冲击载荷作用下导弹战斗部装药起爆特性研究

Initiation characteristics of missile warhead charge under impact loading

针对远程导弹在攻击地下目标过程当中时常发生对战斗部PBX炸药装药起爆毁伤效应估计不足情况,进而对导弹战斗部PBX炸药装药在高过载冲击载荷作用下的起爆响应特性进行研究。基于二级轻气炮,对导弹战斗部PBX炸药装药跨声速冲击载荷起爆特性进行一系列试验研究,结合试验结果、数值模拟、以及相关理论分析,探索能量释放行为与冲击载荷之间的相互关联,并建立相互影响机制模型。结果表明,PBX炸药装药的临界起爆压力为5. 34 GPa,完全起爆压力为12.39 GPa;建立的能量释放量和相对反应率与冲击载荷之间的相互关系与试验数据基本吻合,研究结果可为国防防御技术研究提供一定的参考价值。

In the process of a long-range missile attacking underground target, its warhead PBX explosive charge’s initiation damage effect is not enough estimated. Here, initiation characteristics of a missile warhead’s PBX explosive charge under high overload impact load were studied. Based on a two-stage light gas cannon, a series of tests were performed for initiation characteristics of a missile warhead’s PBX explosive charge under transonic speed impact load. Combining test results, numerical simulation and corresponding theoretical analysis, the correlation between energy release behavior and impact load was explored, and the mutual influence mechanism model was established. The results showed that the critical initiation pressure of PBX explosive charge is 5.34 GPa, and its full initiation pressure is 12.39 GPa;the established relation among energy release amount, relative reaction rate and impact load is basically in agreement with experimental data;the results can provide a reference for national defense technology studying.