（1 广东工业大学建设学院 广州 510006; 2 广州航海高等专科学校 510725）
【提要】以中部单层、周围局部双层的球面网壳为对象，采用NewtonRaphson增量迭代及弧长法对结构进行了非线性有限元分析，总结了此类网壳结构的失稳规律，并且得出了结构由单层过渡到双层时临界荷载的变化规律。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，提高其网壳的屈曲荷载，既具有双层网壳的稳定性，又能节省钢材，是一种理想的空间结构形式。
【关键词】 局部双层球面网壳 非线性屈曲 弧长法
Nonlinear Analysis of Partial Double Layers Spherical Reticulated Shell/Guo Ｙongchang１，Xie Zhihong２,Li Lijuan１，Liu Feng１(1 Guangdong University of Technology, Guangzhou 510006,China；2 Guangzhou Maritime College,Guangzhou 510725,China)Abstract:By NewtonRaphon increment iterative method and arclength method，the
 nodes of partial double layers spherical reticulated shell subjected to uniform distributed forces are analyzed with nonlinear finite element theory.The behavior of the critical load is obtained from singlelayer reticulated shell to doublelayer reticulated shell.The research results show that the use of partial double layers spherical reticulated shell can improve the stability of single layer one and promote the ultimate buckling load of its nodes.
Keywords:partial double layers spherical reticulated shell; nonlinear buckling; arclength method
*广东省自然科学基金资助项目（032489），广州市科技计划项目资助项目（2003Z3D0221）。