Structural displacement testing device and method under underwater explosion effect

Abstract

The invention relates to a structure displacement testing device and method under the action of underwater explosion. Comprising a shell box, a water moving assembly, a lining plate, a traction assembly, a detected plate, a supporting assembly and a detection assembly comprising a stay wire displacement sensor. The lining plate is movably arranged relative to the wall of the shell box through the traction assembly, and the lining plate divides the space in the shell box into a water storage chamber and a test chamber; the supporting assembly is arranged in the test room, a tested plate is arranged on the supporting assembly, and the tested plate is located below the explosion source; the water moving assembly moves water in the water storage chamber into the test chamber during a test, and conveys the water in the test chamber to the water storage chamber after a test stage is completed; the stay wire displacement sensor is arranged outside water and is connected with the tested plate through a stay wire extension line. The device is simple in structure, and achieves the real-time testing of the displacement of the underwater explosion action structure.

Description

Technical Field

[0001] The invention belongs to the field of underwater explosion, and in particular relates to a device and method for testing structural displacement under underwater explosion. Background Art

[0002] At present, with the continuous deepening of construction in the fields of transportation, bridges, water conservancy and hydropower, military protection, etc., it also involves the problem of measuring the dynamic response of structures in underwater environments. In order to improve the reliability of the structure, a large amount of structural dynamic response data must be measured through experiments, thereby providing accurate and reliable data support for the design of the structure.

[0003] The progress in underwater explosion test research has put forward higher requirements for underwater data measurement technology. Traditional technology cannot measure the real-time displacement of the structure during underwater explosion tests, and the structural displacement is an important data for analyzing its dynamic response. At the same time, the water impact during the explosion test causes large fluctuations, making it difficult to quickly stabilize and observe the state of the object being measured. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for testing the displacement of a structure under the action of an underwater explosion.

[0005] The technical solution to achieve the purpose of the present invention is: a structural displacement test device under the action of underwater explosion, including a shell box, a water transfer component, a liner, a traction component, a test plate, a support component and a detection component including a wire displacement sensor;

[0006] The lining plate is movably arranged relative to the shell box wall through a traction assembly, and the lining plate divides the space inside the shell box into a water storage chamber and a test chamber; the support assembly is arranged in the test chamber, on which a test plate is arranged, and the test plate is located below the explosion source; the water transfer assembly moves the water in the water storage chamber into the test chamber during the test, and transports the water in the test chamber to the water storage chamber after the test is completed in stages; the wire displacement sensor is arranged outside the water and connected to the test plate through a wire extension line; when the explosion source explodes, the test plate is deformed by the excitation of the explosion load, causing the wire extension line to stretch or contract accordingly and transmit it to the wire displacement sensor, and the wire displacement sensor converts the stretching or contraction amount into an electrical signal and records it.

[0007] Furthermore, a bag is provided in the water storage chamber.

[0008] Further, the water transfer assembly includes a pump source mounted on the housing box, one end of the pump source extends to the test chamber, and the other end of the pump source extends to the water storage chamber, for transferring water from the test chamber to the water storage chamber;

[0009] The water transfer assembly also includes two sets of telescopic sources installed on the shell box. The movable rod of the telescopic source is connected to a push plate, and a flexible cover is provided on the push plate. The movable rod of the telescopic source is extended to make the push plate push the liner to compress the bladder to discharge the water into the test chamber, and make the flexible cover unfold and cover the water surface of the test chamber to form a shield.

[0010] Furthermore, the traction assembly includes at least one group of guide rods, and each group of guide rods is provided with a plurality of limiting parts, and the lining plate is limited by the limiting parts.

[0011] Furthermore, the limiting part includes a groove, a block and a spring arranged on the guide rod;

[0012] The clamping block is wedge-shaped, the top end of the wedge is hinged to the guide rod, and a spring is arranged between the bottom end of the clamping block and the guide rod.

[0013] Furthermore, the support assembly includes a cushion seat fixedly connected in the test chamber, a bracket is detachably arranged above the cushion seat, and the tested plate is arranged on the bracket.

[0014] Furthermore, it also includes a guide component, a beam body is provided on the top of the shell box, a wire displacement sensor is arranged on the beam body, a wire extension line is connected to the measured plate through a hook, the wire extension line is guided and tensioned in water by the guide component, and the wire extension line passes through the gap between the two sets of telescopic sources.

