摘要
通过引入等效粘弹性边界将三维结构—地基开放系统转化为一个近似的封闭系统,结合振型叠加方法、波动输入方法,提出了结构—地基动力相互作用问题的高效算法。采用Lamb问题研究了高效算法的精度问题,并使用高效算法分析了地震作用下三维结构—地基系统动力反应。在地震作用下,高效算法可以在满足工程精度的前提下大大提高计算效率。
Based on an approximate closed system converted by the equivalent viscous-spring boundary condition, a high efficient procedure is proposed for soil-structure dynamic interaction, combing modal superposition method and wave input method. The Lamb problem of wave propagation in infinite field is analyzed by the high efficient method for precise study. The seismic response of soil- structure dynamic interaction is analyzed by this method. The results show that, under earthquake motion, the computing efficiency is promoted evidently and the results meet the engineering precision.
出处
《四川建筑科学研究》
北大核心
2007年第5期83-87,共5页
Sichuan Building Science
基金
国家自然科学基金项目(50478014)
国家973重点基础研究项目(2002CB412706)
关键词
结构—地基动力系统
一致粘弹性人工边界
振型叠加
精度研究
dynamic structure-foundation system
viscous-spring artificial boundary
modal superposition method
precise study
