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摘要: 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。Abstract: 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 fragments.The corresponding experiments were carried out to verify the typical data selected from the numerical simulations.The investigated results show that the explosives shelled by 8-16-mm thick aluminum covers can be effectively detonated by controlling the impact velocities of the energetic fragments and the detonation delay times of the energetic material in the fragments.
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图 3 普通破片撞击带壳炸药时的压力曲线
Figure 3. Pressure curves of detonating shelled explosives with ordinary fragment
图 4 含能破片引爆带壳炸药时的压力曲线
Figure 4. Pressure curves of detonating shelled explosives with energetic fragment
图 8 破片延迟23μs起爆时参照点的压力
Figure 8. Pressure curves of reference points under 23μs delay time
图 9 破片延迟24μs起爆时参照点的压力
Figure 9. Pressure curves of reference points under 24μs delay time
图 10 破片延迟27μs起爆时参照点的压力
Figure 10. Pressure curves of reference points under 27μs delay time
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