A system for simulating a head-on impact of a fragile cap by a punch

Abstract

The utility model discloses a kind of cover impact test systems of simulating head cone impact fragile cover, including cover impact test device;Cover impact test device, for the head cone with preset mass and preset speed impact fragile cover;Cover impact test device, including bottom plate, guide frame assembly, head cone impact platform and fragile cover installation platform;The top of bottom plate is provided with guide frame assembly and fragile cover installation platform;Head cone impact platform is set on guide frame assembly;Frangible cover installation platform is located directly below head cone impact platform.In addition, the cover impact test system of the utility model further includes high-speed photography system, impact force test system and hoist release system.The utility model's cover impact test system, can simulate head cone with certain mass and real speed impact fragile cover, can more truly verify whether fragile cover is according to predetermined form cracking, verify whether head cone structure appears damage, can also obtain the dynamic impact force that head cone bears, with great practical significance.

Description

Technical Field

[0001] This utility model relates to the field of aerospace mechanical environment testing technology, and in particular to a cap impact test system that simulates the impact of a head cone on a fragile cap. Background Technology

[0002] Modern rocket launcher tanks often employ a fragility-protected design for their front end caps to protect the rocket warhead, guidance system, or engine from environmental factors (such as dust and moisture during storage and transportation) or the impact of the exhaust gas flow during launch. Furthermore, during hot launch, the engine ignites directly inside the tank, propelling the rocket's nose cone to quickly break through the fragility-protected cap, ensuring the rocket's smooth passage while minimizing interference with the projectile body and maintaining its flight stability.

[0003] During the rocket's nose cone impact test, to ensure mission reliability during launch, the fragility cover must rupture in a predetermined manner at launch to avoid generating dangerous fragments, while simultaneously preventing structural damage to the rocket's nose cone. Therefore, impact tests are necessary to verify the accuracy of both the nose cone and the fragility cover.

[0004] Current traditional methods for testing the impact cap mostly involve slowly extending a hydraulic cylinder to push the nose cone through the vulnerable cap. These methods are static loading methods and fail to realistically simulate the rapid impact process of the actual rocket nose cone. Furthermore, the impact force obtained by these methods is a static force, not the dynamic impact force actually experienced by the nose cone, thus leading to a significant deviation between the test data and actual operating conditions.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a cap-impact testing system that simulates the impact of a cone on a fragile cap.

[0007] Therefore, this utility model provides a cap-punching test system for simulating head cone impact on fragile caps, including a cap-punching test device; A cap impact testing device is used to impact a fragile cap with a pre-set mass and a pre-set speed using a cone. The cap-punching test apparatus includes a base plate, a guide frame assembly, a head cone impact table, and a fragile cap mounting table; The top of the base plate is equipped with a guide frame assembly and a fragile cover mounting platform; The guide frame assembly is equipped with a head cone impact platform; The fragile cover mounting platform is located directly below the head cone impact platform.

[0008] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a cap-breaking test system that simulates the impact of a head cone on a fragile cap. The design is scientific. This utility model is a cap-breaking test system that can realistically simulate the impact of a head cone on a fragile cap. This test system simulates the impact of a head cone on a fragile cap with a certain mass and a realistic speed, which can more realistically verify whether the fragile cap cracks according to the predetermined shape and whether the head cone structure is damaged. It has significant practical significance.

[0009] Furthermore, by applying this invention, the dynamic impact force borne by the head cone can also be obtained simultaneously. Attached Figure Description

