复合材料层合曲板的非线性动力稳定性

 建立了复合材料圆柱曲板受外压作用的大变形动力学控制方程。在边界夹支可移的条件下借用数值方法求得曲板中面随时间的响应历程。将动力响应与Ｂ－Ｒ准则相结合,给出了对称正交铺层复合材料曲板受均布突加外压作用的动态失稳“跳跃”特性图。讨论了铺层顺序和结构参数对曲板跳跃特性的影响。

NONLINEAR DYNAMIC STABILITY OF COMPOSITE LAMINATED CYLINDRICAL PANELS

Based on the classical large deflection theory of shallow shells, the governing equations for the composite laminated cylindrical panel subjected to lateral pressure are established. By the use of the orthogonal function approaches under the condition of clamped edges with movable support, the governing equations can be numerically solved for their dynamic response at any instant. Attention is focused on the dynamic buckling behavior of the symmetric orthotropic laminated panel under uniform step pressure by utilizing B R criteria associated with the dynamic response history of the panel. The influence of the ply sequence of the lamina and the structural parameters on the dynamic "snap" of the panel is discussed based on the numerical results.