多爆炸成型弹丸战斗部(MEFP)能有效提高炸药利用率和命中概率。基于ANSYS/LS-DYNA软件研究了刻槽式MEFP战斗部侵彻双层无间隔钢靶的过程,通过使用三维建模方法、不同材料分别选取不同的状态方程和本构方程,采用实体单元和壳单元进行网格划分,得到了刻槽式MEFP战斗部对靶板侵彻的数值计算结果。结果表明:刻槽式MEFP侵彻过程要经过开坑、联合侵彻、贯穿3个阶段。模拟结果与实验结果基本一致。

Multiple explosively formed projectiles (MEFP) can effectively raise utilization and hitting probability of explosive. The process of penetrating double-layer nonseptate steel targets with grooved MEFP was studied based on ANSYS/LS-DYNA in this paper. The results of numerical calculation was got by creating 3D model, different state equations and constitutive equations were selected by different materials, meshing was conducted by solid element and shell element. Calculated results show that penetration process should pass through three stages: spud-in stage, unite penetration stage and throughout stage. The simulation results are consistent with the experimental results.