战斗部装药在破片撞击下的冲击起爆特性研究
基金项目:
山西省基础研究计划资助项目（No. 20210302124340）。
Study on Shock Initiation Response of Warhead Charge under Fragment Impact
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摘要:研究了战斗部在破片撞击下的冲击起爆特性，进行了安全性数值仿真和试验。依据美军标MIT-MTD-2105D，使用Φ14.3 mm×14.3 mm钢破片撞击战斗部，评估其宏观响应。优化了Lee-Tarver模型，计算了壳体和装药的动力学响应。结果显示：1 885，2 158 m·s-1撞击速度下，战斗部未起爆；峰值压力和最大反应度随速度增加而增大，但破片能量下降，对战斗部威胁效能比降低。不同长径比破片的起爆阈值计算表明，随着破片质量的增加，质量侵蚀比下降，起爆阈值降低12.7%～46.2%。
Abstract:The shock initiation characteristics of warheads under fragment impact were studied, and the safety numerical simulation and test were conducted. Based on the US standard MIT-MTD-2105D, the macro response was assessed using Φ14.3 mm×14.3 mm steel fragment impacting the warhead . The Lee-Tarver model was optimized to calculate the dynamic response of the shell and the charge. The results show that the warhead doesn’t explode at 1 885, 2 158 m·s-1 impact speed; The peak pressure and maximum responsiveness are increased with the speed, but the fragment energy is decreased, and the threat effectiveness ratio to the warhead is decreased. The calculation of the initiation threshold of different aspect ratio fragments shows that the mass erosion ratio decreases and the initiation threshold decreases by 12.7%~46.2% with the mass of fragment increasing.
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