【摘要】 基于非线性屈曲理论 ,以非线性有限元为工具 ,建立了单层网壳结构的稳定性分析的有效计算方法。将具有广泛适用性的判断结构稳定状态的准则引入到结构强度计算中 ,使强度问题与稳定问题统一在一起 ,并以结构当前刚度参数来反映结构的软化程度 ,采用柱面弧长法进行过程跟踪。重点研究了单层柱面网壳的非线性屈曲行为更多还原

【Abstract】 This paper is concerned with the study of the computational methods on stability of single layer latticed shells. Here, based on the finite element theories, the mathematical formulas of structural stability criterion are presented. According to the consistence of the equations, the strength and stability problems of structure are integrated in the program. The improved arc length method is used to trace the structural response, in which the current stiffness parameter is employed to reflect the nonlinear level of the structure. Furthermore, the nonlinear stability behaviors of single layer cylindrical reticulated shells are efficiently investigated in this paper.更多还原