Large Amplitude Vibration of Polymer Composite Stiffened Laminates by the Finite Element Method
Large Amplitude Vibration of Polymer Composite Stiffened Laminates by the Finite Element Method
复制标题
聚合物复合材料补强层合板大振幅振动的有限元法
DOI：
10.1177/073168449901800503
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发表时间：
1999
影响因子：
3.1
通讯作者：
T. Kant
中科院分区：
文献类型：
--
作者：
S. Goswami;T. Kant
本文用C九节点拉格朗日元对复合材料加筋板进行了大振幅自由弯曲振动分析。该单元基于一阶剪切变形理论，能够处理曲线边界。加筋板结构的大变形效应已由冯卡门的场方程的动态版本照顾。所得到的非线性方程组已被解决的直接迭代技术使用线性振型作为起始向量。加劲肋采用与板单元相同的形状函数进行模拟，以加强协调性，而不引入额外的未知量。通过对各向同性和复合材料裸板和加筋板的大量算例分析，验证了该公式的正确性，并提出了一些新的结论供今后参考。
Large amplitude free flexural vibration analyses of composite stiffened plates have been carried out using a C nine noded Lagrangian element. The element, capable of incorporating curved boundaries, is based on the first order shear deformation theory. The large deformation effect of the stiffened plated structures has been taken care of by the dynamic version of von Karman's field equations. The resulting nonlinear equations have been solved by the direct iteration technique using linear mode shapes as the starting vectors. The stiffeners have been modeled with the same shape functions as that of plate element enforcing compatibility without introduction of additional unknowns. A large number of problems of isotropic and composite bare and stiffened plates have been analyzed to validate the formulation and some new results have been put forward for future reference.