Device and method for testing dynamic response of cylindrical shell under underwater explosion load

Abstract

The invention relates to the technical field of underwater explosion tests, in particular to a cylindrical shell dynamic response test device under an underwater explosion load and a test method. The test device comprises a steel structure test supporting frame, a sliding assembly and a mounting frame are arranged on the steel structure test supporting frame, the mounting frame is located in the middle of the sliding assembly, and a cylindrical initiating explosive device is arranged in the mounting frame; the fixing assemblies are arranged at the two ends of the steel structure test supporting frame, each fixing assembly comprises a fixing bottom plate, an intersection angle reference arrow and an angle adjusting piece, the angle adjusting pieces are arranged on the sliding assemblies and connected with the fixing bottom plates, the intersection angle reference arrows are arranged at the bottoms of the fixing bottom plates, and test cylindrical shells are arranged on the fixing bottom plates; the explosion source center of the cylindrical initiating explosive device and the center of the test cylindrical shell are located on the same horizontal plane. According to the test device, the explosion distance and the intersection angle between the cylindrical shell and the cylindrical initiating explosive device can be accurately controlled in the underwater explosion test, and the problem that parameters of the explosion distance and the intersection angle are difficult to control in an existing test is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of underwater explosion testing, and in particular to a test device and a test method for dynamic response of a cylindrical shell under underwater explosion load. Background Art

[0002] As an important economic resource and trade channel, the ocean plays an important role. Faced with increasingly fierce competition for marine resources, the investment in underwater testing research and development is increasing. In this context, it is particularly important to master underwater testing methods and have underwater testing capabilities.

[0003] In the research of underwater tests, the dynamic response characteristics of marine structures under underwater explosion loads are hot and difficult issues. This type of research can not only evaluate the structural damage characteristics, thereby optimizing the structural geometry, but also study the shock waves and bubble pulsation load characteristics generated by underwater explosions, which helps to understand the temporal and spatial characteristics of underwater explosion loads, provide a scientific basis for underwater tests, and promote the advancement of marine engineering technology.

[0004] Underwater explosion tests often require research on the response characteristics of marine structures under different explosion distances, intersection angles and other parameters, which requires strict control of the accuracy of parameters such as explosion distance and intersection angle that have an important impact on the test results. However, in actual test operations, due to the complex underwater environment and poor visibility conditions, it is difficult to accurately control the explosion distance and intersection angle parameters, which has become an urgent problem to be solved.

[0005] The problem to be solved by this patent is how to accurately control the explosion distance and intersection angle parameters between the cylindrical shell structure and the cylindrical pyrotechnics during underwater explosion tests. Summary of the invention

[0006] Therefore, the present invention provides a test device and a test method for dynamic response of a cylindrical shell under underwater explosion load.

[0007] In order to solve the above technical problems, the present invention provides a cylindrical shell dynamic response test device under underwater explosion load, including: a steel structure test support frame, which is arranged on the steel structure test support frame, and the mounting frame is located in the middle of the sliding component, and the cylindrical pyrotechnic is arranged in the mounting frame; a fixed component, which is arranged at both ends of the steel structure test support frame, and the fixed component includes a fixed base plate and an intersection angle reference arrow, and an angle adjustment member, the angle adjustment member is arranged on the sliding component and connected to the fixed base plate, the intersection angle reference arrow is arranged at the bottom of the fixed base plate, and a test cylindrical shell is arranged on the fixed base plate, and the explosion source center of the cylindrical pyrotechnic is in the same horizontal plane as the center of the test cylindrical shell; a counterweight assembly, which is arranged on the fixed base plate.

[0008] Furthermore, the angle adjustment member includes a dial, a stud and a nut. The dial is arranged on the sliding assembly. The stud is arranged on the dial. The stud passes through the fixed base plate and is connected to the nut.

[0009] Furthermore, the sliding assembly includes a slideway and a slider, the slideway is arranged on the steel structure test support frame, the slider is arranged in the slideway, and the slider is connected to the dial.

[0010] Furthermore, the mounting frame is a prism and is made of a plurality of high-strength metal round tubes. Two supporting transverse tubes are provided at the bottom of the mounting frame. The columnar pyrotechnic product is located in the mounting frame and is arranged on the supporting transverse tubes.

