layered target meaning in English

层状靶

Firstly on the basis of twin shear unified strength theory and spherical cavity expand theory it is established the expression about target defense force , given the equations of rod projectile penetrate and impact velocities on ceramic / composite target under the same pressure and verified through the experiment . secondly the analysis model of ceramic / grfp / steel composite multi - layer target penetrate depth employing above differential equation of target defense force , penetrate velocity and rod velocity . there are two team of experiments which testify separately the penetrate depth and effect with different length - to - diameter
首先，基于双剪统一强度理论和球型空穴膨胀理论建立了靶板抗力表达式，并通过压力相等条件给出了杆式弹侵彻陶瓷复合靶板的侵彻速度与撞击速度的表达式，最后用试验进行了验证；其次，利用上面的靶板抗力表达式、侵彻速度、弹杆速度的微分方程，建立了陶瓷/玻璃钢/钢板复合多层靶板侵彻深度分析模型，分两组试验对侵彻深度、不同长径比的侵彻效果进行了验证;最后，建立了杆式弹垂直侵彻陶瓷多层复合靶板的工程模型，给出了预测靶板抗弹性的k 。