摘要
采用在成型装药前端加装金属隔栅的方法形成爆炸成型弹丸(EFP)破片模态,利用LS-DYNA程序仿真研究了隔栅对EFP破片成型及侵彻的影响,得到隔栅位置和结构对形成EFP破片速度和飞散情况的影响规律。研究结果表明,隔栅单元格边长为0.2倍装药口径、隔栅与药型罩端部之间的距离为1/12倍装药口径时,形成的EFP破片速度和散布面积较佳。采用优化的隔栅结构进行试验,试验与数值模拟结果吻合较好,说明该文结果可为多模成型装药的进一步研究提供参考。
The explosively formed penetrator（EFP） fragment mode is formed by attaching metal bar to the front of a warhead. Through LS-DYNA simulation procedure, the influence of a metal bar on the formation and penetration of EFP fragments is researched, and the effect of the position and framework of a bar on the velocity and spray pattern of EFP fragments is gained. The results show that： when the unit grid＇s size of bar is 0.2 times of the charge caliber, and the distance between bar and liner is 1/12 times of the charge caliber, it can form EFP fragments with good velocity and spray pattern. The structure of a metal bar is optimized and tested. The simulation results are in good agreement with the experimental data. The result can offer reference for the further study of multimode shaped charge.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2009年第5期586-591,共6页
Journal of Nanjing University of Science and Technology
基金
江苏省2009年度普通高校研究生科研创新项目(XC09E_087Z)
关键词
爆炸成型弹丸
破片
金属隔栅
数值模拟
explosively formed penetrator
fragments
metal bars
numerical simulation
