环形EFP成型及侵彻过程的数值模拟

Numerical Simulation on Forming and Penetration Process of Annular EFP

在分析环形射流形成机理的基础上,利用LS-DYNA软件对环形EFP的成型与侵彻过程进行了数值模拟。通过对环形药型罩及其聚能装药结构参数的合理匹配,解决了环形药型罩成型翻转过程中的偏斜飞散问题,探索了实用环形EFP工程设计的技术途径。计算结果表明,在0.26倍装药长径比和4倍装药口径的炸高条件下,环形EFP对45号钢的侵彻孔径可达到0.96倍装药口径。

Based on the analysis of formation mechanism of annular jet, the numerical simulation of annular EFP on forming and penetration process is carried out by LS-DYNA. Through reasonable match of parameters of annular liner and shaped charge, the problem of forming and fling apart is solved. Way of engineering design practical annular EFP is explored. The results show that, based on the 0.26 times the size of charge diameter, the annular EFP penetrating 45 steel target forms a hole of 0. 96 times the size of charge diameter when the burst height is 4 times of charge diameter.