[0015] Furthermore, the guide assembly includes a tube body and a pulley arranged in the test chamber, and the extension line of the pull wire passes through the tube body and passes around the pulley to be connected with the hook.

[0016] A method for displacement measurement using the above-mentioned testing device comprises the following steps:

[0017] Step (1): The object to be tested is fixedly placed in a bracket and is directed toward the explosion source;

[0018] Step (2): the object to be measured is connected to the extension line of the pull wire, water covering the object to be measured and the explosion source is injected into the container, and the extension line of the pull wire passes through the water surface to connect to the pull wire displacement sensor;

[0019] Step (3): Control the explosion source to explode, and the wire displacement sensor records the deformation of the object to be measured through the wire extension line.

[0020] Furthermore, in step (2), "injecting water into the container to cover the object to be tested and the explosion source" is specifically as follows: controlling the movable rod of the telescopic source to extend to drive the push plate to push the lining plate, and the lining plate compresses the bag to discharge the water into the test chamber to form water covering the object to be tested and the explosion source; at the same time, the movable rod of the telescopic source extends to drive the flexible covering sheet to unfold, thereby forming a barrier to the water splashed upward during the explosion.

[0021] Compared with the prior art, the present invention has the following significant advantages:

[0022] Before the test, water is transported to the water storage chamber through the water transfer assembly, which makes it easier for personnel to enter the test chamber for operation and configuration. When conducting underwater explosion tests, the water is discharged into the test chamber. This method effectively saves water resources. The bag collects water in the water storage chamber and separates it from the water in the test chamber, without the need for additional waterproofing steps.

[0023] When the explosion source explodes, the tested plate is deformed by the stimulation of the explosion load, causing the tensioned guy wire extension line to stretch or contract accordingly. The guy wire displacement sensor ensures that the tension of the guy wire extension line remains unchanged and outputs an electrical signal proportional to the movement distance of the guy wire extension line, thereby realizing real-time testing of the displacement of the underwater explosion structure.

[0024] The telescopic source movable rod extends to drive the push plate to push the liner, and the liner compresses the bag to discharge water into the test chamber to form the conditions for underwater explosion. At the same time, the flexible cover sheet is unfolded to form a barrier for the water splashing upward during the explosion.

[0025] When the explosion source explodes, water generates waves that impact the liner. After being impacted by the water waves, the liner will move along the guide rod, causing the liner to compress the bag to absorb the impact force generated by the water waves, thereby expanding the volume of the test chamber and increasing the range of the water waves. The water in the bag enters the test chamber to increase the total capacity of water in the test chamber, allowing the water waves after the explosion to quickly calm down. This can not only reduce overflow caused by water waves, but also timely observe the state of displacement caused by deformation of the tested plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the displacement testing device of the present invention.

[0027] Figure 2 This is a schematic diagram of the connection between the liner and the shell box through the traction assembly of the present invention.

[0028] Figure 3 It is a partially enlarged schematic diagram of the limiting portion of the present invention.

[0029] Figure 4 It is a schematic diagram of the connection relationship between the tested board and the detection component of the present invention.

[0030] Figure 5 It is a schematic diagram of the telescopic source of the present invention.

[0031] Description of reference numerals:

[0032] 10-shell box, 11-beam body, 20-water transfer assembly, 21-pump source, 22-telescopic source, 23-push plate, 24-flexible cover sheet, 30-lining plate, 31-bladder bag, 40-traction assembly, 41-guide rod, 42-limiting part, 421-block, 422-spring, 50-tested plate, 60-support assembly, 61-pad, 62-bracket, 70-detection assembly, 71-pull wire displacement sensor, 72-hook, 73-pull wire extension line, 80-guide assembly, 81-tube body, 82-pulley. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] A testing device for testing a structural displacement under underwater explosion comprises a shell box 10, a lining plate 30, a tested plate 50 and a detection assembly 70.

[0036] See also Figure 1 , Figure 2 The shell box 10 is provided with an observation window, through which the specific conditions of the explosion test can be observed. The shell box 10 is provided with a water transfer assembly 20, and the lining plate 30 is connected to the shell box 10 through a traction assembly 40. The lining plate 30 divides the inner cavity of the shell box 10 into a water storage chamber and a test chamber.

