计算物理 ›› 1999, Vol. 16 ›› Issue (5): 449-456.

• 论文 •    下一篇

三维Helmholtz方程外问题的自然积分方程及其数值解

邬吉明, 余德浩   

  1. 中国科学院计算数学与科学工程计算研究所科学与工程计算国家重点实验室, 北京 100080
  • 收稿日期:1998-04-09 修回日期:1999-03-09 出版日期:1999-09-25 发布日期:1999-09-25
  • 作者简介:邬吉明,男,33,博士生,北京2719信箱,100080
  • 基金资助:
    国家自然科学基金资助项目

The natural integral equation of 3-d exterior helmholtz problem and its numerical solution

Wu Jiming, Yu Dehao   

  1. State Key Laboratory of Scientific and Engineering Computing, Institute of Computational Mathematics and Scientific/Engineering Computing, Chinese Academy of Sciences, Beijing 100080
  • Received:1998-04-09 Revised:1999-03-09 Online:1999-09-25 Published:1999-09-25

摘要: 用文[2,3]提出的自然边界归化方法来处理三维Helmholtz方程的外边值问题。在简要介绍如何用球谐展开的方法得到Helmholtz问题在外球域上的自然积分方程后,给出求解该自然积分方程的一种数值方法及相应的数值算例。

关键词: Helmholtz方程, 自然边界归化, 数值方法

Abstract: The natural boundary reduction,suggested by Feng and Yu[2,3],is applied to deal with the exterior boundary value problem of 3-D Helmholtz equation.First,it explains how to derive the natural integral equation,namely the exact Dirichlet-to-Neumann condition,of Helmholtz problem in exterior spherical domain by expansion of spherical harmonics.Second,a numerical method for solving the hypersingular integral equation is developed.Third,some numerical examples are given to illustrate this method.

Key words: Helmholtz equation, the natural boundary reduction, numerical method

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