弹体侵彻混凝土过程中炸药动态响应数值模拟

Numerical Simulation of Dynamic Response of Explosive Charge in the Process of Loaded Projectiles Penetrating into Concrete Targets

采用动力学计算程序AUTODYN对弹体侵彻混凝土过程进行了数值模拟。重点分析了弹体内部炸药所受压力的变化规律及装药与壳体之间的相互作用。数值模拟结果表明:弹体在侵彻过程中,装药前端主要受压缩作用,导致弹体前端的炸药产生明显的塑性应变。弹体尾部装药受到拉伸和压缩作用,并且装药和壳体尾部之间发生强烈碰撞,装药遭受明显的冲击作用。根据计算结果,侵彻型弹药设计应重点防护装药前端和尾部。

The process that a loaded projectile penetrated into a concrete target was simulated by using hydrodynamic code AUTODYN.The study emphasis focused on the pressure imposed on the explosive charge and the interaction between the explosive charge and the projectile shell.Calculated results show that： the fore of the explosive charge mainly endures compressed effect which induces to plastic damage,and the tail of the explosive charge endures both compressed effect and tensile effect,as well as it is impacted by the tail shell which leads to strongly shock effect on the tail of explosive charge during the projectile penetration.According to our investigation,both the fore and the tail of the explosive charge need to be protected in the projectiles are used to penetration.