[0010] Figure 1 A three-dimensional structural diagram of a cap-punching test system for simulating head cone impact on a fragile cap provided by this utility model; Figure 2 Rear view of a test system for simulating head cone impact on a fragile cap provided by this utility model; In the diagram: 1-Base plate; 2-Left guide frame; 3-Right guide frame; 4-Left guide shaft; 5-Right guide shaft; 6-Left side rubber buffer pad; 7-Right side rubber buffer pad; 8-Upper left guide shaft support; 9-Lower left guide shaft support; 10-Upper right guide shaft support; 11-Lower right guide shaft support; 12-Left middle platform; 13-Right middle platform; 14-Left cover plate; 15-Right cover plate; 16-Left side guard bar; 17-Right side guard bar; 18-Front crossbeam; 19-Rear crossbeam; 20-Impact platform; 21-Left linear bearing; 22-Right linear bearing; 23-Counterweight; 24-Force sensor; 25-Head cone connecting column; 26-Head cone; 27-Mounting frame; 28-Mounting plate; 29-Fragile cover; 30-Lifting ring; 31-Shackle; 32-Unhooking device. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0013] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0014] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0015] See Figures 1 to 2 This utility model provides a cap-punching test system for simulating head cone impact on a fragile cap, including a cap-punching test device, a high-speed photography system, an impact force testing system, and a lifting and release system; In this utility model, specifically, the impact test device is used to impact the fragile cover 29 with the head cone 26 at a preset mass and a preset speed. In addition, the punching test device is also used to buffer and brake the head cone impact platform after the punching test is completed.

[0016] In this utility model, the punching test device includes a base plate, a guide frame assembly, a head cone impact platform, and a fragile cap mounting platform; The top of the base plate 1 is provided with a guide frame assembly and a fragile cover mounting platform; The guide frame assembly is equipped with a head cone impact platform; The fragile cover mounting platform is located directly below the head cone impact platform.

[0017] In practice, the base plate 1 is placed on the ground and fixed with anchor bolts; A guide frame assembly is installed on the top of base plate 1; The head cone impact platform is installed at the upper middle position of the guide frame assembly.

[0018] The top of the base plate 1 is located directly below the head cone impact platform, where the fragile cover mounting platform is installed; Furthermore, the base plate 1 is provided with threaded holes, and the guide frame assembly and the fragile cover mounting platform are fixed to the base plate 1 by screws.

[0019] It should be noted that the base plate is a steel plate with a length of 2m, a width of 2m, and a thickness of 30mm. Each of the four corners of the base plate has a through hole with a diameter of 24mm, through which the base plate is fixed to the ground using anchor bolts. Each side of the base plate has 12 threaded holes with a diameter of 12mm, through which the guide frame assembly is fixed to the base plate using screws. The middle of the base plate 1, near the guide frame, has 4 threaded holes with a diameter of 12mm, through which the fragile cover mounting platform is fixed to the base plate using screws. Each of the four corners of the base plate 1 has a threaded lifting hole with a diameter of 12mm.

[0020] In specific implementation, the guide frame assembly includes a left guide frame 2, a right guide frame 3, a left guide shaft 4, a right guide shaft 5, a left rubber buffer pad 6, a right rubber buffer pad 7, a left upper guide shaft support 8, a left lower guide shaft support 9, a right upper guide shaft support 10, a right lower guide shaft support 11, a left middle platform 12, a right middle platform 13, a left cover plate 14, a right cover plate 15, a left protective rod 16, a right protective rod 17, a front crossbeam 18, and a rear crossbeam 19. The left guide frame 2 and the right guide frame 3 are vertically distributed and spaced apart on the top of the base plate 1; At the center of the left guide frame 2 and the right guide frame 3, there are vertically distributed left guide shafts 4 and right guide shafts 5, respectively; The left guide shaft 4 and the right guide shaft 5 are used to connect to the left and right ends of the impact platform 20 in the head cone impact table; Furthermore, the upper front and rear sides of the left guide frame 2 and the right guide frame 3 are connected to the left and right ends of the front crossbeam 18 and the rear crossbeam 19, respectively. Furthermore, the lower parts of the left guide frame 2 and the right guide frame 3 are respectively provided with horizontally distributed left middle platform 12 and right middle platform 13; The top of the left guide frame 2 and the right guide frame 3 are respectively provided with a left cover plate 14 and a right cover plate 15; The top surfaces of the left cover plate 14 and the right cover plate 15 are respectively provided with the upper left guide shaft support 8 and the upper right guide shaft support 10; The bottom surfaces of the left middle platform 12 and the right middle platform 13 are respectively provided with a lower left guide shaft support 9 and a lower right guide shaft support 11; The upper and lower ends of the left guide shaft 4 are fixedly connected to the upper left guide shaft support 8 and the lower left guide shaft support 9, respectively. The upper and lower ends of the right guide shaft 5 are fixedly connected to the upper right guide shaft support 10 and the lower right guide shaft support 11, respectively. Furthermore, a left rubber buffer pad 6 and a right rubber buffer pad 7 are respectively placed on the top of the left middle platform 12 and the right middle platform 13. The left guide shaft 4 and the right guide shaft 5 pass vertically through the reserved middle circular hole on the left rubber buffer pad 6 and the reserved middle circular hole on the right rubber buffer pad 7, respectively.

