起爆方式对新型前级并联聚能战斗部影响的数值模拟

Analysis of new pre-charge level parallel shaped charged penetrating into the damage model for concrete

根据混凝土毁伤目标的需要,综合杆式射流和EFP各自的特点提出了一种新型前级并联装药结构,并用有限元LS-DYNA软件对其在三种起爆方式下并联聚能装药形成杆式射流和EFP的过程进行了理论分析和数值模拟。结果表明不同起爆方式下四周EFP的头部速度以面起爆最大,环起爆次之,中心点起爆最差。中心起爆和面起爆不能保证EFP的方向一致性,环起爆在选择合适的起爆半径下可以保证EFP垂直侵彻靶板。

According to the need of damaging concrete target, Integrated the trait of EFP and rod-shaped, a new parallel structure ofpre-charge level is proposed, a theoretic analysis and a numerical simulation analysis for the rod-jet and EFP formation process of parallel structure of pre-charge with three different ways of initiation are performed. The results that the magnitude of velocity of EFP head with area initiations at end is largest, that with rod initiation takes second place, the smallest is speed of jet head formed at vicinity of end with end point-initiation; the point-initiation and area initiations can not guarantee conformity of direction, ring- initiation can insure the EFP erod the target uprightly in suitable radius.