起爆点位置偏差对射流性能影响的数值模拟

Numerical Simulation for Influence of Detonation Point Location Deviation on Jet Performance

利用LS-DYNA软件仿真分析了起爆点偏差对射流侵彻等效斜靶的影响。分析结果表明:以靶板运动方向为正,当起爆点偏移量为负时,射流头部会形成一个向右的偏移量和径向速度,与靶板的运动方向一致,导致射流后期的侵彻能力下降,穿透靶板的时间较长,造成的滑槽宽度和体积偏大,对导弹的稳定性造成一定的破坏;当起爆点偏移量为正时,射流头部会形成一个向左的偏移量和径向速度,与靶板的运动方向相反,造成的滑槽宽度和体积也就相对较小,对靶板的损坏就不算明显,但射流剩余轴向速度保存得相对较好,为引爆炸药打下了基础。

This paper analyzes the influence of detonation point location deviation on jet performance by simulation analysis using LS-DYNA software.The conclusion is as follows：Taking target movement direction as positive,when the detonation point offset is negative,the liner outer shaft offset is positive or the liner outer shaft offset angle is positive,the jet head will form a right offset and a radial velocity in consistent with the movement direction of target,resulting in a decline in jet penetration ability,and a longer time of penetration and a larger hole diameter and volume,which causes some damage to the stability of missile;When the detonation point offset is positive,the jet head will form a left offset and a radial velocity in contrast with the movement direction of target,resulting in a smaller hole diameter and volume,an inconspicuous damage to the target and a relatively good remaining axial velocity of the jet penetration,which makes explosives detonate better.