4层横向运动板防护长细杆的数值分析

Numerical Analysis of Four-Layer Plates with Transverse Motion Defending a Slender Rod

多层横向运动板对垂直来侵长细杆的挤压、剪切能够使长细杆发生挤压和剪切变形，进而降低长细杆后续的侵彻能力，增强装甲的防护效果。利用LS—DYNA软件对多层横向、邻层反向运动的钢装甲板防护钨合金长细杆进行运动板速度和运动板的厚度分配的相关仿真计算。通过对计算结果中开坑形状、后效板侵深和装甲效能进行分析发现，随着板运动速度的增加，后效板开坑深度减小和开坑形状的非对称性加剧，运动板的干扰作用增强及防护效能提高；在运动板总厚度相同的情况下，板的层数越少，防护性能越好。

The shearing and squeezing impact on the slender rod caused by multi-layer plates with transverse motion results in the deformation of slender rod which normally penetrates into plates, decreasing the subsequent penetrating ability of the slender rod, then increasing the defending effect of armor. In the process that multi-layer steel armor plates with reverse transverse motion defend the tungsten alloy slender rod, the speed and thickness allocation of plates is simulated by LS-DYNA code. By analyzing the shape of crater and the penetrating depth in target plate and the effectiveness of armor,conclusion is obtained that as the speed of plates increases,the crater of target plate appears more asymmetric and is of smaller depth, the disturbing effect and the defending efficiency of plates are greatly increased; as the layers decrease, the defending efficiency of plates becomes better when the total thickness of plates is the same.