoist is locked with the upper end of the test column through the rear end rope.

[0014] In one possible implementation, the submersible test piece includes a thin-walled outer shell of the submersible, a simulation head, a tube, a front profiling plate, a rear profiling plate, a pressure plate and a plurality of counterweight sleeves, wherein one end of the tube is connected to the simulation head through the front profiling plate, and the other end of the tube passes through the thin-walled outer shell of the submersible and is connected to the rear profiling plate through the pressure plate, the simulation head and the rear profiling plate are respectively abutted against the front and rear end surfaces of the thin-walled outer shell of the submersible, and a plurality of counterweight sleeves are sequentially arranged in the tube along the axial direction, and the thickness and length of the plurality of counterweight sleeves are different.

[0015] In one possible implementation, the front profiling plate is in the shape of a circular ring and is fixed on the outer circumference of one end of the tube, and the outer circumference of the front profiling plate is slidably matched with the mounting hole at the front end of the submersible test piece; a transition flange is provided at the other end of the tube, and the pressure plate, the transition flange and the rear profiling plate are fixedly connected by bolts.

[0016] Another aspect of the present invention provides a test method for the above-mentioned cross-medium submersible thin-wall shell impact toughness test device, comprising the following steps:

[0017] Step S1: installing the submersible test piece onto the guide;

[0018] Step S2: the stern of the submersible test piece is connected to the accumulator;

[0019] Step S3: the bow of the submersible test piece is connected to the accelerator;

[0020] Step S4: the accumulator artificially stores energy, allowing the submersible test piece and the accelerator to accumulate gravitational potential energy;

[0021] Step S5: the test control system triggers the explosive ring of the accumulator, and the accelerator causes the submersible test piece to accelerate downward along the guide at a set angle of attack and set kinetic energy; when the submersible test piece reaches the top of the test pool, the test control system triggers the explosive ring of the guide, and the submersible test piece breaks away from the guide and rushes into the test pool;

[0022] Step S6: restore the test equipment to its initial state;

[0023] Step S7: Evaluate the impact toughness of the submersible test piece.

[0024] The advantages and beneficial effects of the present invention are as follows: the present invention provides a cross-media submersible thin-wall shell impact toughness test device, and for the cross-media aircraft entering water impact load, a guide is used to effectively control the water entry angle, and an accumulator and an accelerator are used to effectively control the aircraft's kinetic energy entering water, thereby effectively controlling costs.

[0025] The present invention provides a method for testing the impact toughness of the thin-walled shell of a cross-media submersible. Aiming at the impact load of the cross-media aircraft entering water, a guide is used to effectively control the water entry angle, and an accumulator and an accelerator are used to effectively control the kinetic energy of the aircraft entering water, so as to complete lightweighting and impact toughness test evaluation, so as to achieve lightweighting of the thin-walled shell of the cross-media submersible and improve the performance of the aircraft during the overall mass crossing process.

[0026] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0027] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 1 This is an axonometric diagram of a device for testing the impact toughness of a thin-walled shell of a cross-medium submersible according to the present invention;

[0030] Figure 2 for Figure 1 A partial view of the A;

[0031] Figure 3 for Figure 2 Partial view at point B;

[0032] Figure 4It is a side view of a device for testing the impact toughness of a thin-walled shell of a cross-medium submersible according to the present invention;

[0033] Figure 5 for Figure 4 Partial view at point C;

[0034] Figure 6 It is a schematic diagram of the connection between the submersible test piece and the guide in an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of a submersible test piece in an embodiment of the present invention;

[0036] Figure 8 for Figure 7 Partial view at D;

[0037] Fig. 9 for Figure 7 Partial view at E.

[0038] In the figure: 1-submersible test piece, 101-submersible thin-walled shell, 102-simulation head, 103-tube, 104-front profiling plate, 105-rear profiling plate, 106-transition flange, 107-pressure plate, 108-weight sleeve, 109-weld, 110-convex profiling surface, 111-profiling step surface, 2-test column, 3-guide, 301-first guide rope, 302-second guide rope, 303-third guide rope, 304-first water tank anchor position, 305-second water tank anchor position, 306-third water tank anchor position, 310-front suspension cable, 311- 1-rear suspension cable, 312-left guide suspension cable, 313-right guide suspension cable, 4-accelerator, 401-acceleration drive cable, 402-water pool fixed pulley, 403-fixed pulley fixing 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-accumulator, 501-starting explosive lifting ring, 502-front end cable, 503-hand chain hoist moving end, 504-hand chain hoist stationary end, 504-rear end cable, 6-test water pool, 7-experimental base. DETAILED DESCRIPTION

