射击角对步枪弹侵彻玻璃靶后运动的影响规律

为研究射击角对步枪弹侵彻玻璃靶板影响的规律，对步枪弹侵彻玻璃靶板进行数值模拟，并通过与试验结果对比，数值方法可真实再现弹头在侵彻玻璃过程中的运动行为.结果表明，弹头速度总体变化趋势是逐渐减小，对符合实际使用情况下的速度变化可按射击角分为（0°，5°，10°）（15°，20°）（25°，30°）3个速度梯度，每个梯度内的速度变化基本一致，加速度变化阶段分为4个阶段，呈现双峰现象，对不同射击角下的靶后攻角和速度矢量偏角分析发现，弹头稳定性可按射击角分为（0°，20°）（25°，50°）（55°，80°）3个区间，分别对应稳定飞行、一定扰动飞行、失稳3个状态，而且剩余动能与初始动能比值基本是随着射击角增大线性减小，总体是呈负相关减小趋势. 

Influence of Penetration Angle on Rifle Projectile Penetrating Glass Target

In order to study the influence of penetration angle on the penetration of rifle projectile into glass target plate, numerical simulation of rifle projectile penetrating glass was carried out and compared with test rests,the numerical method could be used to reproduce the motion of the projectile through glass process. The results show that the overall trend of velocity change can be divided into three velocity gradients according to the penetration angle. The velocity changes in each velocity gradient are basically the same, and the acceleration changes are divided into four stages, with two peaks. Also the stability of penetrating projectile to velocity vector deflection can be divided into three gradients according to penetration angle, the ratio of the residual kinetic energy to the initial kinetic energy is the base,this decreases as the penetration angle increase,and the overall decrease is negative correlation.