弹丸斜侵彻多层金属间隔靶特性研究

Oblique Penetration Characteristics of Multi-Layered Spaced Targets by Steel Projectiles

通过对不同初速和着靶角度的弹丸侵彻多层金属靶的数值模拟以及仿真结果与试验的对比分析,得出了弹丸与间隔靶作用过程中的物理图像和时空演变规律.研究结果表明:随着弹丸对不同层的侵彻,弹丸速度呈台阶式下降,弹丸姿态随弹丸穿靶过程中速度的减小而改变加剧;弹丸速度快速下降的时空点对应于弹丸的过载峰值位置;弹丸速度的阶跃次数和过载峰值次数与弹丸侵彻靶板的层数相一致;随着着靶角度和弹丸初速的增加,弹靶作用过程中弹速、过载和攻角在对应位置上均呈增加趋势.

Numerical simulation was performed to study projectiles perforating obliquely multi-layered steel plates with different initial velocity and oblique angles of target.Physical images and evolution laws of action of projectile and targets with time-space were obtained by comparing simulative results with experimental ones.The research work indicates that the velocity of projectile shows a stepped decrease and the attitude of flight changes obviously during steel projectiles penetrating and perforating spaced targets.The spacetime point of quick-drop stage of projectile velocity is corresponding with that of the extreme overload.The changing times of velocity and the times of peak value of acceleration are uniform with the number of spaced targets.When only one influencing factor is changed and other influencing factors are invariable,the residual velocity and the angle of attack and overload increase with the initial velocity of projectile and oblique angles of target.