Comparative analysis of seismic reference wave field selection methods based on viscoelastic artificial boundary
Artificial boundaries are introduced to simulate the infinite domain in the analysis of soil-structure dynamic interaction,and the viscoelastic artificial boundary is one of the commonly used artificial boundaries.When the artificial boundary is used,the selection of the reference wave field as the input of seismic wave is very important,different reference wave field selection methods will lead to great differences in calculation accuracy.In this paper,four kinds of two-dimensional site models,including homogeneous half space,layered site,depressed terrain and underground structure are assumed.Then ANSYS finite element software and viscoelastic artificial boundary are used to simulate the above four site models considering SV wave vertical incidence and 30° oblique incidence.The calculation accuracy of three different reference wave fields is compared in detail.The results show that when the free wave field is selected as the reference wave field for all artificial boundaries of the soil-structure dynamic interaction calculation model,the accuracy of the calculation results is the highest.
NETL
NSTL
万方数据
维普
