双聚焦式破片战斗部不同起爆方式的数值模拟研究

Numerical Investigation of Different Initiation Modes for Dual-focusing Fragment Warhead

针对某结构双聚焦战斗部的爆轰驱动特性进行了仿真研究。利用DYNA3D有限元程序,模拟计算了单点、两点和三点起爆方式下的爆轰波传播过程、壳体驱动及破片的飞散特性参数。模拟结果表明,两点起爆方案得到的两个战斗部聚焦带(-17°、-14°)和(14°、17°)内集中的破片数目最多,占总破片数的43.09％,双聚焦效果最优。

Detonation drive characteristics were studied for a certain dual-focusing fragment warhead in this paper. Using DYNA3D finite element codes, key technical problems such as propagation of detonation wave, case deforming driven by detonation, scattering characteristics of fragment are numerically simulated. The simulation results show that more fragments are concentrated in two focusing regions ( -17° 、-14°) and (14°、17°) , by two initiation points. The concentrated number of fragments is 43. 09% of all ones. Simulation results obtained can be used for the initiation system of focusing fragment warhead in engineering practice.