超音速侵彻混凝土过程中装药安定性结构设计的动摩擦理论分析

 根据侵彻过程中弹体内部装药的弹性变形假设，利用弹体结构与内部装药的相对位移、摩擦功、热力学原理和热点理论，提出了装药热安定性设计的弹性理论分析方法。计算中，侵彻弹体的响应函数从空穴膨胀理论出发；利用弹塑性材料中应力波Hugoniot跳跃条件以及流体力学动量和质量守恒方程，分析了弹体侵彻混凝土过程中的弹体表面径向应力；结合牛顿第二定律，采用有限差分技术，获得了弹体侵彻过程的轴向阻力。通过弹性理论分析，得到了弹体侵彻过程中影响装药安定性的重要设计参数，为装药安定性设计提供了理论依据。

A Dynamic Friction Analysis Method of Charge Survivability during Supersonic Penetration of Concrete Targets

Based on the assumption of elastic deformation of charge,a novel theoretical analysis method for charge survivability in the process of penetration is proposed by using relative displacement between projectile body and internal charge,friction work,hot spot theory,and principle of thermal dynamics.The resistance function during penetration is based upon the cavity expansion theory in the analysis.The radial stress on the projectile surface is obtained utilizing mass and momentum conservation equation and Hugoniot jump condition.In addition,the resistance forces in the supersonic penetration of concrete targets are calculated with finite difference method and Newton’s Second Law.The important design parameters of charge affecting the charge survivability in the penetration are revealed from the elastic theoretical analysis,which provide a theoretical basis for the survivability design of housing explosive.