[0021] Furthermore, longitudinally distributed left protective rods 16 and right protective rods 17 are respectively provided at the upper middle positions of the left guide frame 2 and the right guide frame 3. Before the test begins, the left protective bar 16 and the right protective bar 17 are located directly below the left and right ends of the impact platform 20 of the head cone impact table.

[0022] It should be noted that there are two 12mm diameter threaded holes in the upper middle position of the left guide frame 2 and the right guide frame 3. The protective rod is fixed to the guide frame by screws through these threaded holes. It should be noted that there are two threaded holes with a diameter of 12mm on the front and rear sides of the left guide frame 2 and the right guide frame 3, respectively. The front crossbeam 18 and the rear crossbeam 19 are fixed to the left guide frame 2 and the right guide frame 3 by screws through these threaded holes. The crossbeam is made of square tube with a cross-sectional size of 50mm×50mm and a thickness of 5mm, and a length of 2m.

[0023] It should be noted that the outer dimensions of the guide frame assembly are 2m long × 1.6m wide × 2.13m high; the guide frame is formed by welding rectangular steel pipes with a cross-sectional dimension of 50mm × 50mm and a thickness of 5mm; the left guide frame 2 and the right guide frame 3 each have 12 through holes with a diameter of 13mm at the contact position with the base plate 1, and the two guide frames are fixed to the base plate by screws through these through holes; the left guide frame 2 and the right guide frame 3 are respectively provided with a left middle platform 12 and a right middle platform 13, which are formed by welding steel plates in the middle position of the guide frame; It should be noted that the top of the left guide frame 2 and the right guide frame 3 are provided with three threaded holes with a diameter of 12mm. Screws are used to fix the left cover plate 14 and the right cover plate 15 to the two guide frames through these threaded holes. It should be noted that the left middle platform 12, the right middle platform 13, the left cover plate 14, and the right cover plate 15 are each provided with a through hole with a diameter of 51mm and four guide shaft support fixing threaded holes with a diameter of 8mm. The corresponding guide shaft supports are fixed to the bottom of the middle platform and the top of the cover plate by screws. It should be noted that the left guide shaft 4 and the right guide shaft 5 are optical shafts with a diameter of 50mm and a length of 2m. The guide shafts are fixed by two supports, one above and one below, and are in a vertical position after being fixed. It should be noted that two intermediate platforms, the left middle platform 12 and the right middle platform 13, are equipped with rubber buffer pads with a thickness of 150mm (left rubber buffer pad 6 and right rubber buffer pad 7). There is a circular hole with a diameter of 52mm in the middle of the two buffer pads, and the corresponding guide shaft passes through the circular hole in the middle of the rubber pad. It should be noted that the left protective bar 16 and the right protective bar 17 are made of rectangular steel pipe with a cross-sectional dimension of 50mm×50mm and a thickness of 5mm, and a length of 0.5m. In specific implementation, the head cone impact table includes an impact platform 20, a left linear bearing 21, a right linear bearing 22, a counterweight plate 23, a force sensor 24, a head cone tooling 25, and a head cone 26. The left and right ends of the impact platform 20 are respectively provided with a left linear bearing 21 and a right linear bearing 22; The left linear bearing 21 and the right linear bearing 22 are respectively used to vertically penetrate the left guide shaft 4 and the right guide shaft 5 in the guide frame assembly; A counterweight plate 23 is provided at the center of the top surface of the impact platform 20; The bottom center of the impact platform 20 is connected to the top of the head cone connecting column 25; The bottom of the head cone connecting column 25 is connected to the head cone 26.

