Boundary absorbing computations in wave simulation with the finite element method

Author

Zhang, Wensheng

Author_Institution

Inst. of Comput. Math. & Sci./Eng. Comput., Chinese Acad. of Sci., Beijing, China

fYear

2011

fDate

15-17 July 2011

Firstpage

1086

Lastpage

1089

Abstract

The simulation of wave propagation has important applications in many problems such as in computational seismology. Here, we focus on boundary absorbing computations in wave simulation with the finite element method on triangular mesh. The first-order and second-order absorbing boundary conditions based on wave decomposition are presented. Moreover, the absorbing conditions for corners are proposed. The weak formulations combined with absorbing conditions are derived. Numerical computations for a complex model show that boundary reflections are eliminated and the computational efficiency is high by using the mass-lumping technique.

Keywords

finite element analysis; seismic waves; wave equations; wave propagation; absorbing boundary conditions; boundary absorbing computations; complex model; computational efficiency; computational seismology; finite element method; mass-lumping technique; numerical computations; triangular mesh; wave decomposition; wave equation; wave propagation simulation; Boundary conditions; Computational modeling; Finite difference methods; Finite element methods; Mathematical model; Numerical models; Propagation; Wave equation; absorbing boundary conditions; finite element method; mass-lumping; wave propagation;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechanic Automation and Control Engineering (MACE), 2011 Second International Conference on

Conference_Location

Hohhot

Print_ISBN

978-1-4244-9436-1

Type

conf

DOI

10.1109/MACE.2011.5987123

Filename

5987123