药型罩材料对EFP水中运动特性影响研究

针对药型罩材料对爆炸成型弹丸（EFP）水中运动特性的影响问题,本文利用ANSYS/LS-DYNA有限元分析软件,基于紫铜材料EFP水中侵彻试验基础,结合相关理论研究仿真对比分析了不同密度材料（10号钢、钽及铝）、同密度材料（纯铁、10号钢、20号钢）以及高密度材料（钽、钨）所形成EFP的水中侵彻情况,找出药型罩材料性能对EFP水中速度衰减的影响.结果表明,密度对EFP水中侵彻过程具有至关重要的影响,EFP形状一定的条件下密度越高则存速能力越强,若密度相近则衰减规律趋于一致,且钽、钨等重金属药型罩在水中聚能战斗部的应用具有广阔前景.

Effect of Liner Material on Motion Characteristics of EFP in Water

Aimed at investigating the relation between the liner materials and flight characteristics of explosively formed projectile (EFP) in water, we studied underwater penetration capacities of EFP, which are formed by three groups of materials, namely, different density materials (10 steel, tantalum and aluminum), same density materials (pure iron, 10 steel, 20 steel), and high-density materials (tantalum and tungsten), using ANSYS/LS-DYNA software and on the basis of experimental data of copper material EFP in water. In addition, the effects of liner material on velocity decrease of EFP was presented. The results show that density plays a crucial role on the penetration capacity of EFP in water. Given the shape of EFP, the ability of keeping velocity are improved with increasing density. Correspondingly, the tendency of velocity reduction is similar for EFP with same density. Tantalum, tungsten, and other high-density metal material liners have broad prospects in the application of underwater shaped charge warhead.