弹体在内摩擦介质中的斜侵彻深度计算

考虑介质处于内摩擦状态下，利用球腔膨胀理论及内摩擦介质侵彻近区运动方程求得刚性弹体在侵彻过程中的阻力。在此基础上，考虑自由表面对弹体斜侵彻的影响，将斜侵彻分为3个阶段，推导了斜向侵入弹体表面上任一点的应力公式，进而得出了新的刚性弹体的斜侵彻解析解。该解与别列赞公式在形式上一致，计算结果也符合较好，从而在理论上对别列赞经验公式进行了解释。

Calculation of oblique penetration depth of projectiles into an intrinsic friction medium

Considering that the target is an intrinsic friction medium, the cavity-expansion approximation and dynamic equations of the medium near the cavity of penetration are used to calculate the resistance of the rigid warhead. The influence of the target with a free surface on penetration is taken into account and the oblique penetration process is divided into three phases. According to the above work, the formula to compute stress on the projectile surface is deduced and a new analytical solution to oblique penetration depth of the rigid projectile into the target is obtained. The solution is identical with the BLZ formula in form and the calculation results also fit well. The solution provides the theoretical explain for the BLZ formula.