[0011] Furthermore, the mounting frame is provided with a plurality of tightening belts, and the tightening belts are used to fix the columnar pyrotechnic product.

[0012] Furthermore, the fixing assembly also includes a connecting seat and a lower clamp and an upper clamp; the connecting seat is arranged on the fixed base plate, the connecting seat is provided with a lower clamp, the upper clamp is arranged on the lower clamp, and the test cylindrical shell is located between the upper clamp and the lower clamp.

[0013] Furthermore, the counterweight assembly includes a counterweight socket and a plurality of strip-shaped counterweight blocks, the counterweight socket is located at both ends of the fixed base plate, and the plurality of strip-shaped counterweight blocks are inserted into the counterweight socket.

[0014] Furthermore, a plurality of blocking rings are provided on both sides of the steel structure test support frame, and the blocking rings are used to prevent the fixing assembly from rotating on the horizontal plane of the steel structure test support frame.

[0015] Furthermore, a plurality of lifting ears are provided at intervals on both sides of the steel structure test support frame, and the lifting ears are connected to the steel wire rope.

[0016] The present invention also provides a test method using the cylindrical shell dynamic response test device under underwater explosion load, comprising: placing a cylindrical pyrotechnic on a mounting frame of the pyrotechnic, the explosion source center of the cylindrical pyrotechnic and the center of the test cylindrical shell are on the same horizontal plane, so that the explosion source center is directly opposite to the explosion-facing surface of the test cylindrical shell, using a sliding component to move the test cylindrical shell fixing component, and when the center of the test cylindrical shell and the center of the cylindrical pyrotechnic meet the explosion distance requirement of the test, stop moving; then, rotate the test cylindrical shell fixing component, observe the intersection angle reference arrow below the fixed bottom plate, compare the intersection angle reference arrow with the scale of the dial, determine the rotation angle, and accurately adjust its intersection angle. After the angle adjustment is completed, use a crane to directly hoist the test device to the surface of the designated operating water area, and immerse the entire device in a fixed water depth, so that the dynamic response test of the cylindrical shell under the underwater explosion load can be carried out. After the test is completed, the hoisting platform moves the test device as a whole to the water surface. After the test device is transported as a whole to the shore, the dynamic response of the test cylindrical shell under the underwater explosion load can be observed.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The cylindrical shell dynamic response test device under underwater explosion load can realize relatively complex cylindrical shell underwater explosion operations. The steel structure test support frame of the test device is welded by high-strength metal round pipes as a whole, and has a large structural strength.

[0019] 2. The cylindrical shell dynamic response test device under underwater explosion load is equipped with a sliding assembly. The slider can change the explosion distance between the test cylindrical shell and the cylindrical pyrotechnic by moving on the slide. It can not only accurately determine the explosion distance parameters, but also avoid the change of the relative distance parameters between the test cylindrical shell and the cylindrical pyrotechnic due to fluid movement during the underwater explosion test. It has a simple structure and is easy to operate.

[0020] 3. The test device for dynamic response of cylindrical shell under underwater explosion load is equipped with a dial and an intersection angle reference arrow, which can accurately control the intersection angle between the test cylindrical shell and the cylindrical pyrotechnics, effectively avoiding the problem of difficult control of intersection angle parameters in existing tests, reducing test errors and facilitating operation.

[0021] 4. The cylindrical shell dynamic response test device under underwater explosion load is provided with a counterweight assembly. By calculating the gravity and buoyancy of each test cylindrical shell, the position and mass of the counterweight assembly are determined on the premise that the test device can be immersed in water horizontally as a whole. This can not only prevent the test device from being unable to be immersed in the specified water depth due to its own large buoyancy, but also can maintain the device in a horizontal posture underwater by adding or reducing the counterweight according to the gravity and buoyancy parameters of the test device. It is easy to operate and has strong controllability.

