A incremental virtual work equation, which is suitable for geometric nonlinear analysis of structures, is derived in this paper.
本文从适用于几何非线性分析的增量形式的虚功方程出发，建立了有限元计算公式。
Based on the geometrical nonlinear finite element (GNFE) theory, a curved quadrilateral isoperimetric element with 8 nodes for initial form analysis of tensile membrane structures is presented.
本文根据几何非线性有限元理论，提出张力膜结构初始形态分析的8结点曲面四边形等参单元。
The time-stepping FEM model for the dynamic analysis of power system is established considering the nonlinear characteristics of internal generators and typology structures of external circuit.
建立了既考虑发电机内部非线性又考虑外部电路拓扑结构的用于系统动态分析的时步有限元模型。
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