加筋板结构的塑性动力响应分析

对爆炸载荷作用下，具有１根纵向加筋及若干横向加筋的复杂加筋板结构的塑性动力响应进行了分析．采用能量方法及刚塑性本构模型，导出加筋板的静力极限变形机构的形式及判别条件．假设动力响应的变形模式与静力极限状态时的变形模式一致，计及有限变形的影响，利用Ｊｏｎｅｓ－Ｓａｗｃｚｕｋ控制方程，导出指数形式的爆炸载荷作用下，加筋板塑性动力响应的持续时间及最大残余变形的表达式．理论分析与ＡＤＩＮＡ程序的数值计算结果能很好地吻合．

An Analysis of Dynamic Plastic Response of Stiffened Plates

This paper analyses the dynamic plastic response of stiffened plates subjected to blast loading. By employing the energy method and rigid-plastic constitutive model, this Paper gives the static ultimate collapse modes and conditions. The influences of finite-deflect nons are retained in the analysis. Assuming that the modes of dynamic response are the same as static ultimate modes, we obtain the expressions of motion time and maximum permanent deformation for a stiffened plate under exponential loads by using the Jones-Sawczuk control equation.It is observed that there is reasonable agreement between the theoretical predictions and the numerical results of ADINA code.