同轴式多罩体EFP战斗部成型与侵彻的仿真分析

Simulation Analysis on Shaping and Penetration of Coaxial Multiple Layer Liner EFP Warhead

为提高爆炸成型弹丸(explosively formed penetrators,EFP)战斗部侵彻钢靶目标的深度,设计多层药型罩EFP战斗部装药结构。利用ANSYS/LS-DYNA软件,对5种药型罩层数的EFP战斗部成型和侵彻间隔靶板进行数值模拟,分析不同层药型罩的EFP战斗部对炸药能量利用率及穿深能力。结果表明:多层同材料的球缺型药型罩堆叠、贴合放置可形成多个分离的同轴EFP,与单层药型罩结构相比,多层药型罩结构形成串联EFP对炸药能量利用率更高,具有更大的穿深能力,对靶板侵彻后效更强,其中3层和5层结构侵彻深度提高63.4%。

Shaped charge with multiple liner structure was designed to improve the depth of EFP penetrate armored steel target. The numerical simulation of forming of EFP warhead and the process of penetrating armored steel for 5 shaped charge structures was carried out by ANSYS/LS-DYNA software. Explosive energy utilization rate and depth penetration ability with different layers liner were analyzed. The results show that the coaxial series EFP can be formed by laminating multiple layer hemispherical liners with the same material. Compared with the single-layer structure, the multi-layer structure can deliver higher energy utilization and greater penetration ability. The depth penetrated by 3 and 5 series EFP was increased by 63.4%.