半预制破片PELE弹丸效能的数值分析

为研究壳体刻槽长度和深度对半预制破片PELE弹丸效能的影响，对5种不同刻槽长度和不同深度的PELE弹丸侵彻4340钢质靶板的过程进行数值分析。结果表明：半预制破片PELE弹丸比普通PELE弹丸的后效毁伤性能有显著提高；不同刻槽长度的半预制破片PELE弹丸，随刻槽长度的增加，形成破片的最大径向速度变化较小，破片数量减少，形成破片的大小、质量逐渐增加，动能增大，毁伤性能增强；随着刻槽深度的增加，形成破片的最大径向速度显著增加，破片数量增多，但破片的大小、质量逐渐减小，动能减小，毁伤性能降低。

Numerical study on the damage efficiency of half-premade fragmented PELE

Numerical simulations of five different kinds of PELE penetrating 4340 steel by LS-DYNA were carried out to study the influence of V-shaped cavity length and depth on the damage efficiency of half-premade fragmented PELE projectile.The results indicate that the damage efficiency of half-premade fragmented PELE is apparently improved compared with normal PELE;for different length of V-shaped cavity,the amount of fragments decreases and the size of fragments increases as the length increases,and the damage efficiency is therefore enhanced;as to different depth of V-shaped cavity,the amount of fragments increases and the size of fragments reduces as the depth increases,and the damage efficiency is weakened.