[0024] Furthermore, a force sensor 24 is installed at the position between the impact platform 20 and the head cone connecting column 25; Force sensor 24 is used to measure the impact force borne by head cone 26 when it impacts fragile cover 29.

[0025] It should be noted that the external dimensions of the head cone impact table are 1.86m long × 0.36m wide × 0.72m high; the impact platform 20 is made of welded steel plate and weighs about 200kg; each side of the impact platform 20 has a circular hole with a diameter of 81mm, and around the circular hole are four threaded holes with a diameter of 8mm. Screws are used to fix two linear bearings to the impact platform 20 through these threaded holes, and the left and right guide shafts pass through the middle of the two linear bearings; It should be noted that there is a 20mm diameter threaded hole under the impact platform, through which the head cone connecting column 25 is fixed with screws; It should be noted that the impact platform 20 has four 12mm diameter threaded holes and one 24mm diameter threaded hole. Screws are used to fix the counterweight plate through these 12mm diameter threaded holes. Specifically, there are six counterweight plates, each weighing 50kg. Each counterweight plate has one 110mm diameter round hole and four 13mm diameter through holes. Screws are used to fix the counterweight plate to the impact platform through these 13mm diameter through holes. It should be noted that the force sensor 24 has a circular hole with a diameter of 26.5 mm in the middle; the head cone connecting column 25 has a through hole with a diameter of 26.5 mm in the middle. The force sensor is placed between the head cone connecting column and the impact platform 20. The head cone connecting column and the force sensor are fixed on the impact platform 20 by the shoulder screw. It should be noted that the head cone connecting post has 8 through holes with a diameter of 6.5 mm at the bottom. The head cone 26 is fixed to the head cone connecting post with screws through these through holes. The head cone 26 has 8 threaded holes with a diameter of 6 mm. The head cone 26 is fixed to the head cone connecting post 25 with screws through these threaded holes.

[0026] It should be noted that, for this utility model, a head cone impact platform is installed between the two (left guide shaft 4 and right guide shaft 5) in the guide frame assembly. The head cone impact platform can move up and down between the two intermediate platforms (left intermediate platform 12 and right intermediate platform 13) and the two cover plates (left cover plate 14 and right cover plate 15) of the two guide frames.

[0027] In specific implementation, the fragile cover mounting platform includes a mounting frame 27, a mounting plate 28, and a fragile cover 29; The bottom of the mounting frame 27 is fixedly connected to the top of the base plate 1; A mounting plate 28 is provided at the top center of the mounting frame 27; A central through hole is provided at the center of the mounting plate 28; A fragile cover 29 is provided at the center through hole of the mounting plate 28.

[0028] It should be noted that, for this utility model, the outer dimensions of the fragile cover mounting platform are 1.4m long × 0.75m wide × 0.6m high; the mounting frame 27 is formed by welding a rectangular steel tube with a cross-sectional dimension of 50mm × 50mm and a thickness of 5mm; there are two through holes with a diameter of 13mm on each side of the contact position between the mounting frame 27 and the base plate 1, and screws are used to fix the mounting frame 27 to the base plate 1 through these through holes; It should be noted that there are 8 threaded holes with a diameter of 12mm in the middle of the upper part of the mounting frame 27. The mounting plate 28 is fixed to the mounting frame 27 by screws through these threaded holes. It should be noted that there are 8 through holes with a diameter of 13mm around the outer perimeter of the mounting plate 28, and screws are used to fix the mounting plate 28 to the mounting frame 27 through these through holes; there is a circular hole with a diameter of 464mm (i.e., a central through hole) in the middle of the mounting plate 28, and there are 12 threaded holes with a diameter of 6mm around it, and screws are used to fix the fragile cover 29 to the mounting plate 28 through these threaded holes. It should be noted that the fragile cover 29 has 12 6.5mm through holes, and screws are used to fix the fragile cover 29 to the mounting plate 28 through these through holes.

