%0 Journal Article
%T INFINITE DOMAIN WAVE MOTION ANALYSIS IN RANDOM MEDIA<br>考虑场地介质随机特性的无限域波动分析
%A Liao Songtao Li Jie
%A <br>廖松涛
%A 李杰
%J 力学学报
%D 2003
%I 
%X The random parameter field is discretized into random variables which are expanded in the form of orthogonal polynomials in probability space, and the random differential wave equation is transformed into deterministic linear order-expanded equations. An order-expanded multi-transmitting artificial boundary formula is also derived based on the finite element simulation of wave motion. The combination of the deterministic order-expanded equations and the order-expanded multi-transmitting artificial boundary formula can provide a method to analyze the problem of wave motion analysis in infinite domain with uncertainty in site. Not only is this method free from the secular problem of the corresponding methods which are based on perturbation idea, but also it avoid the numerical instability resulted from the heterogeneity of the ABC elements samples when the Monte Carlo simulation method is used.
%K wave motion
%K random media
%K finite element analysis
%K order-expanded multi-transmitting artificial boundary
%K Monte Carlo simulation<br>无限域波动分析
%K 随机介质
%K 有限元分析
%K 扩阶透射人工边界
%K MonteCarlo模拟
%K 地震
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=E84714C08B1F9DC1&yid=D43C4A19B2EE3C0A&vid=6209D9E8050195F5&iid=0B39A22176CE99FB&sid=FCD27DC5E1F2EEE7&eid=EF27C460877D3C9F&journal_id=0459-1879&journal_name=力学学报&referenced_num=1&reference_num=9