圆管与圆杆组合体对半无限均质钢靶侵御深度研究

依据圆管、圆杆初始撞击动能与弹坑体积之比相等的假设，建立了同材料圆管与圆杆对半无限均质靶板侵彻深度之比的简化理论模型。推导出圆管与圆杆的侵彻深度之比是两者的长度比、初始撞击速度比、坑径比和圆管内外径比的函数。在同一初始撞击速度、相同长度、圆杆直径不大于圆管内径条件下，对影响圆管和同长度同材料圆管与圆杆组成的圆管一圆杆异型侵彻体侵彻深度的参量进行了讨论，并给出圆管与圆杆侵彻深度之比的变化范围。圆管与圆杆侵彻深度之比在同材料同长度下理论计算值与实验数据有很好的一致性。所有这些都为伸缩式、大长径比新型动能穿甲弹结构设计提供了理论基础。

Study on Penetration Depth of Circular Tube and Rod Penetrator to Homogeneous Steel Target

A simplified analytical model for the penetration depth ratio between circular tube and rod to semi-infinite homogeneous steel targets was developed in this paper according to an assumption that the ratio of initial impact energy to crater volume for the tube penetrator equals to that of rod penetraor.A function to describe effects of their length ratio,impact velocity ratio,crater/penetrator diameter ratio and tube's inner/outer diameter ratio on the ratio between tube and rod penetration depth was derived.The tube pentrator's crater depth in the different conditions was discussed and the range of penetration depth ratio for two penetrators was obtained also.Another result of the analysis is an approximate formula for the penetration depth of novel KE penetrator.The theoretical prediction of the penetration depth ratio of tube and long rod penetrators is compared with experimental result and shows fairly good consistency with the later.All results can be used for novel KE projectile design,which consists of large length/diameter ratio rod and long circular tube.