[0029] In this utility model, specifically, the punching test system of this utility model also includes a lifting and release system; The lifting and release system includes a lifting ring 30, a shackle 31, a release device 32, a wire rope, and a crane; The lifting ring 30 is located on top of the impact platform 20 in the head cone impact table; The lifting ring 30 is connected to one end of the release device 32 via a shackle 31; The other end of the unhooking device 32 is connected to the traction end of the trolley via a steel wire rope.

[0030] Furthermore, the counterweight 23 in the head cone impact table has a central through hole at a position corresponding to the lifting ring 30, for the lower screw of the lifting ring to pass through.

[0031] It should be noted that the lifting ring is an M24 lifting ring, and the lifting ring 30 is installed on the impact platform 20 through the M24 threaded hole in the middle position of the impact platform 20; the U-shaped end of the shackle 31 is connected to the lifting ring, and the cylindrical end is connected to the unhooking device 32; the upper end of the unhooking device 32 is connected to the traction end of the trolley (e.g., a mobile vehicle) through a wire rope.

[0032] It should be noted that the unhooking device 32 is a common device in the current hoisting field. It can stably connect to or release the cylindrical end of the shackle 31, and will not be described in detail here.

[0033] In this utility model, specifically, the punching test system of this utility model also includes an impact force testing system; An impact testing system is used to measure and record the impact force borne by the head cone 26 when it impacts the fragile cover 29. In practice, the impact force testing system includes a force sensor 24, test cables, a data acquisition and analysis instrument, and a test computer. Force sensor 24 is used to measure the impact force signal that the head cone 26 experiences when it impacts the fragile cover 29, and then sends it to the data acquisition and analysis instrument through a test cable; The data acquisition and analysis instrument is used to amplify, convert, and store the impact force signal sent by the sensor into an analyzable data format, and then send it to the test computer through a test cable; A test computer is used to receive and store the impact force signals sent by the data acquisition and analysis instrument, and to perform data analysis.

[0034] It should be noted that the technical principle and working method of acquiring and analyzing the impact force signal collected by the force sensor through a test computer and data acquisition and analysis instrument is a mature and conventional analysis technique that has been widely promoted and will not be elaborated here.

[0035] In this utility model, specifically, the punching test system of this utility model also includes a high-speed photography system; A high-speed photography system is positioned directly in front of the cap-impact testing device. It is used to determine the relationship between the drop height and speed of the head cone before the formal test, and to measure the speed at which the head cone impacts the fragile cap during the formal test.

[0036] In practice, the high-speed photography system includes a high-speed camera, test cables, and a test computer. A high-speed camera is positioned directly in front of the punching test device; A high-speed camera was used to capture video of the impact of the head cone 26 on the fragile cover 29 and transmit the video to the test computer via a test cable. A test computer is used to measure the speed at which the head cone impacts the fragile cover during formal testing, based on video transmitted from a high-speed camera. In addition, a test computer is used to pre-capture video of the head cone falling to a preset height using a high-speed camera before the formal test, and to determine the relationship between the head cone's falling height and speed based on the video.

[0037] It should be noted that the technical principle and working method of the test computer to determine the relationship between the drop height and speed of the head cone through a high-speed camera, as well as to measure the speed of the head cone when it impacts the fragile cover, is a mature and conventional speed measurement technology that has been widely adopted and will not be elaborated on here.

[0038] In summary, the impact test system of this utility model uses free fall to cause the cone to impact the fragile cap at a required speed. High-speed photography is used to determine the speed at which the cone impacts the fragile cap and the corresponding relationship between the cone's falling height and speed. The cone is connected to an impact table, on which a counterweight can be installed to simulate the impact of the cone on the fragile cap with a certain mass. A force sensor installed behind the cone fixture acquires the dynamic impact force borne by the cone. Furthermore, the falling height of the cone impact table is adjusted by a crane in the factory, and the cone impact table is released by a release device.