[0037] The water transfer component 20 is used to transport and move water between the water storage chamber and the test chamber. For example, before the test, when the test chamber needs to be configured, the water is transported to the water storage chamber through the water transfer component 20. This makes it convenient for personnel to go down to the test chamber to operate and configure. When conducting an underwater explosion test, the water is discharged into the test chamber. In this way, water resources are effectively saved.

[0038] See also Figure 2 A bag 31 for containing water is provided in the water storage chamber. The bag 31 is preferably made of elastic materials such as rubber. Water is contained in the water storage chamber. On the one hand, it is separated from the water in the test chamber and no additional waterproofing process is required. On the other hand, after the bag 31 contains water, it will be in full contact with the lining 30. When the lining 30 moves, it can squeeze the bag 31, and the water can be squeezed out from the top of the bag 31 and discharged into the test chamber.

[0039] See also Figure 1 , Figure 4The board under test 50 is arranged in the shell box 10 through a supporting assembly 60 . The supporting assembly 60 includes a cushion seat 61 fixed in the test chamber. A bracket 62 is detachably arranged above the cushion seat 61 through a plurality of connecting members. The board under test 50 is connected to the bracket 62 .

[0040] See also Figure 4 The connecting parts are preferably bolts, screws, etc. Before the underwater explosion test, the bracket 62 equipped with the test plate 50 is connected to the cushion seat 61. After the underwater explosion test, the bracket 62 can be removed to facilitate the next test. The cushion seat 61 is set to play a role of lifting support, providing a platform for the staff to step on when entering the test room. At the same time, when the water in the test room is transported to the water storage room, the water level in the test room can be lower than the cushion seat 61, which effectively shortens the water delivery time and improves the efficiency of the underwater explosion test.

[0041] See also Figure 1 , Figure 4 The detection component 70 includes a wire displacement sensor 71 located on the water surface, a hook 72 connected to the tested plate 50, and a wire extension line 73. One end of the wire extension line 73 is connected to the wire displacement sensor 71, and the other end of the wire extension line 73 is connected to the hook 72. The wire extension line 73 is guided and tensioned in the water by a guide component 80.

[0042] See also Figure 4 The wire displacement sensor 71 is supported on the water surface by the beam body 11, and the hook 72 can be set at different positions of the measured plate 50 as needed. For concrete plates, it can be fixed by pre-embedding and the like, and for steel plates, it can be fixed by welding and the like.

[0043] See also Figure 4 The guide assembly 80 includes a tube body 81 and a pulley 82 arranged in the test chamber. The pull line extension line 73 passes through the tube body 81 and passes around the pulley 82 to be connected with the hook 72. There are multiple pulleys 82.

[0044] The guide assembly 80 can be arranged and distributed in the test chamber to adjust the position according to the test requirements, thereby changing the direction of the wire extension line 73 to meet different measurement conditions. The tube body 81 is arranged to ensure that the wire extension line 73 remains stable under the impact of the explosion, ensuring that the wire extension line 73 is not disturbed by the explosion shock wave, thereby ensuring the accuracy of the measured displacement data.

[0045] The measured plate 50 faces the underwater explosion source. When the explosion source explodes, the measured plate 50 is deformed by the stimulation of the explosion load, causing the pull wire extension line 73 to stretch or contract accordingly and transmit it to the pull wire displacement sensor 71. The pull wire displacement sensor 71 converts the stretching or contraction amount into an electrical signal and records it.

[0046] The guy wire displacement sensor 71 is located on the water surface. When the explosion source explodes, the plate 50 under test is deformed by the stimulation of the explosion load, causing the tensioned guy wire extension line 73 to stretch or contract accordingly. The guy wire displacement sensor 71 ensures that the tension of the guy wire extension line 73 remains unchanged, and outputs an electrical signal proportional to the moving distance of the guy wire extension line 73, thereby realizing real-time testing of the displacement of the underwater explosion structure.

[0047] It should be noted that when conducting underwater explosion tests, the detonation power of the explosion source used mainly acts on the tested plate 50 . The explosion source is far away from the inner wall of the shell box 10 and the lining plate 30 , and will not cause deformation to the inner wall of the shell box 10 and the lining plate 30 .

