平面夹层炸药对射流干扰的数值模拟

Numerical Simulation of the Disturbance of Sandwich Explosive on Jet

采用三维有限元程序（LS-DYNA）模拟了射流以不同入射角侵彻装有平面夹层炸药的靶板过程，并和无平面夹层炸药情况进行了对比分析，发现平面夹层炸药爆炸后，运动的面板和背板对射流有严重的干扰和切割效应，使射流偏转、弯曲、着靶点分散，导致侵彻能力下降。对于垂直侵彻，干扰不明显。对于斜侵彻情况，平面夹层炸药结构使射流的侵彻能力下降约58％～75％，干扰程度随入射角的增大而呈递增趋势。

The process of penetrating into the sandwich explosive by the jet at different incident angles was simulated using 3D finite element code （LS-DYNA）, and compared to the corresponding case without sandwich explosive. The simulation and the comparison show the following results. After the sandwich explosive ignites, the active panels have great disturbance and incision on the jet, i.e. they make the jet deviated and bended, the target impact point dispersed and the penetration capability decreased. When the attack happens vertically, the disturbance is not obvious. For aslant penetrating, the sandwich explosive reduces the penetration capability by 58 % -75 %. The disturbance capability increases with the increase of the impact angle.