基于动能耗散的双层铝板结构的高速撞击防护性能

Protection Performance of Double-wall Structure of Al-plate Subjected to Impact Effect of High Velocity Projectiles Based on Kinetic Energy Dissipation

通过铝球弹丸高速撞击单层铝板和双层铝板结构的动能耗散特性分析,在弹丸未破碎和已破碎两种撞击条件下,基于单层铝板撞击失效临界动能研究了双层铝板结构的高速撞击防护性能,并针对典型铝板防护结构的高速撞击防护性能评估结果进行了实验验证。结果表明,当铝球弹丸高速正撞击一定厚度的单层铝板时,铝板发生穿孔失效时的临界撞击动能近似为常数。当铝球弹丸高速正撞击双层铝板结构时弹丸击穿前板后的剩余动能,表现为弹丸初始撞击动能的比例耗散。在弹丸破碎段撞击速度区间,使双层铝板结构后板发生穿孔失效的弹丸直径越大,在弹丸击穿前板后的撞击后板有效动能中次生小碎片动能所占的比例越大。

By analyzing characteristics of the kinetic energy consumption of single AI-plate and dou ble-wall structure of AI-plate, which were just subjected to dynamic impact effect of an AI-sphere, the protection perfogreater proportion of the sum residual kinetic energy of the total fragments in the secondary debris cloud.