[0022] 5. The test device can simultaneously conduct underwater explosion dynamic response tests of up to two test cylindrical shells under different explosion distances and intersection angles, saving test costs, reducing the risks of multiple tests, and improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0025] Figure 2 A schematic diagram of the structure of the pyrotechnic device mounting frame of the cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0026] Figure 3 A bottom view of the pyrotechnic device mounting frame structure of the cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0027] Figure 4 A schematic diagram of a steel structure test support frame structure of a cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0028] Figure 5 A schematic diagram of the slideway structure of a cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0029] Figure 6 A schematic diagram of the scale plate structure of a cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0030] Figure 7 A schematic diagram of the structure of the fixing components of the cylindrical shell dynamic response test device under underwater explosion load provided by the present invention;

[0031] Figure 8 A bottom view of the fixing assembly structure of the cylindrical shell dynamic response test device under underwater explosion load provided by the present invention.

[0032] Description of reference numerals:

[0033] 1. Fixed base plate; 2. Connecting seat; 3. Lower clamp; 4. Test cylindrical shell; 5. Upper clamp; 6. Counterweight socket; 7. Bar counterweight block; 8. Slider; 9. Slide; 10. Dial; 11. Nut; 12. Blocking ring; 13. Lifting ear; 14. Wire rope; 15. Columnar pyrotechnics; 16. Tightening belt; 17. High-strength metal round tube; 18. Round hole; 19. Reference arrow for intersection angle; 20. Stud; 21. Mounting frame; 22. Support cross tube. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] See also Figures 1 to 8 As shown, the present invention provides a cylindrical shell dynamic response test device under underwater explosion load, comprising: a steel structure test support frame, the sliding component and the mounting frame 21 are arranged on the steel structure test support frame, the mounting frame 21 is located in the middle of the sliding component, and the columnar pyrotechnic product 15 is arranged in the mounting frame 21; a fixed component, which is arranged at both ends of the steel structure test support frame, and the fixed component includes a fixed base plate 1 and an intersection angle reference arrow 19, and an angle adjustment member, the angle adjustment member is arranged on the sliding component and connected to the fixed base plate 1, the intersection angle reference arrow 19 is arranged at the bottom of the fixed base plate 1, a test cylindrical shell 4 is arranged on the fixed base plate 1, and the explosion source center of the columnar pyrotechnic product 15 and the center of the test cylindrical shell 4 are in the same horizontal plane; a counterweight assembly, which is arranged on the fixed base plate 1.

[0037] The test device for dynamic response of cylindrical shell under underwater explosion load is equipped with a sliding component, through which the explosion distance between the test cylindrical shell 4 and the cylindrical pyrotechnics 15 can be changed, which can not only accurately determine the explosion distance parameters, but also avoid the change of the relative distance parameters between the test cylindrical shell 4 and the cylindrical pyrotechnics 15 due to fluid movement during the underwater explosion test. The structure is simple and easy to operate. Through the test device, the test cylindrical shell 4 is immersed to a specified water depth, so that the explosion source center of the cylindrical pyrotechnics 15 and the center of the test cylindrical shell 4 are on the same horizontal plane, and the explosion distance and intersection angle parameters can be accurately controlled, which avoids the influence of fluid movement on the above parameters to the greatest extent, resulting in the inability to carry out experimental research according to the test requirements, and provides support for related experimental research. At the same time, the test device is equipped with a dial 10 and an intersection angle reference arrow 19, which can accurately control the intersection angle between the test cylindrical shell 4 and the cylindrical pyrotechnics 15, effectively avoiding the problem that the intersection angle parameters are difficult to control in existing tests, can reduce test errors and is easy to operate. By calculating the gravity and buoyancy of each test cylindrical shell 4, a counterweight assembly is set up. The position and mass of the counterweight assembly are determined under the premise that the test device can be immersed in water horizontally as a whole. This can not only prevent the test device from being unable to be immersed in the specified water depth due to its own large buoyancy, but also can maintain the device in a horizontal posture underwater by adding or reducing the counterweight according to the gravity and buoyancy parameters of the test device. It is easy to operate and has strong controllability.

[0038] The test device is centered on a columnar pyrotechnic device 15, and has a test cylindrical shell 4 structure on both sides of the pyrotechnic device, so that different explosion distances and intersection angles can be adjusted independently on both sides of the device. This not only improves the stability of the test device, but also can simultaneously carry out underwater explosion load dynamic response tests of up to two test cylindrical shells 4 under different explosion distances and intersection angles, saving test costs, reducing the risks of multiple tests and improving test efficiency.