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] An embodiment of the present invention provides a thin-wall shell impact toughness test device for a cross-medium submersible, which aims at the impact load of a cross-medium aircraft entering water, and achieves the purpose of improving the impact toughness of the aircraft during the process of crossing the medium. Figures 1 to 9 As shown, the cross-medium submersible thin-wall shell impact toughness test device comprises a submersible test piece 1, a test column 2, a guide 3, an accelerator 4, an accumulator 5 and a test pool 6, wherein the test column 2 is arranged on the outside of the test pool 6, the guide 3 is arranged between the test column 2 and the test pool 6, the submersible test piece 1 is suspended on the guide 3, the guide 3 provides guidance for the downward movement of the submersible test piece 1, the accelerator 4 and the accumulator 5 are both arranged on the test column 2, the stern of the submersible test piece 1 is connected to the accumulator 5, and the bow is connected to the accelerator 4. Then, the submersible test piece 1 is connected to the accumulator 5 and the accelerator 4 through the explosive lifting ring. The accumulator 5 is used to store gravitational potential energy for the submersible test piece 1 and the accelerator 4. When the accumulator 5 releases the submersible test piece 1, the accelerator 4 provides downward acceleration for the submersible test piece 1, and the guide 3 provides spatial motion guidance for the submersible test piece 1 to control the posture of the submersible test piece 1 moving from the air to the water across the medium. When the submersible test piece 1 reaches above the test water pool 6, the guide 3 is separated from the submersible test piece 1, so that the submersible test piece 1 rushes into the test water pool 6.

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

[0043] See also Figure 3 As shown, in the embodiment of the present invention, the accumulator 5 is a hand chain hoist, which includes a starting explosion ring 501, a front end cable 502, a hand chain hoist moving end 503, a hand chain hoist stationary end 504 and a rear end cable 504, wherein the starting explosion ring 501 is fixed to the rear end of the stern of the submersible test piece 1, and the hand chain hoist moving end 503 is locked with the starting explosion ring 501 through the front end cable 502. The hand chain hoist stationary end 504 is locked with the upper end of the test column 2 through the rear end cable 504.

[0044] See also Figure 2 and Figure 5As shown, in the embodiment of the present invention, the accelerator 4 includes an acceleration drive cable 401, a fixed pulley 402 in a water pool, a fixed pulley fixed beam 403, a pulley block and a weight 408, wherein the fixed pulley 402 in the water pool is arranged at the inner bottom of one end of the test water pool 6 away from the test column 2, the fixed pulley fixed beam 403 is arranged at the upper end of the test column 2, the pulley block is arranged on the fixed pulley fixed beam 403 and the weight 408, one end of the acceleration drive cable 401 is connected to the bow of the submersible test piece 1, and the other end is fixed on the fixed pulley fixed beam 403 after passing through the fixed pulley 402 in the water pool and the pulley block in sequence.

[0045] Furthermore, by adjusting the installation position of the fixed pulley 402 of the water pool and the bottom of the test water pool 6, the inclination angle between the acceleration drive cable 401 and the ground plane is changed.

[0046] Specifically, the pulley block includes 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 both arranged on the fixed pulley fixing beam 403, the first movable pulley 405 and the second movable pulley 407 are both arranged on the weight 408, and the acceleration drive cable 401 sequentially passes through the first fixed pulley 404, the first movable pulley 405, the second fixed pulley 406 and the second movable pulley 407. Specifically, the number of movable pulleys and static pulleys in the pulley block can be adjusted according to the test requirements.

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

[0048] In an embodiment of the present invention, the guide 3 includes a guide rope assembly and a suspension rope assembly, wherein the guide rope assembly is circumferentially arranged on the outside of the submersible test piece 1, and its two ends are respectively connected to the bottom of the test column 2 and the test pool 6 at one end away from the test column 2; the guide rope assembly is connected to the explosive lifting ring on the submersible test piece 1 through the suspension rope assembly, and the suspension rope assembly can slide relative to the guide rope assembly.

