CN-117307648-B - High-energy-absorption recoverable buffer structure suitable for penetration ammunition bullet leading buffer

CN117307648BCN 117307648 BCN117307648 BCN 117307648BCN-117307648-B

Abstract

The invention discloses a high-energy-absorption recoverable buffer structure suitable for the bullet guiding buffer of an penetration ammunition, which is of a cell array structure, wherein a first symmetrical bending cross double-curved beam structure is arranged at the lower end of an upper supporting plate of the cell structure, the first symmetrical bending cross double-curved beam structure is connected with the upper supporting plate through four first supporting columns, a second symmetrical bending cross double-curved beam structure is arranged at the upper end of a lower supporting plate, the second symmetrical bending cross double-curved beam structure is connected with the lower supporting plate through four second supporting columns, the first symmetrical bending cross double-curved beam structure is connected with the second symmetrical bending cross double-curved beam structure through four third supporting columns, each two third supporting columns divide a single curved beam into four equal parts, and four first supporting columns and four second supporting positions correspond to each other. The invention has high energy absorption and maintains certain restorability.

Inventors

LIU PENG
YANG BENQIANG
ZHANG AN
LI CHANGSHENG

Assignees

南京理工大学

Dates

Publication Date: 20260505
Application Date: 20231109

Claims (5)

1. The high energy absorption recoverable buffer structure suitable for the penetration ammunition bullet guiding buffer is a cell array structure comprising a plurality of cell structures, and is characterized in that the cell structures comprise an upper supporting plate, a lower supporting plate, a first symmetrical bending crisscross hyperbolic beam structure, a first supporting column, a second symmetrical bending crisscross hyperbolic beam structure, a second supporting column and a third supporting column; The upper support plate is provided with a second symmetrical bending cross hyperbolic beam structure at the upper end, the second symmetrical bending cross hyperbolic beam structure bends towards the lower support plate, the second symmetrical bending cross hyperbolic beam structure is connected with the lower support plate through four second support columns, the second symmetrical bending cross hyperbolic beam structure is connected with the four corners of the lower support plate, the first symmetrical bending cross hyperbolic beam structure is connected with the second support column through four third support columns, each two third support columns divide a single bent beam into four equal parts, the four first support columns correspond to the four second support columns in position, the first support columns are in contact with the second support columns at corresponding positions during compression to form a second steady-state structure, the bent beam structure is only elastically deformed during compression of the upper support column and the lower support column, the second support columns are connected with the four second support columns through four second support columns, the first symmetrical bending cross hyperbolic beam structure is connected with the second symmetrical bending cross hyperbolic beam structure through four third support columns, each two third support columns divide a single bent beam into four equal parts, the four first support columns correspond to the four second support columns in position, the first support columns are in contact with the second support columns at corresponding positions during compression, the second steady-state structure is formed during compression, the load-carrying capacity is maintained after the second steady-state structure is restored to a certain compression capacity, and the load is restored to a steady-state structure after the load is restored.
2. The high energy-absorbing recoverable buffer structure suitable for use in the firing of penetration ammunition according to claim 1, wherein the lower support plate of the upper unit cell structure is a multi-layered cell array structure as the upper support plate of the lower buffer unit cell structure.
3. The high energy-absorbing recoverable buffer structure suitable for use in the transmission of penetration ammunition as claimed in claim 1, wherein a TC4 titanium alloy material is used.
4. The high energy recoverable buffer structure for use in the buffering of the firing of penetration ammunition according to claim 1, wherein the high energy recoverable buffer structure is mounted between the projectile body and the fuze.
5. The high energy-absorbing recoverable buffer structure suitable for use in penetration ammunition primer buffering according to claim 1, wherein the high energy-absorbing recoverable buffer structure is manufactured by a 3D printing process and is manufactured by a substrate tilting method so as to reduce an included angle between a bending beam and a laser selective area in a horizontal direction.

Description

High-energy-absorption recoverable buffer structure suitable for penetration ammunition bullet leading buffer Technical Field The invention belongs to the field of penetration ammunition primer buffering, and particularly relates to a high-energy-absorption recoverable buffering structure suitable for penetration ammunition primer buffering. Background With the development of informatization and intelligence, the modern battlefield battle environment is complex and changeable. The upgrade of the defense means makes the penetration environment experienced by the penetration ammunition more complex. The development of intelligent ammunition requires penetration fuses to have multi-target self-adaptive identification and striking capability, different target information can be distinguished, and accurate detonation is realized according to setting information. When the high-strength thick target is hit, the fuze experiences long-time high overload, and when the multi-layer target is hit, the fuze experiences short intervals and multiple strong impacts. Thus, impact resistance is a bottleneck limiting the development of the penetration fuse, and springing buffering is an important method for reducing overload of the fuse. In modern war, as the protective thickness of underground work increases from 6m to 10m, the protective strength increases from C40 to C100, and the penetration speed of a warhead also exceeds 1500m/s. Aiming at the phenomenon of high impact overload of the fuse caused by penetration of multiple materials, multiple layers, high hardness and ultra-high sound velocity, the existing fuse buffer protection technology still has the problem of insufficient overload resistance. Materials commonly used for spring cushioning at this stage are nonmetallic elastic materials typified by rubber and polytetrafluoroethylene, and foamed metals. Elastic materials have certain advantages in deformation recovery, but cannot keep high energy absorption under long-time high overload, and cannot effectively protect fuses and extremely easily cause fuse failure when aiming at the ultra-high-speed penetration of a single-layer thick target. When the foam metal is used for penetrating the multi-layer target plate, the foam metal is compacted in the process of penetrating the first-layer target plate and cannot rebound, when the second-layer target plate is penetrated, a gap is formed between the fuze and the shell, and a very high acceleration peak value is generated by rigid contact between the compacted foam metal and the fuze, so that the fuze structure is damaged, the projectile is initiated incompletely, and the maximum damage efficiency cannot be realized. Therefore, there is a need to design a new energy absorbing and buffering material structure that combines the advantages of the two materials, and that has high energy absorption and maintains a certain restorability. Disclosure of Invention The invention aims to provide a high-energy-absorption recoverable buffer structure suitable for the impact absorption of penetration ammunition, which has high energy absorption and maintains certain recoverability. The technical solution for realizing the purpose of the invention is as follows: the high energy absorption recoverable buffer structure suitable for the penetration ammunition bullet guiding buffer is a cell array structure comprising a plurality of cell structures, wherein each cell structure comprises an upper supporting plate, a lower supporting plate, a first symmetrical bending crisscross hyperbolic beam structure, a first supporting column, a second symmetrical bending crisscross hyperbolic beam structure, a second supporting column and a third supporting column; The upper support plate is provided with a second symmetrical bending crossed double-curved beam structure at the upper end, the second symmetrical bending crossed double-curved beam structure is bent towards the lower support plate, the second symmetrical bending crossed double-curved beam structure is connected with the lower support plate through four second support columns, the second symmetrical bending crossed double-curved beam structure is connected to the four corners of the lower support plate, the first symmetrical bending crossed double-curved beam structure is connected with the second symmetrical bending crossed double-curved beam structure through four third support columns, each two third support columns divide a single curved beam into four equal parts, the four first support columns correspond to the four second support positions and are used for contact during compression to form a steady-state structure. Compared with the prior art, the invention has the remarkable advantages that: The high energy absorption and the restorability of the buffer material under multiple continuous strong impacts are considered, the bistable design is realized based on the symmetrical double-curved beam microstructure, the energy absorption is