ARTIFICIAL BOUNDARY-CONDITIONS FOR 2D PROBLEMS IN GEOPHYSICS

被引：30
|
作者：
GIVOLI, D [1 ]
VIGDERGAUZ, S [1 ]
机构：
[1] ISRAEL ELECT CORP LTD,DIV RES & DEV,IL-31000 HAIFA,ISRAEL
来源：
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1993年 / 110卷 / 1-2期
关键词：
D O I：
10.1016/0045-7825(93)90021-O
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The numerical solution of a class of two-dimensional problems in geophysics is considered. The earth is modeled as a semi-infinite acoustic or elastic medium. In order to make the computational domain finite, a semi-circular artificial boundary B is introduced, thus truncating the original semi-infinite domain. An exact nonlocal relation is then derived on B. This relation is used as a boundary condition on B, which is combined with the finite element scheme employed in the computational domain. The approach is applied to the Helmholtz equation, modeling time-harmonic acoustic waves, and to problems in elastostatics. Numerical examples validate the method and demonstrate its performance.
引用
收藏
页码：87 / 101
页数：15
相关论文
共 50 条
12345