By constructing the same damping matrix,one special kind of element named equivalent viscous boundary element which can implement the function of viscous boundary is proposed.

ABAQUS was coupled with visco-elastic boundary elements to simulate visco-elastic boundaries.

3-D consistent viscous-spring artificial boundary elements are introduced in the ABAQUS software,the effects of the distance between multi-source loading points and the viscous-spring artificial boundary on the simulation results under train loading conditions are disc.

Equivalent viscous boundary elements and the method of wave input for viscous boundary;

The massless base model and viscous boundary base model are still the most widely applied approximate methods for easiness though many approaches have been proposed for the seismic response analysis of soil-structure system.

The results show that,with the increase of the height of rockfill dam,the influence of viscous boundary become increasingly obvious.

The behavior of the pipe segments far from the fault is substituted by an equivalent boundary proposed by the authors.

A new shell finite element method (FEM) model with an equivalent boundary is presented for estimating the response of a buried pipeline under large fault movement.

Taking the groundwater system of Qiongbei artesian basin as the there-dimension mathematical model and the center of Qiongzhuo Strait as the equivalent boundary,this paper solves the problem of identifying the seabed equivalent boundary for the simulated groundwater resource of the basin.