[0039] If the length of the test cylindrical shell 4 is l, the overall length of the fixing assembly is 0.75l-0.95l, and the overall width of the fixing assembly is 1.1-1.3 times the diameter of the test cylindrical shell 4.

[0040] The intersection angle reference arrow 19 is connected to the fixed base plate 1 by welding, and is welded to the bottom of the fixed base plate 1. The length of the middle blank area of ​​the intersection angle reference arrow 19 is slightly larger than the diameter of the dial 10.

[0041] In some optional embodiments, the angle adjustment member includes a dial 10, a stud 20, and a nut 11. The dial 10 is arranged on the sliding assembly, the stud 20 is arranged on the dial 10, and the stud 20 passes through the fixed base plate 1 and is connected to the nut 11.

[0042] By setting the dial 10 on the sliding assembly, the connection between the dial 10 and the sliding assembly is achieved. At the same time, the stud 20 is set on the dial 10 to achieve the connection between the stud 20 and the fixed base plate 1. The nut 11 is then connected to the stud 20 to complete the connection between the dial 10 and the fixed base plate 1 and the sliding assembly.

[0043] In actual use, according to the test requirements, on the steel structure test support frame, the fixed component can be rotated with the stud 20 as the axis, and the intersection angle reference arrow 19 below the test fixed base plate 1 is observed. The intersection angle reference arrow 19 is compared with the scale of the dial 10 to determine the rotation angle, and the intersection angle of the dial 10 is accurately adjusted. After the angle adjustment is completed, the nut 11 is installed on the stud 20.

[0044] This nut 11 is specially thickened and widened, and has greater strength than ordinary nut 11, so that the fixing component can be tightly attached to the steel structure test support frame without changing its position due to various complex environments such as underwater fluid movement.

[0045] The sliding assembly includes a slideway 9 and a slider 8 . The slideway 9 is arranged on the steel structure test support frame. The slider 8 is arranged in the slideway 9 , and the slider 8 is connected to the dial 10 .

[0046] The sliding assembly is welded into the middle part of the steel structure test support frame to form a whole. The length of the sliding assembly is Figure 1 The length of the middle blank area of ​​the steel structure test support frame is kept consistent, and the width of the sliding component is smaller than the middle blank area of ​​the steel structure test support frame, which is about 0.6 to 0.8 times of the middle blank area.

[0047] The slider 8 is connected to the slideway 9 by a wedge-shaped slot, and a certain gap is left in the middle to reduce the friction resistance of the slider 8 sliding on the slideway 9. The slider 8 can slide freely on the slideway 9. The upper end of the slider 8 is slightly higher than the slideway 9 to prevent the scale plate 10 from contacting the slideway 9 and generating friction resistance. The slider 8 is embedded with a stud 20, which extends upward for a certain length, and the upper end is designed with a thread for installing the nut 11. The scale plate 10 is connected to the stud 20 on the slider 8, and the middle is hollowed out with a size matching the stud 20. The diameter of the scale plate 10 is 1.0 to 1.2 times the width of the slideway 9. The scale plate 10 is inserted on the stud 20, and the position of the scale plate 10 is rotated to make the 0° and 180° scale connection line coincide with the axis direction of the slideway 9, and then the scale plate 10 is welded and fixed so that it cannot rotate.

[0048] In this embodiment, the steel structure test support frame is welded by high-strength metal round tubes 17, and the round tubes can be made of Q235 or Q345 steel. The overall length L and width B of the steel structure test support frame are determined by the geometric dimensions of the test cylindrical shell 4 and the test working condition parameters. If the test specifies that the explosion distance is d, the overall length L of the support frame is 2.0d~3.0d; if the length of the test cylindrical shell 4 is l, the overall width B of the support frame is 0.8l~1.2l.

[0049] The steel structure test support frame includes an upper layer, a lower layer and a middle support rod, wherein the number and size of the high-strength metal circular tubes 17 for the upper and lower layers for transverse and longitudinal support are designed according to the total weight of the test cylindrical shell 4, the amount of pyrotechnics, the explosion distance, hoisting, etc. In order to ensure the continuity of the structure of the high-strength metal circular tubes 17 for longitudinal support and that the test cylindrical shell 4 does not fall into the water during the test, the number of longitudinal support circular tubes can be designed to be four.