[0048] Example 2

[0049] See also Figure 2 The water transfer assembly 20 includes a pump source 21 installed on the shell box 10, one end of the pump source 21 extends to the test chamber, and the other end extends to the water storage chamber, which is used to transfer water from the test chamber to the water storage chamber.

[0050] The pump source 21 is preferably a suction pump, both ends of which are connected to pipelines, through which suction and delivery are carried out.

[0051] See also Figure 5 The water transfer component 20 also includes two sets of telescopic sources 22 installed on the shell box 10. The movable rods of each set of telescopic sources 22 are connected to a push plate 23, and a flexible covering sheet 24 is provided on the push plate 23. The movable rods of the telescopic sources 22 are extended, so that the push plate 23 pushes the liner 30 to compress the bag 31 to discharge the water into the test chamber, and the flexible covering sheet 24 is unfolded to cover the water surface of the test chamber to form a shield.

[0052] The telescopic source 22 is preferably an electric cylinder body, and the end of the flexible covering sheet 24 is connected to the inner wall of the shell box 10. The flexible covering sheet 24 is preferably made of stretchable materials such as plastic film. When the movable rod of the telescopic source 22 is retracted, the flexible covering sheet 24 is in a folded state, and the pull wire extension line 73 passes through the gap between the two groups of flexible covering sheets 24 without being interfered by the flexible covering sheets 24. After the explosion conditions in the test room are configured, the movable rod of the telescopic source 22 is controlled to extend to drive the push plate 23 to push the liner 30. The liner 30 compresses the bag 31 to discharge water into the test room to form the conditions for an underwater explosion. At the same time, as the movable rod of the telescopic source 22 extends, the flexible covering sheet 24 is unfolded, forming a barrier to the water splashing upward during the explosion, thereby preventing water from splashing out of the shell box 10 and reducing the waste of water resources.

[0053] Example 3

[0054] See also Figure 2 The traction assembly 40 includes guide rods 41 arranged on the housing box 10 . The guide rods 41 extend transversely and penetrate the housing box 10 . Each set of guide rods 41 is provided with a plurality of limit portions 42 .

[0055] After the explosion source explodes, water generates waves that impact the liner 30, pushing the liner 30 to move along the guide rod 41 to compress the bag 31 and then be limited by the limiting part 42. The liner 30 moves to expand the volume of the test chamber and discharge the water in the bag 31 upward into the test chamber, thereby suppressing the water fluctuations.

[0056] See also Figure 3 The limiting portion 42 includes a block 421 hinged on the guide rod 41, and a spring 422 is connected between the block 421 and the guide rod 41. When the lining plate 30 moves along the guide rod 41, the block 421 can be pressed down to pass through, and the block 421 is reset after the lining plate 30 passes through.

[0057] That is, after the explosion, water generates waves to impact the lining plate 30. After being impacted by the water waves, the lining plate 30 will move along the guide rod 41. When the lining plate 30 moves along the rod, the block 421 is pressed down to compress the spring 422. After the lining plate 30 is elastically forced by the spring 422, the block 421 is reset to prevent the lining plate 30 from moving backward. As a result, the lining plate 30 first compresses the bag 31 to absorb the impact force generated by the water waves, and secondly, the volume of the test chamber is expanded to increase the range of the water waves. Thirdly, the water in the bag 31 enters the test chamber to increase the total capacity of the water in the test chamber. The water waves after the explosion are quickly calmed down through these three aspects, which not only reduces the overflow caused by the water waves, but also allows the displacement state of the tested plate 50 caused by deformation to be observed in time.

[0058] Example 4

[0059] A method for testing the displacement of a structure under the action of an underwater explosion, comprising the following steps:

[0060] S1. Place the object to be tested in a container so that it faces the explosion source;

[0061] S2, connect the object to be measured to the extension cable 73, and inject water into the container to cover the object to be measured and the explosion source, so that the extension cable 73 passes through the water surface in a tensioned state and connects to the displacement sensor;

