An explicit finite element method for dynamic analysis in three-medium coupling system and its application  

作　　者：赵成刚 李伟华 王进廷 李亮 

机构地区：[1]School of Civil Engineering & Architecture,Northern Jiao-tong University,Beijing 100044,China [2]School of Civil Engineering & Hydropower Engineering,Tsing Hua University,Beijing 100084,China [3]School of Civil Engineering & Architecture,Northern Jiao-tong Universiyt,Beijing 100044,China

出　　处：《Acta Seismologica Sinica(English Edition)》2003年第3期272-282,共11页

基　　金：National Natural Scienccs Foundation of China (50178005).

摘　　要：In this paper, an explicit finite element method to analyze the dynamic responses of three-medium coupled systems with any terrain is developed on the basis of the numerical simulation of the continuous conditions on the bounda-ries among fluid saturated porous medium, elastic single-phase medium and ideal fluid medium. This method is a very effective one with the characteristic of high calculating speed and small memory needed because the formulae for this explicit finite element method have the characteristic of decoupling, and which does not need to solve sys-tem of linear equations. The method is applied to analyze the dynamic response of a reservoir with considering the dynamic interactions among water, dam, sediment and basement rock. The vertical displacement at the top point of the dam is calculated and some conclusions are given.In this paper, an explicit finite element method to analyze the dynamic responses of three-medium coupled systems with any terrain is developed on the basis of the numerical simulation of the continuous conditions on the bounda-ries among fluid saturated porous medium, elastic single-phase medium and ideal fluid medium. This method is a very effective one with the characteristic of high calculating speed and small memory needed because the formulae for this explicit finite element method have the characteristic of decoupling, and which does not need to solve sys-tem of linear equations. The method is applied to analyze the dynamic response of a reservoir with considering the dynamic interactions among water, dam, sediment and basement rock. The vertical displacement at the top point of the dam is calculated and some conclusions are given.

关 键 词：fluid saturated porous medium-elastic single-phase medium-ideal fluid medium coupled system dynamic response analysis explicit finite element method 

分 类 号：TV223[水利工程—水工结构工程]