[0050] The mounting frame 21 is a prism and is made of a plurality of high-strength metal round tubes 17 . Two supporting transverse tubes 22 are provided at the bottom of the mounting frame 21 . The columnar pyrotechnics 15 are located in the mounting frame 21 and are arranged on the supporting transverse tubes 22 .

[0051] High-strength metal round tubes 17 of different sizes constitute various parts of the steel structure test support frame, and 14 high-strength metal round tubes 17 form a mounting frame 21 for the columnar pyrotechnics 15, including two supporting cross tubes 22; the columnar pyrotechnics 15 are arranged in the mounting frame 21, and the columnar pyrotechnics 15 are placed on the two supporting cross tubes 22 of the mounting frame 21.

[0052] Meanwhile, a plurality of tightening belts 16 are provided on the mounting frame 21, and the tightening belts 16 are used to fix the columnar pyrotechnics 15. The columnar pyrotechnics 15 are fixed by tightening belts 16, and four tightening belts 16 are respectively fixed on four columns of the mounting frame 21, thereby increasing the fixing stability of the columnar pyrotechnics 15.

[0053] Among them, the fixing assembly also includes a connecting seat 2, a lower clamp 3 and an upper clamp 5; the connecting seat 2 is arranged on the fixed base plate 1, the connecting seat 2 is provided with a lower clamp 3, the upper clamp 5 is arranged on the lower clamp 3, and the test cylindrical shell 4 is located between the upper clamp 5 and the lower clamp 3.

[0054] The length of the middle blank area of ​​the intersection angle reference arrow 19 is slightly larger than the diameter of the dial 10, and the height extends to the same horizontal plane as the bottom surface of the connecting seat 2. The fixed base plate 1 and the connecting seat 2 are connected by a jack and welded, and the connecting seat 2 is welded and fixed to the lower clamp 3. The assembled fixing components are placed on the steel structure test support frame, the test cylindrical shell 4 is placed on the lower clamp 3, and then the upper clamp 5 is covered, and the upper clamp 5 and the lower clamp 3 are fixed with screws. A rubber gasket is added to the screw hole between the lower clamp 3 and the upper clamp 5, which can play a certain buffering role in the collision between the upper clamp 5 and the lower clamp 3, reduce the deformation of the upper and lower clamps 3, and increase the stability of the structure.

[0055] Specifically, the length of the clamp is 1.1 to 1.3 times the diameter of the test cylindrical shell 4, and the width is 1 / 10l to 1 / 12l. The clamp is made of high-strength material and the thickness of the clamp is increased as much as possible to ensure reliable fixed connection without breaking under underwater explosion load, so that it can be reliably fixed without causing large deformation and damage under large underwater explosion load.

[0056] A circular hole 18 is provided in the middle of the fixed base plate 1, and the stud 20 passes through the circular hole 18. The circular hole 18 of the fixed base plate 1 is placed on the stud 20 on the slider 8, so that the stud 20 is connected to the fixed base plate 1.

[0057] In some optional embodiments, the counterweight assembly includes a counterweight socket 6 and a plurality of bar-shaped counterweight blocks 7 , wherein the counterweight socket 6 is located at both ends of the fixed base plate 1 , and the plurality of bar-shaped counterweight blocks 7 are inserted into the counterweight socket 6 .

[0058] The counterweight socket 6 is welded to the top of the test fixed base plate 1. Bar counterweight blocks 7 of different sizes can be inserted into the counterweight socket 6. The bar counterweight blocks 7 are all solid iron blocks. The horizontal posture of the test device can be adjusted by adding or reducing the bar counterweight blocks 7 to avoid the test device being unable to maintain a horizontal posture and tilting due to the different weights at the head and tail of the test cylindrical shell 4.

[0059] In some optional embodiments, a plurality of blocking rings 12 are provided at both ends of the steel structure test support frame, and the blocking rings 12 are used to prevent the fixing assembly from rotating on the horizontal plane of the steel structure test support frame.

[0060] After the explosion distance and intersection angle parameters are determined according to the specific test requirements, a blocking ring 12 is installed at the connection between the connection seat 2 of the fixed component and the high-strength metal round tube 17. The blocking ring 12 is thicker and has higher strength;

[0061] Specifically, eight blocking rings 12 are provided at both ends of the steel structure test support frame. The eight blocking rings 12 can effectively prevent the fixing assembly from rotating on the horizontal plane of the steel structure test support frame and prevent the intersection angle from changing.

