内衬对杀伤战斗部破片飞散特性影响研究

Study on influence of inner linning on fragment scattering characteristic of fragmentation warhead

为提高杀伤战斗部破片轴向杀伤威力,基于Shapiro公式,改进杀伤战斗部内衬曲线,设计了破片飞散角为5°和9°杀伤战斗部。使用LS-DYNA有限元软件和ALE算法,对破片飞散过程进行了数值仿真计算,进行了战斗部原理样机静爆试验,证实了内衬曲线的合理性,分析了内衬曲线形状及厚度对破片飞散特性的影响。结果表明:飞散角试验值及仿真计算值与理论设计值误差在8%之内;破片飞散角设计值越小,内衬曲线曲率越大,破片初始飞散速度越小;适当增加内衬厚度,破片初始飞散速度增大,破片飞散角减小。

In order to improve the axial fragments killing power of the fragmentation warhead,based on the Shapiro formula,a design method of the lining curve of the fragmentation warhead was proposed,and the fragmentation warhead was designed with a fragment scattering angle of 5°and 9°by using this method.Using LS-DYNA software and ALE algorithm,the numerical simulation calculation of fragment scattering process was carried out,and the static explosion test of the warhead prototype was carried out to verify the rationality of the lining curve design method.The influence of the shape and thickness of the lining curve on the scattering characteristics of the fragments was analyzed.The results show that the error between the experimental value and the simulation calculation value of the scattering angle and the theoretical design value is within 8%;The smaller the design value of the fragment scattering angle,the greater the curvature of the lining curve,and the smaller the initial scattering speed of the fragment;When the thickness of the inner lining is appropriately increased,the initial scattering speed of the fragments increases,and the scattering angle of the fragments decreases.