Gradient functional composite protection structure with high wave attenuation characteristics

Abstract

The application discloses a gradient functional composite bulletproof structure with wave attenuation characteristics, and relates to the field of engineering structure protection.The structure comprises two fixed side seats and a supporting frame plate arranged between the two fixed side seats.The two ends of the supporting frame plate are connected and fixed with the fixed side seats through clamping mechanisms.The lower end of the fixed side seat is in sliding contact with a mounting base.The mounting base and the fixed side seat are connected through a sliding mechanism.A buffer mechanism is further arranged between the tail of the mounting base and the fixed side seat.The application is designed according to the existing needs, and a plurality of composite plates arranged at intervals are constructed in the bulletproof structure.The wave impedance of each layer of the composite plates is different, so that the bullet can be attenuated in multiple stages when the bullet penetrates, and the problem of explosion does not occur when the bullet is initially penetrated.In addition, the application further provides a buffer structure, which can absorb the impact force of the bullet from another angle, so that the bulletproof effect is further improved.

Description

Technical Field

[0001] This invention relates to the field of engineering structure protection, specifically a gradient functional composite ballistic structure with wave attenuation characteristics. Background Technology

[0002] With the development of weaponry, concrete has been widely and extensively used in both civilian and military construction. However, its application suffers from drawbacks such as high weight, high brittleness (low tensile-compression ratio), and susceptibility to cracking. Especially when subjected to projectile impact, concrete, as a target, often fractures and fragments under strong forces due to its brittleness, causing secondary damage to personnel and equipment. Therefore, a more efficient protective structure is needed. This invention discloses a wave-attenuation gradient functional composite structure that can improve the brittleness of concrete targets and reduce impact loads. Research shows that using a multi-layer composite structure design can significantly improve the structure's penetration resistance. Compared to a single concrete protective layer, while multi-layer concrete protective structures offer stronger overall protection and possess various superior properties, under dynamic impact loads, the significant differences in composition and performance between adjacent layers can easily lead to relative displacement or delamination, resulting in new cracks or fissures within the structure. This ultimately causes a significant reduction in the overall protective performance of the structure, sometimes even falling below that of a single concrete protective layer under the same conditions in certain special circumstances. Therefore, in order to further improve the protective performance of concrete structures, it is necessary to improve and enhance the performance matching between adjacent structural layers in multi-layer composite protective structures.

[0003] Based on this, a gradient functional composite ballistic structure with wave attenuation characteristics is now provided, which can eliminate the drawbacks of existing devices. Combined with experimental and theoretical derivation, it can improve ballistic performance by 30%. Summary of the Invention

[0004] The purpose of this invention is to provide a gradient functional composite ballistic structure with wave attenuation characteristics to solve the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A gradient-functional composite ballistic structure with wave attenuation characteristics includes two fixed side seats and a support frame plate disposed between the two fixed side seats. The two ends of the support frame plate are connected and fixed to the fixed side seats by snap-fit ​​mechanisms. The lower end of the fixed side seat is in sliding contact with a mounting base. The mounting base and the fixed side seats are connected by a sliding mechanism. A buffer mechanism is also provided between the tail of the mounting base and the fixed side seats. The end of the fixed side seat is provided with a sloped structure for guiding the bullet. The upper end of the support frame plate is provided with a mounting notch, and a ballistic structure is provided at the mounting notch.

[0007] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In one alternative: the ballistic structure includes at least a plurality of mounting vertical slots disposed on the side of the mounting notch, and the mounting vertical slots are provided with a first composite plate, a second composite plate and a third composite plate in sequence from front to back. The first composite plate is a foamed aluminum plate, the second composite plate is a high-strength fiber concrete plate, and the third composite plate is made of polyurea board. The surface of the third composite plate is provided with a foam layer.

[0009] In one alternative: the back of the support frame plate is provided with an arched back that protrudes towards the front, and the surface of the arched back is distributed with a plurality of reinforcing ribs.

[0010] In one alternative: the upper end of the support frame is provided with a pressure plate that presses against the upper ends of the first composite plate, the second composite plate and the third composite plate.

[0011] In one alternative: the inclined structure includes a guide inclined surface disposed at the end of the fixed side seat, the guide inclined surface being disposed at an acute angle to the surface of the ballistic structure.

[0012] In one alternative: the buffer mechanism includes a tail plate disposed at the rear of the mounting base, a guide rod slidably disposed in a guide hole on the tail plate, the guide rod being connected to the fixed side seat by a buffer spring, and a mounting groove corresponding to the buffer spring being provided at the upper end of the mounting base.

