时间迭代步长对单层网壳非线性动力分析的影响

Influence of iterative time steps to the nonlinear dynamic response of single-layer lattice shell

在进行地震作用下网壳结构的非线性动力分析及动力稳定分析过程中,不同的计算时间迭代步长对网壳的动力响应有着很大的影响,进而影响到动力稳定临界荷载的判断。针对两个网壳实例就时间迭代步长对其非线性动力响应的影响进行分析比较,在兼顾计算精度及计算量的基础上,提出了针对此类结构非线性动力分析时间迭代步长的选取建议。

In the nonlinear dynamic analysis and dynamic stability analysis of the single-layer lattice shell structures under earthquake loads, the length of the iterative time steps has a certain extent influence to the dynamic response, and therefore affects the judgment of the dynamic stability critical load. In the paper, the comparison and the analysis of the influence of iterative time step to the nonlinear dynamic response are presented based on the numerical analysis results of two lattice shell structures. In consideration of the analysis precision and the time consuming of computer, some suggestions are presented for the choice of the length of iterative time steps in the nonlinear dynamic analysis of the lattice shell structures.