含能破片引爆带壳炸药过程的数值模拟

Numerical simulation on detonating shelled explosives by energetic fragments

将引爆模拟战斗部等效为带铝壳炸药，设计了一种新型含能破片作为毁伤元，利用非线性有限元LS-DYNA软件对该含能破片侵彻、引爆带壳炸药的作用过程进行了数值模拟。用“升降法”得到了该“含能破片”对不同盖板厚度带壳炸药的引爆速度，同时与普通破片引爆同规格带壳炸药进行了对比，并进行了实验验证。结果表明，通过控制含能破片的撞击速度和含能物质的延迟起爆时间，可有效引爆盖板厚度为8～16mm的带铝壳炸药。

Simulated ammunitions were equivalent to aluminum-shelled explosives and a new energetic fragment was designed. The nonlinear dynamics software, LS-DYNA, was used to numerically simulate the complete processes of the energetic fragments penetrating the cover plates and detonating the shelled explosives. With the help of the up-and-down method, the impact velocities of the energetic fragments were calculated for detonating the shelled explosives with the cover plates of different thicknesses and compared with those of the solid out to verify the typical data selected from t that the explosives shelled by 8-16-mm thi trolling the impact velocities of the energetic fragments. The correspondin he numerical simulations. Th ck aluminum covers can be ef fragments and the detonation g experiments were carried e investigated results show feetively detonated by condelay times of the energetic material in the fragments.