[0049] See also Figure 2 and Figure 6As shown, in the embodiment of the present invention, the guide rope assembly includes a first guide rope 301, a second guide rope 302 and a third guide rope 303, wherein the first guide rope 301 is located above the submersible test piece 1, and the second guide rope 302 and the third guide rope 303 are respectively arranged on the left and right sides of the submersible test piece 1; the first guide rope 301, the second guide rope 302 and the third guide rope 303 are arranged in parallel and present an angle of attack with the horizontal plane, and the upper end of each guide rope is respectively fixed at a different position of the test column 2, and the lower end of each guide rope is respectively anchored on the first water pool anchor position 304, the second water pool anchor position 305 and the third water pool anchor position 306 provided at the bottom of the test water pool 6. Specifically, a plurality of guide ropes are provided on the first water pool anchor position 304, the second water pool anchor position 305 and the third water pool anchor position 306, so as to adjust the inclination angle of each guide rope and realize the adjustment of the angle of attack of the submersible test piece 1.

[0050] In an embodiment of the present invention, the suspension cable assembly includes a front suspension cable 310, a rear suspension cable 311, a left guide suspension cable 312 and a right guide suspension cable 313, wherein the front suspension cable 310 and the rear suspension cable 311 are respectively connected to the explosive suspension rings at the top of the bow and the top of the stern of the submersible test piece 1, and the ends of the front suspension cable 310 and the rear suspension cable 311 are slidingly connected to the first guide cable 301 through slip rings; the left guide suspension cable 312 and the right guide suspension cable 313 are respectively connected to the explosive suspension rings on the left and right sides of the stern of the submersible test piece 1, and the ends of the left guide suspension cable 312 and the right guide suspension cable 313 are slidingly connected to the second guide cable 302 and the third guide cable 303 through slip rings.

[0051] Preferably, all guide ropes and suspension ropes are made of steel wire ropes and are used in a nearly straightened state. When the head of the submersible test piece 1 approaches the upper surface of the test pool 6, the four explosive rings connecting the submersible test piece 1 and the guide 3 are detonated, and then the guide 3 completes its guiding function without affecting the impact toughness test.

[0052] See also Figures 7 to 9 As shown, in the embodiment of the present invention, the submersible test piece 1 includes a submersible thin-walled shell 101, a simulation head 102, a tube 103, a front profiling plate 104, a rear profiling plate 105, a pressure plate 107 and a plurality of weight sleeves 108, wherein one end of the tube 103 is connected to the simulation head 102 through the front profiling plate 104, and the other end of the tube 103 passes through the submersible thin-walled shell 101 and is connected to the rear profiling plate 105 through the pressure plate 107, the simulation head 102 and the rear profiling plate 105 are respectively abutted against the front and rear end surfaces of the submersible thin-walled shell 101, and a plurality of weight sleeves 108 are sequentially arranged in the tube 103 along the axial direction, and the thickness and length of the plurality of weight sleeves 108 are different.

[0053] Specifically, the front profiling plate 104 is annular and welded on the outer circumference of one end of the tube 103. The front profiling plate 104 is fixedly connected to the simulation head 102 by screws, and the outer circumference of the front profiling plate 104 is slidably matched with the mounting hole at the front end of the submersible test piece 1. The other end of the tube 103 passes through the rear profiling plate 105, and the end is welded to the transition flange 106 by a weld 109, so the tube 103, the front profiling plate 104 and the transition flange 106 are disposable parts for testing. The pressing plate 107, the transition flange 106 and the rear profiling plate 105 are fixedly connected by bolts. The profiling plate 105 is a step profiling structure, having a convex profiling curved surface 110 and a profiling step surface 111. The convex profiling curved surface 110 is in profiling conflict with the rear hole of the submersible thin-walled shell 101, and forms a front and rear linear moving pair, and the profiling step surface 111 is in conflict with the rear end face plane of the submersible thin-walled shell 101. Specifically, the thin-walled shell 101 of the submersible is made of aviation-grade large-size aluminum.

[0054] Specifically, multiple weight sleeves 108 are inserted into the tube 103, and each weight sleeve 108 has the same outer diameter, but different inner diameters and lengths. The purpose of the weight sleeves 108 is to make the center of gravity and mass of the submersible test piece 1 consistent with that before the submersible enters the water. The front end of the multiple weight sleeves 108 collides with the simulation head 102, and the front and rear collides with each other in sequence. The outer wall of the weight sleeve 108 collides with the inner wall of the tube 103. The pressure plate 107 collides with the rear end of the rearmost weight sleeve 108.