[0039] To better understand the technical solution of this utility model, the working process of this utility model is described below.

[0040] Based on the simulated head cone impact fragile cap punching test system provided by this utility model, the punching test method of this utility model includes the following steps: Step 1: Set up the punching test system, including punching device, high-speed photography system, impact force testing system, lifting and release system. Install a 300kg counterweight on the impact platform. In this state, the total weight of the head cone impact platform is about 500kg. Step 2: Debug the punching test system and confirm that the punching test device, high-speed photography system, impact force testing system and lifting and release system are functioning normally; Step 3: Install the fragile cap and the head cone for the formal test onto the mounting plate and the head cone connecting post, respectively; Step 4: Install the lifting ring onto the impact platform, and then connect the lifting ring, shackle, release device, and crane in sequence. The release device is equipped with a safety pin. Step 5: Raise the head cone impact platform to the predetermined drop height position, with the top of the head cone 380mm away from the impact position of the fragile cover (corresponding to a speed of 2.7m / s). Step Six: Remove the protective rod on the guide frame assembly and remove the safety pin on the unhooking device; Step 7: Activate the high-speed photography system and impact testing system, pull the unhooking device to release the head cone, and complete the impact test; Step 8: Inspect the shape of the cracks in the fragile cap and the appearance of the cone-shaped structure; Step 9: Determine the impact velocity through high-speed photography, and determine the impact force borne by the head cone based on the acquired impact force data; Step 10: Remove the head cone and perform flaw detection on it.

[0041] Compared with the prior art, the impact test system for simulating the impact of a cone on a fragile cap provided by this utility model has the following beneficial effects: 1. This application provides a cap-punching test system that can realistically simulate the impact of a head cone on a fragile cap. Compared with the prior art, this test system simulates the impact of a head cone on a fragile cap with a certain mass and a realistic speed, so as to achieve a more realistic test verification of the cracking morphology of the fragile cap and the structural damage of the head cone. It can obtain the speed of the head cone when impacting the fragile cap and the dynamic impact force borne by the head cone during the cap-punching process.

[0042] 2. Compared with static ignition and impingement tests using real rockets and launch tanks, this test system has advantages such as reasonable structure, convenient use, low cost, and rapid repeatability.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cap-impact test system simulating a head cone impact on a fragile cap, characterized in that, Includes a punching test device; A punching test device is used to impact a head cone (26) with a preset mass and a preset speed to a fragile cap (29). The cap-punching test apparatus includes a base plate, a guide frame assembly, a head cone impact table, and a fragile cap mounting table; The top of the base plate (1) is provided with a guide frame assembly and a fragile cover mounting platform; The guide frame assembly is equipped with a head cone impact platform; The fragile cover mounting platform is located directly below the head cone impact platform.

2. The impact test system for simulating a head cone impact on a fragile cap as described in claim 1, characterized in that, The guide frame assembly includes a left guide frame (2), a right guide frame (3), a left guide shaft (4), a right guide shaft (5), a left rubber buffer pad (6), a right rubber buffer pad (7), a left upper guide shaft support (8), a left lower guide shaft support (9), a right upper guide shaft support (10), a right lower guide shaft support (11), a left middle platform (12), a right middle platform (13), a left cover plate (14), a right cover plate (15), a left protective rod (16), a right protective rod (17), a front crossbeam (18), and a rear crossbeam (19). The left guide frame (2) and the right guide frame (3) are vertically distributed and spaced apart on the top of the base plate (1); At the center of the left guide frame (2) and the right guide frame (3), there are vertically distributed left guide shafts (4) and right guide shafts (5), respectively. The left guide shaft (4) and the right guide shaft (5) are used to connect to the left and right ends of the impact platform (20) in the head cone impact table.

