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；
Composite bridge deck made from a variety of paving layer materials, due to the nonlinear stiffness characteristics, resulting in the force of composite bridge deck structure complex.
复合桥面铺装由多种材料分层铺筑而成，由于结构刚度的非线性特点，造成复合桥面铺装结构受力复杂。
Based on the dynamics of structure, this paper presented apratical method of two steps by double model for calculating the complexity shock-isolating system with nonlinear stiffness.
基于结构动力学理论，提出了一种用于分析计算复杂非线性隔冲减振系统的双模型两步计算法。
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