摘要
针对场地介质具有随机特性的无限域地震波动分析问题,本文将随机结构正交展开理论与波动有限元散射问题的模拟技术相结合,形成了求解无限域含随机介质场地地震反应分析的波动有限元分析方法。该方法成功的避免了基于摄动思想各类方法的久期项的干扰,其正确性由Monte Carlo模拟得到验证。文章同时讨论了场地随机介质在地震作用下的反应特点及介质的随机性对场地反应量的影响。
In reference to infinite field seismic wave random features, the orthogonal expansion method of the analysis of the site media with random mechanism was combined with simulation technology of finite element scattering problem, therefore the wave finite element analysis method for solving the seismic response analysis with random media in infinite field was formed. This method was free from the secular problem of the corresponding methods which were based on perturbation idea, its correctness was proved by Monte Carlo simulation. At the same time, the reaction characteristics of the site random media under seismic action and the influence of media randomness on ground motion were also discussed.
出处
《工程建设》
2006年第4期5-10,共6页
Engineering Construction
关键词
波动有限元分析
散射问题
扩阶方程
扩阶透射人工边界
MONTE
CARLO模拟
finite element analysis of wave motion, scattering problem, order-expanded equation, order-expanded multi-transmitting artificial boundary, Monte Carlo simulation
