尖卵形弹丸侵彻加筋薄靶剩余速度的理论分析

Theoretical Analysis on Residual Velocity of Oval-nosed Projectile Penetrating into Stiffened Thin Plate

基于尖卵形弹丸侵彻十字形加筋薄靶的花瓣型破坏模式,研究弹丸动能损失主要用于花瓣弯曲应变能、裂纹扩展应变能和加强筋弯曲应变能。利用能量守恒原理得到了弹丸穿甲后的剩余速度计算公式,并对不同初始速度的弹丸侵彻不同厚度薄板的过程进行了数值模拟,模拟结果与理论计算结果基本一致。结果表明,所得到的剩余速度计算公式具有一定的有效性。

Based on the petaling failure mode of the oval-nosed projectile penetrating into the stiffened thin plate,the lost kinetic energy of the projectiles mainly results from petal bending strain energy,strain energy of crack propagation and bending strain energy of stiffened beam during the penetrating process.The residual velocity of the projectile is obtained by using the energy conservation principle. The penetrating processes of projectiles with different initial velocities against thin plate with different thicknesses are also simulated. The simulation results are consistent with the theoretical calculation results.