靶后破片对装甲目标内部环境构成巨大威胁,常规试验往往难以准确获取其运动飞行规律。文中在X光试验基础上,结合有限元数值仿真对典型射流垂直侵彻钢靶产生的初始靶后破片云进行了研究,分析了破片云特性及形成机理,在此基础上提出了靶后破片“虚拟原点”概念,并建立了初始靶后破片云数学描述模型,进而求解得到破片飞散角度与速度的关系,与仿真所得结果吻合较好,为靶后破片空间威力场建立奠定了基础。

The behind armor debris(BAD) is great threat to internal environment of armored vehicle, It is often difficult for routine test to accurately obtain distribution rule of fragments. In this paper, on the basis of X-ray test, the numerical simulation method was used to study the characteristics of initial BAD cloud about typical shaped charge penetrating steel plate, and the forming mechanism of debris cloud was discussed, on the basis of this, the concept of "virtual origin" of BAD was put forward. After that, an initial mathematical description model of BAD cloud was established, thus the relationship of emission angle and velocity of each fargment was obtained, which is in good agreement with simulation results and lays a foundation for establishing power field of the BAD.