装药约束对腔室爆炸冲击波传播特性影响的数值分析

Numerical Analysis for Influence of Restriction of Charges on Shock Wave Propagation Inside Cavity

基于显示动力分析有限元程序LS-DYNA3D,用流固耦合数值分析方法对炸药装药在腔室中心、墙角、地面中心、墙棱边等不同约束情况下爆炸冲击波的传播特性进行了数值计算。分析了腔室爆炸冲击波发生正、斜反射、马赫反射以及叠加现象下,腔室特殊位置处冲击波的压力变化情况。对比几种装药约束对冲击波传播特性的影响,在腔室多约束装药条件下爆炸相对于低约束装药有更好的冲击波毁伤效应。

Shock wave propagation under different restriction, such as exploding in the center of the cavity, on the ground, the edge of wall, or in the corner, was all computed based on LS-DYNA3D with the method of fluid-structure interaction. The pressure of shock wave was analyzed with the complex propagation of exploding in the cavity. By contrasting the change of blast pressure under different restriction, the pressure of exploding in the corner or on the edge of wall, was greater than the condition of lower restriction.