[0062] Specifically, a plurality of lifting ears 13 are provided at intervals on both sides of the steel structure test support frame, and the lifting ears 13 are connected to the steel wire rope 14 .

[0063] By welding four lifting ears 13 embedded in the load-bearing structures on both sides of the steel structure test support frame, the lifting ears 13 are connected to the steel wire rope 14, and the upper end of the steel wire rope 14 is connected to the lifting equipment, the test device can be lifted into and out of the water.

[0064] The eight lifting ears 13 are embedded and fixed in the load-bearing structure of the steel structure test support frame. The lifting ears 13 are forged with high-strength materials and meet the lifting strength requirements, so as to increase the stability of the connection and prevent the lifting ears 13 from breaking when the test device is lifted into or out of water. One end of the steel wire rope 14 is connected to the lifting ear 13, and the other end is connected to the lifting equipment. The steel wire rope 14 and the lifting ear 13 are connected with a snap buckle to increase stability and prevent the steel wire rope 14 from falling off when the test device is lifted into or out of water.

[0065] The present invention also provides a test method for the cylindrical shell dynamic response test device under underwater explosion load, comprising: placing a cylindrical pyrotechnic 15 on a pyrotechnic mounting frame 21, with the explosion source center of the cylindrical pyrotechnic 15 and the center of the test cylindrical shell 4 on the same horizontal plane, so that the explosion source center faces the explosion-facing surface of the test cylindrical shell 4, using a sliding component to push a fixed component, and stopping the movement when the center of the test cylindrical shell 4 and the center of the cylindrical pyrotechnic 15 meet the explosion distance requirements of the test; then, rotating the fixed component to observe the fixed bottom plate 1 below. The intersection angle reference arrow 19 is used to compare the intersection angle reference arrow 19 with the scale of the dial 10 to determine the rotation angle and accurately adjust the intersection angle. After the angle adjustment is completed, the test device is directly hoisted to the surface of the designated operating waters by a crane and immersed in a fixed water depth as a whole to carry out the dynamic response test of the cylindrical shell under the underwater explosion load. After the test is completed, the hoisting platform moves the test device as a whole to the water surface. After the test device is transported to the shore as a whole, the dynamic response of the test cylindrical shell 4 under the underwater explosion load can be observed.

[0066] The specific working method of the cylindrical shell dynamic response test device under underwater explosion load is as follows:

[0067] First, place the cylindrical pyrotechnic 15 on the mounting frame 21 of the pyrotechnic, so that the explosion source center of the cylindrical pyrotechnic 15 and the center of the test cylindrical shell 4 are on the same horizontal plane, so that the explosion source center is facing the explosion surface of the test cylindrical shell 4. According to the test requirements, use the sliding assembly on the steel structure test support frame to push the slider 8 and the fixed assembly connected thereto. When the center of the test cylindrical shell 4 and the center of the cylindrical pyrotechnic 15 meet the explosion distance requirements of the test, stop moving;

[0068] Then, according to the test requirements, the fixed component is rotated on the steel structure test support frame with the stud 20 as the axis, and the intersection angle reference arrow 19 below the fixed base plate 1 is observed. The intersection angle reference arrow 19 is compared with the scale of the dial 10 to determine the rotation angle and accurately adjust the intersection angle. After the angle adjustment is completed, the nut 11 is installed on the upper end of the stud 20. This nut 11 is specially thickened and widened, and has greater strength than the ordinary nut 11, so that the fixed component can be tightly attached to the steel structure test support frame without changing its position due to various complex environments such as underwater fluid movement. After determining the explosion distance and intersection angle parameters according to the specific test requirements, the fixing component is installed at the connection seat 2 of the fixed component and the connection of the round pipe. Blocking rings 12 are installed. The blocking rings 12 are thick and have high strength, so that the eight blocking rings 12 can effectively prevent the fixed components from rotating on the horizontal plane of the steel structure test support frame and prevent the intersection angle from changing. Lifting ears 13 are installed on both sides of the structure. The eight lifting ears 13 are embedded and fixed in the load-bearing structure of the steel structure test support frame. The lifting ears 13 are forged with high-strength materials and meet the lifting strength requirements, so as to increase the stability of the connection and prevent the lifting ears 13 from breaking when the test device is lifted into or out of water. One end of the steel wire rope 14 is connected to the lifting ear 13, and the other end is connected to the lifting equipment. The steel wire rope 14 and the lifting ear 13 are connected with a snap buckle to increase stability and prevent the steel wire rope 14 from falling off when the test device is lifted into or out of water.