[0055] In the embodiment of the present invention, the pulley block can effectively increase the falling speed of the weight 408, giving the submersible 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 submersible test piece 1. The speed of the weight 408 is accelerated from zero to the falling speed V, and the speed of the submersible 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 submersible test piece 1 approaches the top of the test pool 6. The submersible test piece 1 invades the test pool 6 with a certain kinetic energy and angle of attack, completing the impact toughness test process of the cross-medium submersible thin-walled shell, and the acceleration drive cable 401 changes from a straight state to a non-straight state, and the accelerator 4 does not affect the impact toughness test. The accumulator 5 functions to store energy, and can pull the submersible test piece 1 and the weight 408 of the accelerator 4 from the ground to a high place to store gravitational potential energy. The gravity potential energy is stored by manually operating the hand chain hoist, so that the moving end 503 of the hand chain hoist is close to the stationary end 504 of the hand chain hoist. The gravity potential energy release of the impact toughness test system is to start the explosion ring 501 to detonate.

[0056] The present invention provides a cross-media submersible thin-wall shell impact toughness testing device. Aiming at the impact load of the cross-media aircraft entering water, the device adopts a guide to effectively control the water entry angle, and adopts an accumulator and an accelerator to effectively control the kinetic energy of the aircraft entering water, thereby effectively controlling the cost and improving the test accuracy.

[0057] Another embodiment of the present invention provides a method for testing the impact toughness of a thin-walled shell of a cross-media submersible, which is implemented by the cross-media submersible thin-walled shell impact toughness testing device in the above embodiment. Figures 1 to 9 As shown, the test method includes the following steps:

[0058] Step S1: installing the submersible test piece 1 onto the guide 3;

[0059] Step S2: the stern of the submersible test piece 1 is connected to the accumulator 5;

[0060] Step S3: the bow of the submersible test piece 1 is connected to the accelerator 4;

[0061] Step S4: the accumulator 5 stores energy artificially, allowing the submersible test piece 1 and the accelerator 4 to accumulate gravitational potential energy;

[0062] Step S5: the test control system triggers the explosive ring of the accumulator 5, and the accelerator 4 accelerates the submersible test piece 1 downward along the guide 3 at a set angle of attack and set kinetic energy; when the submersible test piece 1 reaches the top of the test pool 6, the test control system triggers the explosive ring of the guide 3, and the submersible test piece 1 breaks away from the guide 3 and rushes into the test pool 6;

[0063] Step S6: Restore the test equipment to its initial state;

[0064] Step S7: Evaluate the impact toughness of the submersible test piece 1.

[0065] The present invention provides a method for testing the impact toughness of the thin-walled shell of a cross-media submersible. Aiming at the impact load of the cross-media aircraft entering water, a guide is used to effectively control the water entry angle, and an accumulator and an accelerator are used to effectively control the kinetic energy of the aircraft entering water, so as to complete lightweighting and impact toughness test evaluation, so as to achieve lightweighting of the thin-walled shell of the cross-media submersible and improve the performance of the aircraft during the overall mass crossing process.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A device for testing the impact toughness of a thin-walled shell of a cross-medium submersible, characterized in that: The invention comprises a submersible test piece (1), a test column (2), a guide (3), an accelerator (4), an accumulator (5) and a test pool (6), wherein the test column (2) is arranged outside the test pool (6), the guide (3) is arranged between the test column (2) and the test pool (6), the submersible test piece (1) is suspended on the guide (3), the accelerator (4) and the accumulator (5) are both arranged on the test column (2), the stern of the submersible test piece (1) is connected to the accumulator (5), and the bow is connected to the accelerator (4). 4), the submersible test piece (1) is connected to the accumulator (5) and the accelerator (4) through an explosive lifting ring, the accumulator (5) is used to store gravitational potential energy for the submersible test piece (1) and the accelerator (4); when the accumulator (5) releases the submersible test piece (1), the accelerator (4) provides downward acceleration for the submersible test piece (1); when the submersible test piece (1) reaches above the test pool (6), the guide (3) separates from the submersible test piece (1), allowing the submersible test piece (1) to rush into the test pool (6).

2. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 1 is characterized in that: The accelerator (4) comprises an acceleration driving cable (401), a fixed pulley (402) in a water pool, a fixed pulley fixing beam (403), a pulley block and a weight (408), wherein the fixed pulley (402) in the water pool is arranged at the inner bottom of the test water pool (6), 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 cable (401) is connected to the bow of the submersible test piece (1), and the other end is fixed to the fixed pulley fixing beam (403) after passing through the fixed pulley (402) in the water pool and the pulley block in sequence.

3. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 2 is characterized in that: 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 both arranged on the fixed pulley fixing beam (403), the first movable pulley (405) and the second movable pulley (407) are both arranged on the weight (408), and the acceleration drive 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.

4. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 2, characterized in that: The accelerator (4) also includes a height travel control block (409) arranged at a set distance below the weight (408), and the height travel control of the weight (408) is achieved by controlling the distance between the weight (408) and the height travel control block (409).

5. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 1, characterized in that: The guide (3) comprises a guide rope assembly and a suspension rope assembly, wherein the guide rope assembly is arranged circumferentially on the outside of the submersible test piece (1), and its two ends are respectively connected to the bottom of the test column (2) and the test pool (6) at one end away from the test column (2); the guide rope assembly is connected to the explosive lifting ring on the submersible test piece (1) through the suspension rope assembly, and the suspension rope assembly can slide relative to the guide rope assembly.

6. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 5, characterized in that: The guide rope assembly comprises a first guide rope (301), a second guide rope (302) and a third guide rope (303), wherein the first guide rope (301) is located above the submersible test piece (1), and the second guide rope (302) and the third guide rope (303) are respectively arranged on the left side and the right side of the submersible test piece (1); The suspension cable assembly comprises a front suspension cable (310), a rear suspension cable (311), a left guide suspension cable (312) and a right guide suspension cable (313), wherein the front suspension cable (310) and the rear suspension cable (311) are respectively connected to the explosive suspension rings at the top of the bow and the top of the stern of the submersible test piece (1), and the ends of the front suspension cable (310) and the rear suspension cable (311) are both slidably connected to the first guide cable (301) through a slip ring; the left guide suspension cable (312) and the right guide suspension cable (313) are respectively connected to the explosive suspension rings on the left and right sides of the stern of the submersible test piece (1), and the ends of the left guide suspension cable (312) and the right guide suspension cable (313) are respectively slidably connected to the second guide cable (302) and the third guide cable (303) through a slip ring.

7. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 1, characterized in that: The accumulator (5) is a hand chain hoist, which comprises a starting explosion ring (501), a front end rope (502), a moving end (503) of the hand chain hoist, a stationary end (504) of the hand chain hoist and a rear end rope (504), wherein the starting explosion ring (501) is arranged at the rear end of the stern of the submersible test piece (1), the moving end (503) of the hand chain hoist is locked with the starting explosion ring (501) through the front end rope (502), and the stationary end (504) of the hand chain hoist is locked with the upper end of the test column (2) through the rear end rope (504).

8. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 1, characterized in that: The submersible test piece (1) comprises a submersible thin-walled shell (101), a simulation head (102), a tube (103), a front profiling plate (104), a rear profiling plate (105), a pressure plate (107) and a plurality of weight sleeves (108), wherein one end of the tube (103) is connected to the simulation head (102) via the front profiling plate (104), the other end of the tube (103) passes through the submersible thin-walled shell (101) and is connected to the rear profiling plate (105) via the pressure plate (107), the simulation head (102) and the rear profiling plate (105) are respectively in contact with the front and rear end surfaces of the submersible thin-walled shell (101), and the plurality of weight sleeves (108) are sequentially arranged in the tube (103) along the axial direction, and the thickness and length of the plurality of weight sleeves (108) are different.

9. The impact toughness test device for thin-wall shell of cross-medium submersible according to claim 8, characterized in that: The front profiling plate (104) is annular and fixed on the outer circumference of one end of the tube (103). The outer circumference of the front profiling plate (104) is slidably matched with the mounting hole at the front end of the submersible test piece (1). The other end of the tube (103) is provided with a transition flange (106). The pressure plate (107), the transition flange (106) and the rear profiling plate (105) are fixedly connected by bolts.

10. A test method for the impact toughness test device of a cross-medium submersible thin-wall shell according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: installing the submersible test piece (1) onto the guide (3); Step S2: the stern of the submersible test piece (1) is connected to the accumulator (5); Step S3: the bow of the submersible test piece (1) is connected to the accelerator (4); Step S4: the accumulator (5) artificially stores energy, allowing the submersible test piece (1) and the accelerator (4) to accumulate gravitational potential energy; Step S5: the test control system triggers the explosive ring of the accumulator (5), and the accelerator (4) causes the submersible test piece (1) to accelerate downward along the guide (3) at a set angle of attack and set kinetic energy; when the submersible test piece (1) reaches the top of the test pool (6), the test control system triggers the explosive ring of the guide (3), and the submersible test piece (1) breaks away from the guide (3) and rushes into the test pool (6); Step S6: restore the test equipment to its initial state; Step S7: Evaluate the impact toughness of the submersible test piece (1).

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