摘要
为探究头部密实且小长径比的爆炸成型弹丸(EFP)后效碎片云特性,研究中采用FEM-SPH算法,针对长径比为1.2的紫铜和镍合金两种EFP模拟弹开展碎片云形成过程分析并进行拓展研究。研究发现:小长径比弹丸侵彻后效碎片云呈现由微小弹靶碎片组成的椭球状结构,弹丸尺寸和侵彻速度的增大使靶后形成数量更多且速度更高的碎片云,镍合金剩余弹丸以镦粗状存在于碎片云头部,对后效靶造成二次侵彻,而紫铜破片破碎程度较大,对后效靶形成较大面积毁伤区;在弹丸密度一定的情况下,靶板强度主要影响碎片云轴向膨胀能力,而对于不同弹靶材料,碎片云径向膨胀能力主要取决于弹靶材料密度比ρ_(b)。研究结论对EFP战斗部后效威力设计具有重要意义。
In order to explore the after-effect debris cloud characteristics of explosionally-formed projectile(EFP)with dense head and small aspect ratio,the FEM-SPH algorithm was used in this study to analyze the debris cloud formation process of EFP simulated projectile with an aspect ratio of 1.2 in red copper and nickel alloys.The study found:the fragment cloud after penetration of a projectile with a small aspect ratio presents an elliptic structure composed of tiny projectiles and fragments of the target plate.The increase of projectile size and penetration speed leads to the formation of more and higher fragment clouds behind the target.The residual nickel alloy projectiles exist in the head of the fragment cloud in an upset shape,causing secondary penetration of the target,while the red copper fragments have a greater degree of fragmentation.To form a large area of damage to the aftereffect target,when the projectile density is constant,the strength of the target plate mainly affects the axial expansion ability of the debris cloud,and for different projectile target materials,the radial expansion ability of the debris cloud mainly depends on the density ratio ρ_(b).The research conclusion is of great significance to the design of EFP warhead's after-effect power.
作者
苏发章
冀功祥
景彤
杨宝良
孟凡高
杨天威
赵太勇
王维占
SU Fazhang;JI Gongxiang;JING Tong;YANG Baoliang;MENG Fangao;YANG Tianwei;ZHAO Taiyong;WANG Weizhan(Institute of Intelligent Weapons,North University of China,Taiyuan 030051,Shanxi,China;Institute 710 of China State Shipbuilding Corporation,Wuhan 443000,Hubei,China;Xi'an Modern Control Technology Institute,Xi'an 710065,Shaanxi,China;Shandong Special Industry Group Co.,LTD.,Zibo 255201,Shandong,China;Beijing Institute of Mechanical and Electrical Engineering,Beijing 100074,China)
出处
《弹箭与制导学报》
北大核心
2024年第4期33-45,71,共14页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
山西省青年基金项目(202303021212196)资助。
关键词
EFP模拟弹
侵彻
碎片云
毁伤
数值模拟
EFP simulated projectile
penetration
debris cloud
injure
numerical simulation