[0013] In one alternative: the sliding mechanism includes a fixed block disposed on the upper end of the mounting base, a side sliding groove provided on the side of the fixed block, and a side slider that cooperates with the side sliding groove on the outer side of the lower end of the fixed side seat. The cross-section of the side slider and the side sliding groove can be rectangular or semi-circular. The side of the side slider has multiple spherical cavities distributed on its side, and a ball is fitted in each spherical cavity. The multiple balls constitute a rolling surface.

[0014] In one alternative embodiment: the snap-fit ​​mechanism includes a mounting slot provided on the side of the fixed side seat, and mounting strips that cooperate with the mounting slots are provided at both ends of the support frame plate. The snap-fit ​​fixing between the support frame plate and the fixed side seat is completed by the cooperation of the mounting slots and mounting strips.

[0015] In one alternative: two mounting bases are connected by a locking mechanism, the locking mechanism including a traction rod connected to the mounting base, an adjusting bolt at the end of the traction rod, a bolt adjusting block between the two adjusting bolts, and a threaded connection between the outer end of the bolt adjusting block and the adjusting bolt.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention addresses existing needs by constructing a multi-layered composite plate in the ballistic structure. Each layer of the composite plate has a different wave impedance, which allows for multi-stage attenuation when the bullet penetrates. Furthermore, the use of foamed aluminum plate during initial penetration prevents the bullet from bursting. In addition, this application also incorporates a buffer structure, which can absorb the impact force of the bullet from another angle, thereby further improving the ballistic resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure on the back of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the present invention after disassembly and assembly.

[0021] Figure 4 This is a schematic diagram of the locking mechanism of the present invention.

[0022] Figure reference numerals: Mounting base 11, mounting groove 12, buffer spring 13, tail plate 14, side sliding groove 15, side sliding block 16, support frame plate 17, mounting notch 18, guide slope 19, fixed side seat 20, mounting slot 21, mounting strip 22, first composite plate 23, arched back 24, reinforcing rib 25, guide slide rod 26, third composite plate 27, second composite plate 28, support bottom surface 29, elastic layer 30, traction rod 31, bolt adjusting block 32, adjusting bolt 33. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] In one embodiment, such as Figure 1 - Figure 4 As shown, a gradient functional composite ballistic structure with wave attenuation characteristics includes two fixed side seats 20 and a support frame plate 17 disposed between the two fixed side seats 20. The two ends of the support frame plate 17 are connected and fixed to the fixed side seats 20 by a snap-fit ​​mechanism. The lower end of the fixed side seat 20 is in sliding contact with the mounting base 11. The mounting base 11 and the fixed side seat 20 are connected by a sliding mechanism. A buffer mechanism is also provided between the tail of the mounting base 11 and the fixed side seat 20. The buffer mechanism allows the fixed side seat 20 to be displaced as a whole, thereby absorbing the impact force. The end of the fixed side seat 20 is provided with a sloping structure for guiding the bullet. The upper end of the support frame plate 17 is provided with a mounting notch 18. A ballistic structure is provided at the mounting notch 18 to absorb the energy of the bullet.

[0025] The ballistic structure includes at least a plurality of mounting vertical slots disposed on the side of the mounting notch 18. From front to back, the mounting vertical slots are provided with a first composite plate 23, a second composite plate 28, and a third composite plate 27. The first composite plate 23 is a foamed aluminum board, utilizing its high strength and buffering capacity to absorb the initial impact of the bullet. After the shock wave passes through plate (ρ0CO)1, its incident stress wave is divided into a reflected stress wave and a transmitted stress wave. Subsequently, the bullet impacts the surface of the second composite plate 28, which is a high-strength fiber-reinforced concrete plate (ρ0CO)2. The stress wave reflected from the interface has the opposite sign to the incident stress wave. At this point, relative to the amplitude of the incident stress wave, the transmitted stress wave... The amplitude of the transmitted stress wave is relatively small, thus weakening the stress wave and further absorbing energy from the bullet. The second composite plate 28 is not too thick to save material. The third composite plate 27 is made of polyurea board (ρ0CO)3, and a foam layer is provided on its surface. When the bullet strikes the surface of the third composite plate 27, the stress wave reflected from the interface has the opposite sign to the incident stress wave. Therefore, the amplitude of the transmitted stress wave is smaller than that of the incident stress wave, weakening the stress wave. The foam layer can also help fix the bullet, allowing the penetration force to be measured based on the depth of the bullet's penetration into the third composite plate 27. The propagation of the stress wave thus undergoes a process from "hard material" to "soft material." Improving the protective performance of the target structure material, causing the stress wave to propagate through this process, is an effective improvement measure. This structure is based on this theory.

