考虑残余金属影响的长杆卵形弹重复侵彻效应理论分析

Theoretical analysis of repeated penetration of long-rod ovoid-headed projectiles considering remaining shrapnels

以滑移线理论、冲量定理、柱形空腔膨胀理论为基础，推导出了长杆卵形弹丸对岩石的侵彻计算解析公式。分“后续弹穿透残余金属”、“后续弹推动残余金属”和“后续弹与残余金属弹性碰撞”3种情况考虑了残余金属的影响，最后给出了2次重复打击下弹丸的最终侵彻深度，并指出在弹丸侵彻岩石的研究中必须考虑残余金属的影响。

Based on the slip line theory, the theorem of impulse and CCET, the analytic equations of penetration of long-rod ovoid-headed projectiles into rock are derived. The influence of the remaining shrapnels on the penetration depth is analyzed under three conditions of the following projectile penetrating through, pushing or having elastic collision with the remaining shapnels. Finally,the penetration depth of two attacks is obtained. It is also pointed out that the influence of the remaining shrapnels should be taken into account in the research of repeated penetration of projectiles into rock.