局部双层网壳结构非线性屈曲分析

Nonlinear Analysis of the Partial Double Layer Sphterical Reticulatea Shell

以局部双层球面网壳为研究对象,采用Newton-Raphon增量迭代及弧长法对节点承受均布载荷的网壳进行了非线性有限元分析,对比研究了单层、双层及局部双层网壳的极限屈曲荷载及位移。研究结果表明,局部双层网壳能够明显改善单层网壳的稳定性能,提高其节点屈曲载荷。

By Newton-Raphon increment iterative method and arc-length method, the nodes of partial dou- ble layer spherical reticulated shell supporting uniform distributed forces are analyzed with nonlinear finite element theory. The ultimate buckling load and displacement of single, double layer and partial double layer spherical reticulated shell are studied in comparison to each other. The research findings suggest that the use of partial double layer spherical reticulated shell can improve the stability of single one and promote the ultimate buckling load of its nodes.