中文摘要：

运用ANSYS软件建立战斗部装药孔隙模型，采用LS—DYNA流固耦合分析方法对球形孔隙的变形特性进行数值模拟，研究孔隙体积的相对变化对发射安全性的影响。得到发射载荷下，孔隙尺寸、位置、装药力学性质对孔隙体积相对变化的影响。研究表明：同一载荷，相同的加载时间内，同一尺寸孔隙位于战斗部装药的底端比处于其他位置。其体积的相对变化较大；孔隙体积的相对变化与孔隙尺寸密切相关；同一载荷作用下，处于装药相同位置的孔隙，当装药的屈服极限变小时，孔隙体积相对变化大。

英文摘要：

Warhead charge pore model was built by the ANSYS software, and transformation characteristic of spherical pore was numerical simulated with solid-liquid coupling method of LS- DYNA, and the effect of relative change of pore size on launching safety , he effects of pore size, pore position and mechanical character of charge on the relative change of pore size were studied. The study indicates that with the same load and loading time, the pores with identical size at bottom of warhead, whose relative change of size is bigger than those placed at other positions; relative change of pore size is closely related with pore size; The size of pores which are at the identical position, whose relative change is big when yield limit decreases under the same load.