Numerical calculation process to obtain the tangent stiffness matrix of structure is deduced and geometric stability of different types of structures are analyzed.
推导了铰接杆系结构切线刚度矩阵较为简便的计算生成过程，便于在编程中实现。
This paper analyzes the nonlinear deformational process of the envelop structure and the cause of stiffness matrix singularity in details.
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；
The solver of this software uses the linked list data structure to store the global stiffness matrix, which is efficient in storage and calculation.
本文的计算软件采用动态链表数据结构存贮总体刚度矩阵，具有很高的存贮和计算效率。
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