[0069] The implementation process of the cylindrical shell dynamic response test device under underwater explosion load is as follows: first design and process the steel structure test support frame, and embed the sliding assembly into the steel structure test support frame and weld the slider 8, the stud 20 and the dial 10 on the slide 9 in sequence. When welding the dial 10, pay attention to the angle, so that the connection direction of the 0° and 180° scales on the dial 10 coincides with the axial direction of the slide 9;

[0070] Weld the intersection angle reference arrow 19 to the lower bottom plate of the fixed assembly, the lower bottom plate of the fixed assembly, the connecting seat 2 and the lower clamp 3 for welding and fixing, then assemble the installed assembly and the separate cylindrical shell, the upper clamp 5, the bolts, the nuts 11 and other parts, put the fixed assembly on the dial 10 connected to the stud 20, connect them in sequence, and fix the lower clamp 3, the test cylindrical shell 4 and the upper clamp 5 with the bolts and nuts 11;

[0071] Adjust the explosion distance and the intersection angle according to the test requirements. After the explosion distance and the intersection angle are adjusted, install the nut 11 on the upper end of the stud 20, and install the blocking ring 12 at the connection between the connecting seat 2 of the fixed component and the high-strength metal round tube 17. Embed the welded lifting lug 13 in the load-bearing structure of the steel structure test support frame, and the lifting lug 13 is connected to the wire rope 14 by a snap-fit ​​method; under the premise of ensuring that the test device enters the water, add or remove the counterweight block to adjust the horizontal posture of the device to form a complete test device.

[0072] When the test device is used for testing, one end of the wire rope 14 is connected to the test device lifting ear 13, and the other end is connected to the crane. The crane directly lifts the test device to the surface of the designated operating water area. After the columnar pyrotechnics 15 are installed and fixed in this area, the entire test device is immersed in a fixed water depth by the crane.

[0073] If the crane cannot directly lift the test device to the operating waters, first lift the test device onto the surface transfer platform, loosen the wire rope 14 on the crane hook, and use the test tugboat to move the surface transfer platform to the surface operating lifting platform, connect the wire rope 14 at one end of the test device to the surface operating lifting platform, and lift the test device upwards on the device on the surface operating lifting platform. After the surface transfer platform is separated from the test device, the test tugboat moves the surface transfer platform, and then the surface operating lifting platform lowers the test device down to the surface of the operating waters. After installing and fixing the columnar pyrotechnics 15 in this area, the surface operating lifting platform immerses the entire test device in a fixed water depth.

[0074] After fixing the lifting platform, the dynamic response test of the cylindrical shell under underwater explosion load can be carried out. After the test, the lifting platform moves the test device as a whole to the water surface. After the test device is transported to the shore as a whole, the dynamic response of the test cylindrical shell under underwater explosion load can be observed.

[0075] The above implementation steps are the core idea of ​​the patent of this invention. For technical and engineering personnel in this field, modifications and improvements can be made based on the core idea of ​​the invention, such as using a counterweight block as a whole to replace the cylindrical shell on one side, so that the test device can maintain a horizontal posture for testing. These modifications and improvements are also within the scope of protection of the patent of this invention.

Claims

1. A test device for dynamic response of cylindrical shell under underwater explosion load, characterized in that: include: A steel structure test support frame, a sliding assembly and a mounting frame (21) are arranged on the steel structure test support frame, the mounting frame (21) is located in the middle of the sliding assembly, and a columnar pyrotechnic device (15) is arranged in the mounting frame (21); A fixed assembly is arranged at both ends of the steel structure test support frame, the fixed assembly comprises a fixed base plate (1), an intersection angle reference arrow (19), and an angle adjustment member, the angle adjustment member is arranged on the sliding assembly and connected to the fixed base plate (1), the intersection angle reference arrow (19) is arranged at the bottom of the fixed base plate (1), a test cylindrical shell (4) is arranged on the fixed base plate (1), and the explosion source center of the columnar pyrotechnic (15) and the center of the test cylindrical shell (4) are in the same horizontal plane; A counterweight assembly is arranged on the fixed base plate (1).

