EFP/预制破片复合战斗部结构设计与分析

Structural Design and Its Analysis of EFP/Prefabricated Fragment Composite Warhead

为增大毁伤面积并提高侵彻能力,设计不同结构的爆炸成型弹丸(explosively formed penetrator,EFP)/预制破片复合战斗部,综合挡环结构及预制破片钨球的排布方式,得到4种方案。应用ANSYS/LS-DYNA对战斗部成型过程进行数值模拟,通过不同战斗部结构方案分析,研究挡环结构及预控破片排布方式对毁伤元成型过程和毁伤效果的影响。结果表明:当挡环顶部与药型罩底部处于同一平面时,形成的EFP速度更高、长径比更大、长度更长,且内圈钨球的轴向速度更高;采用内圈钨球26枚、外圈钨球32枚的钨球排布方式的战斗部,其内、外圈钨球发散角更大,能形成具有良好侵彻能力且密度均匀的破片场,仿真与实验结果一致。

In order to enlarge the damage area and improve the penetration ability of EFP/prefabricate fragment warhead,different structures are designed.There are 4 schemes of baffle ring structures and prefabricated fragment arrangement modes.The formation processes are simulated by ANSYS/LS-DYNA to study the influences of baffle ring structures and prefabricated fragment arrangement modes on the kill element forming process and the damage effectiveness.Result shows that,when the top of the baffle ring and the bottom of the liner are in the same plane,the warhead can form EFP with a higher velocity,larger diameter ratio,and longer length and the tungsten spheres in inner ring with a higher axial velocity.The warhead with 26 tungsten spheres in inner ring and 32 tungsten spheres in outer ring can form tungsten spheres with a greater divergence angle,and can obtain a fragment field with good penetration performance and uniform fragment density.The simulated results are in good consistent with the experiments.