为了分析飞机壁板结构受到常规弹道速度(500～1 000 m/s)下地面火炮攻击时的动态响应和形成的损伤,应用大型动态非线性有限元分析软件MSC.Dytran建立刚性弹体高速垂直撞击侵彻方形薄靶板的三维模型,采用Johnson-Cook应变率相关材料本构模型,模拟在不同的射弹碰撞速度下薄靶板的侵彻击穿过程,讨论了带加强筋薄靶板和具有初始应力的薄靶板的破坏、损伤情况.模拟结果表明,加强筋可以在一定程度上抑制靶板结构的破坏和损伤,处于承载状态下的薄板被射弹击穿后会造成更大的破坏,使承载能力迅速下降.
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