非线性结构-地基动力相互作用问题的高效算法

The efficient method for nonlinear structure-foundation dynamic interaction problem

引入等效一致粘弹性人工边界单元及其输入方法,提出了广义坐标变换方法解决非线性结构-地基动力问题分析的高效方法.基于结构非线性动力反应问题算例与结构-地基动力相互作用系统整体算例,探讨了高效算法用于非线性结构-地基动力相互作用问题的可行性,为实现大型结构-地基系统非线性动力反应问题的快速分析奠定了基础.算例表明,作为一种快速数值计算方法,引入广义坐标变换解决强震作用下的结构-地基动力问题十分有效.

Based on an approximate closed system converted by the consistent viscous - spring boundary condition, a high efficient procedure is proposed for nonlinear soil - structure dynamic interaction,combing with generalized coordinates translation method and wave input method. To apply the high efficient method into nonlinear model, the problem of soil - structure dynamic interaction, which takes the influence of material nonlinear into consideration, is studied by examples of both the rigid - base structure and the soil - structure dynamic interaction system. This study provides a useful method for solving the nonlinear problem of the large soil - structure dynamic system. The results showed that this numerical method with generalized coordinate translation is efficient for soil -structure dynamic prob-lem in strong emotion.