串联聚能装药延迟时间与装药间距匹配关系研究

为降低串联聚能装药战斗部前级爆轰对后级JPC成型的干扰,采用LS-DYNA软件,对不同装药间距、不同延迟起爆时间下后级JPC的成型过程进行了数值模拟. 获得了装药间距、延迟起爆时间对后级JPC成型的影响规律,分析了最佳延迟时间下以及头部速度最低对应延迟时间下后级JPC头部速度降随装药间距的变化规律,建立了延迟起爆时间与装药间距的匹配关系. 结果表明:最佳延迟起爆时间随装药间距的增大而增大,当前后级装药间距达到2.5倍装药口径,延迟时间为40 μs,后级JPC头部速度降只有11%. 针对优化结构开展了侵彻45#钢靶实验,串联聚能装药战斗部能够实现反硬目标大开孔兼顾穿深的要求. 

Research on Matching Relationship Between Tandem Shaped Charge Delay Initiation Time and Charge Interval

To reduce the interference of preposition charge explosion of tandem shaped charge warhead on the formation of postposition JPC, the formation process of postposition JPC was simulated under different charge interval and delay initiation time with LS-DYNA simulation software. The rules that the charge interval and delay initiation time influence postposition JPC formation were obtained, and the rules that postposition JPC tip velocity drop change with charge interval were analyzed in the optimal delay initiation time and the delay initiation time of lowest tip velocity. Moreover, the matching relationship between delay initiation time and charge interval was established. The results show that the optimal delay initiation time increases with the increase of charge interval, and only 11% of the tip velocity drop occurs when the charge interval reaches 2.5 times charge diameter and the delay initiation time reaches 40 μs. A penetration experiment on the 45# steel target was carried out to optimize its structure. The results show that tandem shaped charge warhead is able to satisfy the requirement of large hole diameter and deep penetration depth on hard target.