在未来十年中，微机上的非线性结构分析将不仅成为可能，而且会成为计算力学主要的开发对象。
In the next ten years, nonlinear structural analysis on microcomputer will be the major object of developments.
本文详细地分析了囊体结构的非线性变形过程及刚度矩阵出现奇异的原因；
This paper analyzes the nonlinear deformational process of the envelop structure and the cause of stiffness matrix singularity in details.
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。
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.
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