索膜结构的动力松弛找形法参数简化

Parameters Simplification of Dynamic Relaxation Method in Form Finding of Prestressed Nets and Membranes

针对膜结构找形中最小曲面的确定问题,采用动力松弛法,对迭代参数进行分析和简化,使迭代参数的简化只跟时间步长有关.通过算例分析表明,参数简化正确实用,精度较高,适用于大跨度张拉索网、索膜结构的几何非线性分析.

In order to find the minimum curve surface of membrane structure, the dynamic relaxation method is introduced on the approximate surface to get an accuracy surface, The parameters of the dynamic relaxation method are considered and simplified, so time-step is the only parameter in the method. Example analysis demonstrates that the parameters simplification is simple, practical, accurate and suitable to apply in the geometric nonlinear analysis of membrane structure.