[0062] S3. Control the explosion source to explode, and the wire displacement sensor records the deformation of the object to be measured through the wire extension line 73.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing structural displacement under underwater explosion, characterized in that: It comprises a housing box (10), a water transfer assembly (20), a lining plate (30), a traction assembly (40), a plate to be tested (50), a support assembly (60) and a detection assembly (70) including a wire displacement sensor (71); The lining plate (30) is movably arranged relative to the wall of the shell box (10) through a traction assembly (40), and the lining plate (30) divides the space inside the shell box (10) into a water storage chamber and a test chamber; the support assembly (60) is arranged in the test chamber, and a test plate (50) is arranged on the support assembly (60), and the test plate (50) is located below the explosion source; the water transfer assembly (20) transfers water in the water storage chamber into the test chamber during the test, and transfers the water in the test chamber to the water storage chamber after the test is completed in stages; the wire displacement sensor (71) is arranged outside the water and connected to the test plate (50) through a wire extension line (73); when the explosion source explodes, the test plate is stimulated by the explosion load and deforms, causing the wire extension line (73) to expand or contract accordingly and transmit the expansion amount or contraction amount to the wire displacement sensor (71), and the wire displacement sensor (71) converts the expansion amount or contraction amount into an electrical signal and records it.

2. The displacement testing device according to claim 1, characterized in that: A bag (31) is arranged in the water storage chamber.

3. The displacement testing device according to claim 2, characterized in that: The water transfer assembly (20) comprises a pump source (21) mounted on the housing box (10), one end of the pump source (21) extending to the test chamber and the other end extending to the water storage chamber, for transferring water from the test chamber to the water storage chamber; The water transfer assembly (20) further comprises two sets of telescopic sources (22) mounted on the shell box (10), wherein a movable rod of the telescopic source (22) is connected to a push plate (23), and a flexible cover sheet (24) is arranged on the push plate (23). When the movable rod of the telescopic source (22) is extended, the push plate (23) pushes the liner (30) to compress the bag (31) to discharge water into the test chamber, and the flexible cover sheet (24) is unfolded to cover the water surface of the test chamber to form a shield.

4. The displacement testing device according to claim 3, characterized in that: The traction assembly (40) comprises at least one group of guide rods (41), and each group of guide rods (41) is provided with a plurality of limiting portions (42), and the limiting portions (42) are used to limit the position of the lining plate (30).

5. The displacement testing device according to claim 4, characterized in that: The limiting portion (42) comprises a groove arranged on the guide rod (41), a clamping block (421) and a spring (422); The clamping block (421) is wedge-shaped, the top end of the wedge is hinged to the guide rod (41), and a spring (422) is arranged between the bottom end of the clamping block (421) and the guide rod.

6. The displacement testing device according to claim 5, characterized in that: The support assembly (60) comprises a cushion seat (61) fixedly connected in the test chamber, a bracket (62) is detachably arranged above the cushion seat (61), and the tested plate (50) is arranged on the bracket.

7. The displacement testing device according to claim 6, characterized in that: The invention also comprises a guide assembly (80), a beam body (11) is arranged on the top of the shell box (10), a wire displacement sensor (71) is arranged on the beam body (11), a wire extension line (73) is connected to the measured plate (50) through a hook (72), the wire extension line (73) is guided and tensioned in water through the guide assembly (80), and the wire extension line (73) passes through the gap between the two sets of telescopic sources (22).

8. The displacement testing device according to claim 7, characterized in that: The guide assembly (80) comprises a tube body (81) and a pulley (82) arranged in the test chamber. The pull line extension line (73) passes through the tube body (81) and passes around the pulley (82) to be connected with the hook (72).

9. A method for displacement measurement using the testing device according to any one of claims 1 to 8, characterized in that: The steps include: Step (1): The object to be tested is fixedly placed in a bracket and is directed toward the explosion source; Step (2): the object to be measured is connected to the extension line of the pull wire, water covering the object to be measured and the explosion source is injected into the container, and the extension line of the pull wire passes through the water surface to connect to the pull wire displacement sensor; Step (3): Control the explosion source to explode, and the wire displacement sensor records the deformation of the object to be measured through the wire extension line.

10. The method according to claim 9, characterized in that In step (2), "injecting water into the container to cover the object to be tested and the explosion source" specifically comprises: controlling the movable rod of the telescopic source (22) to extend to drive the push plate (23) to push the lining plate (30), and the lining plate (30) compresses the bag (31) to discharge water into the test chamber to form water covering the object to be tested and the explosion source; at the same time, the movable rod of the telescopic source (22) extends to drive the flexible cover sheet (24) to unfold, thereby forming a barrier to the water splashed upward during the explosion.

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