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为寻求同时解决定向战斗部对破片速度和杀伤密度增益的方法,以普通圆柱形战斗部为对照组,建立正六棱柱战斗部的三维模型。利用LS-DYNA对二者破片在端面中心、沿母线方向的偏心四点、八点3种起爆方式下的驱动过程进行模拟,评价破片的分散程度。结果表明:棱柱形战斗部的破片在目标方向的密度显著提升,是等径等高圆柱形战斗部的1.76倍;结合修正的格尼公式对棱柱形战斗部破片初速的估算,以及对破片单元速度数据的统计,分析得出偏心四点、八点起爆对棱柱形战斗部破片平均速度的增益分别为10.4%、21.2%;六棱柱战斗部与圆柱形战斗部在同一起爆方式下速度增益的效果相近。
In order to seek for the solution of the directional warhead to the fragment velocity and kill density gain at the same time, a three-dimensional model of a regular hexagonal warhead was established by taking the ordinary cylindrical warhead as a control group. The LS-DYNA was used to simulate the driving process of the two fragments in the center of the end face, four-point eccentricity along the direction of the bus bar, and the three-point eight-point detonation mode to evaluate the degree of fragmentation. The results show that the density of prismatic warheads in the target direction is significantly increased, which is 1.76 times of the equivalent cylindrical warhead. Based on the modified Gurney’s formula, the initial velocities of prismatic warheads are estimated, According to the statistics of the speed data, the gain of the average four-point and eight-point detonation on the average velocity of the prismatic warhead was 10.4% and 21.2%, respectively; the speed gain of the hexagonal warhead and the cylindrical warhead in the same initiation mode The effect is similar.