[0026] The first composite plate 23, the second composite plate 28 and the third composite plate 27 in this application are detachable, which facilitates later replacement. Furthermore, the multi-layered structure helps to gradually reduce the impact force of the bullet, which is convenient for testing the bullet.

[0027] The bottom of the installation notch 18 is a support bottom surface 29, which gradually increases in height from the outside to the inside. This makes it easier to remove the filler material later. In addition, the lower end of the installation slot 21 does not contact the support bottom surface 29, reducing cleaning dead corners.

[0028] An elastic layer 30 is provided on the back of the mounting notch 18. Here, the elastic layer 30 can be a rubber layer or a sponge layer, which can cushion the third composite board 27.

[0029] The back of the support frame plate 17 is provided with an arched back 24 that protrudes towards the front. The arched structure of the arched back 24 can effectively improve the overall mechanical properties of the support frame plate 17. Multiple reinforcing ribs 25 are distributed on the surface of the arched back 24, and the reinforcing ribs 25 further improve the structural strength of the arched back 24.

[0030] To prevent the filler from overflowing, the upper end of the support frame plate 17 is provided with a pressure plate that presses the upper ends of the first composite plate 23, the second composite plate 28 and the third composite plate 27 tightly. The pressure plate limits the filler and prevents the filler from being shaken out during use.

[0031] The inclined structure includes a guide inclined surface 19 disposed at the end of the fixed side seat 20. The guide inclined surface 19 is set at an acute angle to the surface of the ballistic structure, and the acute angle is not less than 60 degrees. In this way, the bullet can be guided when it does not hit the ballistic structure. The surface of the guide inclined surface 19 is covered with a steel shell to guide the bullet.

[0032] The buffer mechanism includes a tail plate 14 disposed at the rear of the mounting base 11. A guide rod 26 is slidably disposed in a guide hole on the tail plate 14. The guide rod 26 is connected to the fixed side seat 20 by a buffer spring 13. The upper end of the mounting base 11 is provided with a mounting groove 12 corresponding to the buffer spring 13. When the fixed side seat 20 slides along the surface of the mounting base 11, the buffer spring 13 can be compressed, thereby absorbing the impact force received by the fixed side seat 20 and completing the absorption of the impact force. The buffer spring 13 can be a damping spring for better absorption of the impact force.

[0033] The sliding mechanism includes a fixed block disposed on the upper end of the mounting base 11. A side sliding groove 15 is provided on the side of the fixed block. A side slider 16 that cooperates with the side sliding groove 15 is provided on the outer side of the lower end of the fixed side seat 20. The cross-section of the side slider 16 and the side sliding groove 15 can be rectangular or semi-circular. In order to enable the side slider 16 and the side sliding groove 15 to slide smoothly, the side of the side slider 16 is provided with multiple spherical cavities. A ball is fitted in each spherical cavity. The multiple balls form a rolling surface, so that rolling friction replaces sliding friction, reducing friction and enabling the fixed side seat 20 to slide smoothly.

[0034] The snap-fit ​​mechanism includes a mounting slot 21 provided on the side of the fixed side seat 20, and mounting strips 22 at both ends of the support frame plate 17 that cooperate with the mounting slot 21. By cooperating with the mounting slot 21 and the mounting strips 22, the snap-fit ​​fixing between the support frame plate 17 and the fixed side seat 20 is completed. This snap-fit ​​method facilitates the quick replacement of the support frame plate 17. The mounting slot 21 and the mounting strips 22 have rectangular or circular cross sections.

[0035] Two mounting bases 11 are connected by a locking mechanism. The locking mechanism includes a traction rod 31 connected to the mounting base 11. An adjusting bolt 33 is provided at the end of the traction rod 31. A bolt adjusting block 32 is provided between the two adjusting bolts 33. The outer end of the bolt adjusting block 32 is threadedly connected to the adjusting bolt 33. By rotating the bolt adjusting block 32, the two traction rods 31 are tightened, thereby limiting the distance between the two mounting bases 11.

