弹体非正撞击/侵彻载荷响应的一种半经验分析方法

A Semi-empirical Method for Load and Response Analysis of Projectile Non-normal Impact/penetrating Target

针对非正撞击/侵彻情况下的弹体结构动响应预示问题,将球形腔膨胀理论与经验方法结合,提出了一种弹体非正撞击/侵彻动载荷计算的半经验方法。基于本文半经验方法,沿终点弹道计算侵彻弹体的动载荷时间历程,进一步运用模态叠加法求解弹体结构动响应,对多个弹体算例的侵彻过载和应力进行预示并与数值仿真结果对比表明本文方法具有较强适应性,弹体结构最大应力预示结果的相对误差能达到30%左右。

Based on spherical cavity-expansion theory alone with empirical method,a semi-empirical method for calculating the load of projectile under non-normal impact/penetrating has been developed.The time history of impact/penetrating load along projectile’s terminal ballistics is calculated by using the semi-empirical method.Furthermore,the impact response of projectile under impact/penetrating load is calculated by using the modal superposition method,the penetration deceleration and structure stress of projectiles are calculated and compared with the numerical simulation results,it shows that the relative error of the projectile’s maximum stress is about 30%,and that the semi-empirical method has a better applicability.