计算物理 ›› 1992, Vol. 9 ›› Issue (4): 469-472.

• 论文 • 上一篇    下一篇

波动方程的人工边界条件

曹伟1, 陆金甫2   

  1. 1. 郑州工学院数力系, 450002;
    2. 清华大学应用数学系, 100084
  • 收稿日期:1992-03-30 出版日期:1992-12-25 发布日期:1992-12-25
  • 基金资助:
    国家自然科学基金

ARTIFICIAL BOUNDARY CONDITIONS FOR THE WAVE EQUATION

Cao wei1, Lu Jinfu2   

  1. 1. Zhengzhou Institute of Technology, 450002;
    2. Tsinghua University, 100084
  • Received:1992-03-30 Online:1992-12-25 Published:1992-12-25

摘要: 讨论了求解无限区域内波动方程的人工边界条件问题。利用简单而方便的直接差分方法构造了两个新的人工边界条件。严格地证明了它们的稳定性及其与解析边界条件的相容性。数值结果表明,这些新的人工边界条件在计算中颇为有效。

关键词: 波动方程, 差分方法, 人工边界条件, 相容性, 稳定性

Abstract: We consider the problem of constructing artificial boundary conditions for the wave equation. Two new boundary conditions are presented directly by a difference approximation. The stability of these boundary conditions and their consistency with the analytical boundary conditions are proved. Numericl examples indicate that these boundary conditions work effectively.

Key words: wave equation, difference method, artificial boundary condition, consistency, stability