[0036] The above embodiments disclose a gradient functional composite ballistic structure with wave attenuation characteristics. In actual use, when a bullet hits the ballistic structure, the high strength and buffering capacity of the aluminum foam board itself absorbs the initial impact. After the shock wave passes through board (ρ0CO)1, its incident stress wave is divided into reflected stress wave and transmitted stress wave. Subsequently, the bullet impacts the surface of the second composite board 28, which is a high-strength fiber reinforced concrete board (ρ0CO)2. The stress wave reflected from the interface has the opposite sign to the incident stress wave. At this time, the amplitude of the transmitted stress wave is smaller than that of the incident stress wave, and the stress wave is weakened. To further absorb energy from the bullet, the second composite plate 28 is not made too thick to save materials. The third composite plate 27 is made of polyurea board (ρ0CO)3, and a foam layer is provided on the surface of the third composite plate 27. When the bullet strikes the surface of the third composite plate 27, the stress wave reflected from the interface has the opposite sign to the incident stress wave. At this point, the amplitude of the transmitted stress wave is smaller than that of the incident stress wave, thus weakening the stress wave. The foam layer can also help fix the bullet, allowing the penetration force to be measured based on the depth of the bullet's penetration into the third composite plate 27. The propagation of the stress wave thus undergoes a process from "hard material" to "soft material." Improving the protective performance of the target structure material, causing the stress wave propagation to undergo this process from "hard material" to "soft material," is an effective improvement measure. This structure is based on this theory.

[0037] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A gradient functional composite ballistic structure with wave attenuation characteristics, comprising two fixed side seats (20) and a support frame plate (17) disposed between the two fixed side seats (20), wherein the two ends of the support frame plate (17) are connected and fixed to the fixed side seats (20) by a snap-fit ​​mechanism, characterized in that, The lower end of the fixed side seat (20) is in sliding contact with the mounting base (11). The mounting base (11) and the fixed side seat (20) are connected by a sliding mechanism. A buffer mechanism is also provided between the tail of the mounting base (11) and the fixed side seat (20). The end of the fixed side seat (20) is provided with a sloping structure for guiding the bullet. The upper end of the support frame plate (17) is provided with an installation notch (18). An anti-ballistic structure is provided at the position of the installation notch (18). The anti-ballistic structure includes at least a plurality of installation vertical grooves provided on the side of the installation notch (18). The installation vertical grooves are provided with a first composite plate (23), a second composite plate (28) and a third composite plate (27) from front to back. The first composite plate (23) is a foamed aluminum plate, the second composite plate (28) is a high-strength fiber concrete plate, and the third composite plate (27) is made of polyurea board. A foam layer is provided on the surface of the third composite plate (27). The back of the support frame plate (17) is provided with an arched shape that protrudes towards the front. The back (24) has multiple reinforcing ribs (25) distributed on its arched back (24). The upper end of the support frame plate (17) is provided with a pressure plate that presses against the upper ends of the first composite plate (23), the second composite plate (28), and the third composite plate (27). The buffer mechanism includes a tail plate (14) provided at the tail of the mounting base (11). A guide rod (26) is slidably provided in the guide hole on the tail plate (14). The guide rod (26) communicates with the fixed side seat (20). The mounting base (11) is connected by a buffer spring (13), and the upper end of the mounting base (11) is provided with a mounting groove (12) corresponding to the buffer spring (13). The snap-fit ​​mechanism includes a mounting groove (21) provided on the side of the fixed side seat (20). The two ends of the support frame plate (17) are provided with mounting strips (22) that cooperate with the mounting groove (21). By cooperating with the mounting groove (21) and the mounting strips (22), the snap-fit ​​fixation between the support frame plate (17) and the fixed side seat (20) is completed.

2. The gradient functional composite ballistic structure with wave attenuation characteristics according to claim 1, characterized in that, The inclined structure includes a guide inclined surface (19) provided at the end of the fixed side seat (20), and the guide inclined surface (19) is set at an acute angle to the surface of the ballistic structure.

3. The gradient functional composite ballistic structure with wave attenuation characteristics according to claim 1, characterized in that, The sliding mechanism includes a fixed block set on the upper end of the mounting base (11), and a side slide groove (15) is provided on the side of the fixed block. A side slider (16) that cooperates with the side slide groove (15) is provided on the lower outer side of the fixed side seat (20). The cross-section of the side slider (16) and the side slide groove (15) is rectangular or semi-circular. The side of the side slider (16) has multiple spherical cavities distributed on its side, and a ball is fitted in each spherical cavity. The multiple balls form a rolling surface.

4. The gradient functional composite ballistic structure with wave attenuation characteristics according to claim 1, characterized in that, Two mounting bases (11) are connected by a locking mechanism. The locking mechanism includes a traction rod (31) connected to the mounting base (11). An adjusting bolt (33) is provided at the end of the traction rod (31). A bolt adjusting block (32) is provided between the two adjusting bolts (33). The outer end of the bolt adjusting block (32) is threadedly connected to the adjusting bolt (33).

Images