延时起爆对串联EFP成型及其侵彻效应的影响

Effect of Delay Time on Formation and Penetration of Tandem EFP

为了解决在大块度障碍物上快速开孔且孔深和孔径符合要求的难题,提出了一种前、后两级均为爆炸成型弹丸(EFP)装药的新型串联聚能装药结构。利用LS-DYNA3D有限元软件,对串联EFP装药的成型过程进行了数值仿真,分析了两级装药延时起爆对后级EFP成型的影响,并在此基础上开展了串联EFP装药侵彻45钢靶实验。结果表明:该串联EFP装药结构可充分发挥前、后两级EFP的侵彻能力,提高了侵彻效果。

In order to solve the problem about fast perforation of hunk fraise with enough depth and width,a new tandem shaped charge structure is proposed,which is composed of two same structure of EFP （explosively formed projectile） shaped charge. Using finite element software LS-DYNA3D,the forming process of this new structure and the effect of delay time on the forming process of tandem EFP are simulated and analyzed. On this basis,an experiment for tandem EFP penetrating 45 steel tar-get is conducted. The results show that the tandem EFP charge can make full use of the penetration ca-pabilities of two shaped charge, and the penetration effect is greatly improved.