卵形头部刚性弹侵彻厚靶的半解析模型

A semi-theoretical model of ogival nose rigid projectiles penetrating into thick targets

基于确定靶体中速度势和速度场的方法分析刚性卵形头部弹体对有限厚靶的侵彻问题。推导了靶体中速度场与应力场的计算方法,利用据此编制的计算程序,计算了卵形头部钢弹体对铝靶的侵彻与穿透问题,给出了侵彻深度与剩余速度同初始碰撞速度的关系。结果表明,在对实验参数不经过任何调整的情况下,得到了同试验曲线相吻合的结果。可以看出该方法的有效性。

The problem of an ogival nose rigid projectile penetrating into a thick target has been considered in this paper based on a semi-theoretical model in order to determine the velocity potential and the velocity field in the target. The nose shape is simplified as a semi-Rankine ovoid similar to that of real long rod projectiles, and the details in nose shape does not significantly influence the penetration depth and the residual velocity in the case of thick targets. A code was compiled based on the analysis of velocity and stress fields in targets, and used to calculate penetration and perforation of an ogival nose steel projectile into thick aluminum targets. A good agreement in residual velocity and penetration depth between the calculation and the experiments is achieved without any adjustment in material property parameters.