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水力发电学报 ›› 2019, Vol. 38 ›› Issue (9): 1-17.doi: 10.11660/slfdxb.20190901

• •    下一篇

特约论文:土−结构动力相互作用远场问题数值分析方法综述

  

  • 出版日期:2019-09-25 发布日期:2019-09-25

A review of numerical methods for far-field modeling in dynamic soil-structure interaction systems

  • Online:2019-09-25 Published:2019-09-25

摘要: 土-结构动力相互作用(dynamic soil-structure interaction,DSSI)是结构动力分析中重要的研究分支。随着计算机技术和数值技术的发展,数值方法得到越来越广泛的应用。在采用数值方法解决土?结构动力相互作用问题时,常通过直接法或子结构法将开放的无限域体系转化成封闭的有限区域,并引入适当的人工边界来模拟无限土域对近场研究对象的影响。对近场的研究可涉及非线性问题,而远场问题的难点包括满足无穷远处的辐射条件和外源的动力输入。针对不同的问题,适用的数值方法不尽相同。本文就土?结构动力相互作用远场问题中作者认为常用的数值方法进行归纳总结。

关键词: 土-结构动力相互作用, 远场无限域, 人工边界, 数值模拟

Abstract: Dynamic Soil-Structure Interaction (DSSI) problem is one of the most important issues in the dynamic analysis of structures. Numerical simulations are widely applied to the study of DSSI effects owing to the rapid progress in computational power and numerical schemes. In a numerical method, DSSI system is portioned into a finite domain surrounding the structures (near field) and an infinite region (far field) by either direct method or substructure method. The modeling of the near field may consider nonlinear behaviors, while the modelling of the far field must satisfy the radiation condition at infinity and allows the input from an external source in some occasions. In this paper, various numerical methods that are, in the authors’ opinion, commonly used in the DSSI analysis are reviewed.

Key words: Dynamic soil-structure interaction, Far field unbounded domain, Artificial boundary, Numerical methods

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