Local absorbing boundaries of elliptical shape for scalar wave propagation in a half-plane

被引：8

作者：

Lee, S

Kallivokas, LF

机构：

[1] Univ Texas, Dept Civil Engn, Austin, TX 78712 USA

[2] Univ Texas, Inst Computat Engn & Sci, Austin, TX 78712 USA

来源：

FINITE ELEMENTS IN ANALYSIS AND DESIGN | 2004年 / 40卷 / 15期

关键词：

absorbing boundary conditions; half-space or half-plane; scalar wave equation; elliptical shape; time-domain; frequency-domain;

D O I：

10.1016/j.finel.2004.02.005

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We have recently discussed the performance of local second-order two-dimensional absorbing boundary conditions of elliptical shape for scattering and radiation problems involving sound-hard obstacles embedded in a full-plane. In this article, using the method of images, we extend the applicability of elliptically shaped truncation boundaries to semi-infinite acoustic media. For problems in either the time- or the frequency-domains, involving, near-surface structures of elongated cross-sections, we show that significant computational savings are attainable when compared against semi-circular truncation geometries. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：2063 / 2084

页数：22

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