三点起爆形成尾翼EFP的数值模拟和实验研究

利用LS-DYNA软件对三点起爆形成尾翼EFP的过程进行了数值模拟，深入研究了爆轰波传播过程中的波形结构和强度的变化规律以及药型罩材料在复合爆轰波作用下驱动变形的特性和规律，加深了对三点起爆条件下药型罩形成带尾翼EFP机理的认识。在此基础上，设计了三点同步起爆装置和EFP装药进行实验。研究结果表明:设计的三点起爆装置作用可靠,满足三点起爆EFP装药的设计要求；形成的EFP弹形稳定,与计算结果吻合较好；尾翼EFP飞行过程中的速度降减小,稳定性提高。

Numerical simulation and experimental investigation of EFPs with fins formed by three-point initiation

The formation process of explosively formed penetrators (EFPs) with fins formed by three-point initiation was simulated by using LS-DYNA software. The structure and intensity of detonation waves in the transmitting process as well as the distortion characters of the liner formed by the composite detonation waves were theoretically studied to deeply understand the formation mechanism of EFPs with fins. The three point initiation device was designed and the EFP charges were tested. The results show that the designed three-point initiation device is reliable and can meet design requirements of EFP charges, and the shapes of the EFPs obtained in the experiments are stable which are in agreement with the simulations. And the speed drops of the EFPs with fins in the fly processes decrease and the stabilities increase.