哑铃型弹丸超高速撞击防护板数值仿真

Numerical simulation of hypervelocity dumbbell projectile impacting on protection plate

对哑铃型弹丸超高速撞击Whipple防护板进行数值仿真分析,用前板弹孔直径和后板毁伤直径表征防护板的毁伤特性,得到撞击速度、前板厚度、前后板间距等因素变化对防护板毁伤特性的影响规律。在相同条件下的撞击研究结果表明:随着撞击速度的增加,前板弹孔直径和后板毁伤直径均增大;随着前板厚度的增加,前板弹孔直径增大,后板毁伤直径减小;随着板间距的增加,后板毁伤直径增大。

The numerical simulation analysis of hypervelocity dumbbell projectile impacting on Whipple protection plate is carried out.The damage characteristics of the protection plate are characterized by the projectile hole diameter of the front plate and the damage area diameter of the rear plate.The influence law of the impact velocity,the thickness of the front plate and the distance between front and back plates on the damage characteristics of the protection plate is obtained.The study results under the same conditions show that:both the projectile hole diameter of the front plate and the damage area diameter of the rear plate increases with the increasing of impact velocity;with the increasing of the front plate thickness,the projectile hole diameter of the front plate increases,but the damage area diameter of the rear plate decreases;the damage area diameter of the rear plate increases with the increasing of plate distance.