基于LS-DYNA对高速运动战斗部中预制破片飞散规律的数值模拟

Numerical Simulation of Preformed Fragment Distributing Regularity with the Warheads in High-speed Movement Based on IS-DYNA

战斗部的运动速度影响着其内部预制破片的飞散规律与杀伤能力。本文运用LS-DYNA软件对预制破片随战斗部运动速度变化的飞散规律进行数值模拟,分析预制破片运动速度、飞散角度、起爆方式和靶板侵彻等方面的数据。分析结果表明:随着战斗部速度梯度式的增加,预制破片的动态分散角逐渐变小,且减小速率逐渐增大;动态方向角成线性上升趋势,预制破片的最大飞行速度也相应的增加,且增长速率逐渐增大。另外,起爆方式对预制破片的飞散有着重要影响。

The warhead velocity affects its internal distributing regularity of preformed fragment andkilling ability.This paper using ls-dyna software to simulate the distributing rule of preformed fragmentwith the changing of warhead velocity,make an analysis of prefabricated fragment velocity with angle ofthe flying target board,detonation mode,penetration effect and other data.The analysis results show thatwith the increase of the warheads velocity gradient type,dynamic spread angle of preformed fragmentdecrease gradually,and the rate of reducing increase gradually;dynamic direction angle into linearupward trend,preformed fragment of maximum flight speed also increased accordingly with its growthrate increasing gradually.In addition,the initiation of preformed fragment flying has important influence.