关键词: 爆炸力学 , 圆管 , 长杆弹 , 异型侵彻体 , 侵彻 , 理论模型

Abstract: A simplified analytical model for the penetration depth ratio between circular tube and rod to semi-in?finite 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 ef?fects of their length ratio, impact velocity ratio, crater/penetrator diameter ratio and tube’s inner/outer diame?ter ratio on the ratio between tube and rod penetration depth was derived. The tube pentrator9 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 ana long rod penetrators is compared with exper?imental result and shows fairly good consistency with the later. All results can be used for novel KE projectile de?sign, which consists of large length/diameter ratio rod and long circular tube.

Key words: explosive mechanics , circular tube , long rod , novel penetrator , penetration , analytical model