2. The cylindrical shell dynamic response test device under underwater explosion load according to claim 1 is characterized in that: The angle adjustment member comprises a dial (10), a stud (20) and a nut (11); the dial (10) is arranged on the sliding assembly; the stud (20) is arranged on the dial (10); the stud (20) passes through the fixed base plate (1) and is connected to the nut (11).

3. The test device for dynamic response of cylindrical shell under underwater explosion load according to claim 2, characterized in that: The sliding assembly comprises a slideway (9) and a slider (8), wherein the slideway (9) is arranged on the steel structure test support frame, the slider (8) is arranged in the slideway (9), and the slider (8) is connected to a dial (10).

4. A cylindrical shell dynamic response test device under underwater explosion load according to claim 2 or 3, characterized in that: The mounting frame (21) is a prism and is made of a plurality of high-strength metal round tubes (17). Two supporting transverse tubes (22) are provided at the bottom of the mounting frame (21). The columnar pyrotechnic device (15) is located in the mounting frame (21) and is arranged on the supporting transverse tubes (22).

5. The test device for dynamic response of cylindrical shell under underwater explosion load according to claim 4, characterized in that: The mounting frame (21) is provided with a plurality of tightening belts (16), and the tightening belts (16) are used to fix the columnar explosive device (15).

6. The cylindrical shell dynamic response test device under underwater explosion load according to claim 5, characterized in that: The fixing assembly further comprises a connecting seat (2), a lower clamp (3) and an upper clamp (5); the connecting seat (2) is arranged on the fixing base plate (1), the connecting seat (2) is provided with a lower clamp (3), the upper clamp (5) is arranged on the lower clamp (3), and the test cylindrical shell (4) is located between the upper clamp (5) and the lower clamp (3).

7. The test device for dynamic response of cylindrical shell under underwater explosion load according to claim 6, characterized in that: The counterweight assembly comprises a counterweight insertion hole (6) and a plurality of bar-shaped counterweight blocks (7); the counterweight insertion hole (6) is located at two ends of the fixed base plate (1); and the plurality of bar-shaped counterweight blocks (7) are inserted into the counterweight insertion hole (6).

8. The test device for dynamic response of cylindrical shell under underwater explosion load according to claim 1, characterized in that: A plurality of blocking rings (12) are provided at both ends of the steel structure test support frame, and the blocking rings (12) are used to prevent the fixing assembly from rotating on the horizontal plane of the steel structure test support frame.

9. The cylindrical shell dynamic response test device under underwater explosion load according to claim 1, characterized in that: A plurality of lifting ears (13) are arranged at intervals on both sides of the steel structure test support frame, and the lifting ears (13) are connected to steel wire ropes (14).

10. A test method using the cylindrical shell dynamic response test device under underwater explosion load according to any one of claims 1 to 9, characterized in that: include: Place the cylindrical pyrotechnic device (15) on the mounting frame (21) of the pyrotechnic device, so that the explosion source center of the cylindrical pyrotechnic device (15) and the center of the test cylindrical shell (4) are on the same horizontal plane, so that the explosion source center faces the explosion-facing surface of the test cylindrical shell (4), and use the sliding component to push the fixed component. When the center of the test cylindrical shell (4) and the center of the cylindrical pyrotechnic device (15) meet the explosion distance requirements of the test, stop moving; then, rotate the fixed component and observe the intersection angle reference arrow (19) below the fixed bottom plate (1) to make The intersection angle reference arrow (19) is compared with the scale of the dial (10) to determine the rotation angle, and the intersection angle is accurately adjusted. After the angle adjustment is completed, the test device is directly hoisted to the surface of the designated operating water area by a crane and immersed in a fixed water depth as a whole to carry out the dynamic response test of the cylindrical shell under the underwater explosion load. After the test is completed, the hoisting platform moves the test device as a whole to the water surface. After the test device is transported as a whole to the shore, the dynamic response of the test cylindrical shell (4) under the underwater explosion load can be observed.

Images