3. The impact test system for simulating a head cone impact on a fragile cap as described in claim 2, characterized in that, The upper front and rear sides of the left guide frame (2) and the right guide frame (3) are connected to the left and right ends of the front crossbeam (18) and the rear crossbeam (19), respectively. The lower parts of the left guide frame (2) and the right guide frame (3) are respectively provided with horizontally distributed left middle platform (12) and right middle platform (13). The top of the left guide frame (2) and the right guide frame (3) are respectively provided with a left cover plate (14) and a right cover plate (15). The top surfaces of the left cover plate (14) and the right cover plate (15) are respectively provided with a left upper guide shaft support (8) and a right upper guide shaft support (10). The bottom surfaces of the left middle platform (12) and the right middle platform (13) are respectively provided with a left lower guide shaft support (9) and a right lower guide shaft support (11). The upper and lower ends of the left guide shaft (4) are fixedly connected to the upper left guide shaft support (8) and the lower left guide shaft support (9), respectively. The upper and lower ends of the right guide shaft (5) are fixedly connected to the upper right guide shaft support (10) and the lower right guide shaft support (11), respectively.

4. The impact test system for simulating a head cone impact on a fragile cap as described in claim 3, characterized in that, On the top of the left middle platform (12) and the right middle platform (13), a left rubber buffer pad (6) and a right rubber buffer pad (7) are respectively placed. The left guide shaft (4) and the right guide shaft (5) pass vertically through the reserved middle hole on the left rubber buffer pad (6) and the reserved middle hole on the right rubber buffer pad (7), respectively.

5. The impact test system for simulating a head cone impact on a fragile cap as described in claim 2, characterized in that, The left guide frame (2) and the right guide frame (3) are respectively provided with longitudinally distributed left protective rods (16) and right protective rods (17). Before the test begins, the left protective bar (16) and the right protective bar (17) are located directly below the left and right ends of the impact platform (20) of the head cone impact table.

6. The impact test system for simulating a head cone impact on a fragile cap as described in claim 1, characterized in that, The head cone impact table includes an impact platform (20), a left linear bearing (21), a right linear bearing (22), a counterweight plate (23), a force sensor (24), a head cone connecting column (25), and a head cone (26). The left and right ends of the impact platform (20) are respectively provided with a left linear bearing (21) and a right linear bearing (22). The left linear bearing (21) and the right linear bearing (22) are used to vertically pass through the left guide shaft (4) and the right guide shaft (5) in the guide frame assembly, respectively. A counterweight plate (23) is provided in the middle of the top surface of the impact platform (20). The bottom center of the impact platform (20) is connected to the top of the head cone connecting column (25); The bottom of the head cone connecting post (25) is connected to the head cone (26).

7. The impact test system for simulating a head cone impact on a fragile cap as described in claim 6, characterized in that, A force sensor (24) is installed at the position between the impact platform (20) and the head cone connecting column (25). Force sensor (24) is used to measure the impact force borne by head cone (26) when head cone (26) impacts fragile cover (29).

8. The impact test system for simulating a head cone impact on a fragile cap as described in claim 1, characterized in that, The fragile cover mounting platform includes a mounting frame (27), a mounting plate (28), and a fragile cover (29). The bottom of the mounting frame (27) is fixedly connected to the top of the base plate (1); A mounting plate (28) is provided at the top center of the mounting frame (27). A central through hole is provided at the center of the mounting plate (28); A fragile cover (29) is provided at the center through hole of the mounting plate (28).

9. The impact test system for simulating head cone impact on a fragile cap as described in any one of claims 1 to 8, characterized in that, It also includes a lifting and release system; The lifting and release system includes a lifting ring (30), a shackle (31), a release device (32), a wire rope, and a crane; The lifting ring (30) is located on top of the impact platform (20) in the head cone impact table; The lifting ring (30) is connected to one end of the release device (32) via a shackle (31); The other end of the unhooking device (32) is connected to the traction end of the trolley via a wire rope.

Images