弹丸侵彻高强度混凝土的高速摄影试验研究

采用高速摄影仪，拍摄轻气炮中弹丸对侵彻面不同侵角的高强度混凝土靶体的侵彻过程，分析靶体侵角、弹丸着靶速度对弹丸侵彻靶体的运动特征。研究结果表明，弹丸以200 m/s左右的低速侵彻靶体时，弹丸在侵彻角度为0°的靶体中作水平运动，靶体侵角大于0°时，弹丸均在着靶后150～200 μs发生偏转；弹丸在靶体中的水平侵彻速度、偏转角度与其侵彻时间有很好的相关性，靶体侵角一定时，弹丸着靶速度越小，弹丸水平侵彻时所需时间越短，靶体飞溅物的速度越小；靶体侵彻面角度对靶体飞溅物速度和弹丸水平侵彻时间的影响作用相对比弹丸着靶速度的大，说明靶体侵角的大小是安全防护工事中不可忽视的重要问题。

Experimental investigation of projectile penetrating high strength concrete target with high-speed photography

Penetration process of projectile penetration high strength concrete target with different penetrating angles is captured in the light gas gun by using the high-speed photography. And the motion feature of projectile affected by the penetrating angle and penetrating velocity is analyzed. The result shows that projectile has a horizontal movement as the striking angle is 0 degree, while it deflected after 150-200 μs as the striking angle of target more than 0 degree and the projectile in a lower penetration velocity around 200 m/s. There is a positive correlation between the level penetrating velocity, deflection angle and its time. The penetrating time of projectile in horizontal movement and the spatter velocity decreased mainly affected by the decrease of penetrating velocity of projectile at a certain penetrating angle. The influence of penetrating angle on spatter velocity and projectile horizontal penetration time is relatively larger than that of the penetrating velocity of projectile. It is proved that the size of penetrating angle is important and unavoidable in security protection fornications.