介绍了电磁发射拦截系统的组成和工作过程，分析了影响动能穿甲弹穿甲能力的因素.以拦截弹与穿甲弹相碰撞的物理过程为例，建立了拦截弹和穿甲弹的三维有限元模型；对拦截弹与穿甲弹在穿甲弹与拦截弹侧面平行、穿甲弹与拦截弹大圆孔轴线共面和穿甲弹在接触面上的投影与拦截弹接触面长边的夹角为45°这3种情况下的碰撞过程进行了有限元仿真，分析了拦截弹与穿甲弹碰撞后的速度变化及状态改变情况，结果表明，拦截弹与穿甲弹相碰后，穿甲弹对装甲车辆的破坏力明显降低.

The makeup and the working principle of the electromagnetic launching interception system (EMLIS) were presented, and the factor of influencing the ability of kinetic energy armour piercing shell was analyzed. Taking the physical process of interceptor impacting on armour piercing shell as an example, a 3D finite element model (FEM) of interceptor and armour piercing shell was set up. The finite element simulation of interception projectile impacting armour piercing shell was performed when armor piercing shell is parallel to the side of interception projectile, armor piercing shell is coplanar to the big hole axes of interception projectile and projection of armor piercing shell at interface make an angle of 45° with the long side of interception projectile interface. The variation of velocity and state were analyzed after the interception projectile impacting against armour piercing shell. The results reveal that damage of armour piercing shell piercing armor vehicle is reduced obviously.