横向效应增强型弹丸正侵穿金属薄靶轴向剩余速度近似计算与分析

运用冲击波理论,对横向效应增强型弹丸(Penetration with Enhanced Lateral Efficiency,PELE)侵穿金属靶板的机理进行了分析,将PELE侵彻过程中能量损失分为外壳撞击靶板区域环形塞块获得的能量,内芯撞击靶板区域塞块获得的能量,冲击波影响范围内外壳和内芯增加的内能,外壳前端外沿和内沿对靶板冲塞剪切耗能等几部分,给出了确定这些能量的计算方法；并依据能量守恒原理,给出了PELE正撞金属薄靶板靶后剩余速度的近似计算公式。公式计算结果与多种条件下实验结果均吻合较好。分析计算所得各能量损失结果表明,弹体内芯材料的变化对弹体侵彻能力的影响较小；侵彻中靶板塞块获得的能量在弹体侵彻动能损失中比重最大；外壳前端内沿对靶板的剪切能耗对弹体动能损失的影响可以忽略。

Approximate calculation on the axial residual velocityof the PELE penetrate thin metal target plate

By using the shock wave theory, the process that penetrator with enhanced lateral efficiency (PELE) penetrated a thin metal target was analyzed. The energy loss of the PELE in the process of penetrating the target plate can be divided into three parts: the energy obtained by plug when jacket and filling hit on the target, the increased internal energy of jacket and filling, and the shear energy dissipated in the outer and inner edge on the front end of jacket in the process of penetrating the target. Based on the principle of conservation of energy and the method to determine these energies, the approximate formula of the axial residual velocity of PELE was presented. With this formula, we could calculate the axial residual velocity and the calculated results were in good agreement with the experimental data. Comparison the energy loss in the different conditions showed that the filling material has little effect on projectile penetrating ability, and the energy that the plug obtained was largest while the shear dissipated energy can be neglected.