计算物理 ›› 2008, Vol. 25 ›› Issue (3): 301-308.

• 研究论文 • 上一篇    下一篇

求解洞穴散射问题的带有吸收边界层的有限元方法

张德悦, 马富明, 方明   

  1. 吉林大学数学科学学院, 吉林 长春 130012
  • 收稿日期:2006-11-08 修回日期:2007-07-11 出版日期:2008-05-25 发布日期:2008-05-25
  • 作者简介:Zhang Deyue(1975-),male,Jilin,associate,PhD,major in numerical computing.
  • 基金资助:
    supported by NSFC(10431030,10726050)

Finite Element Method with Perfectly Matched Absorbing Layers for Wave Scattering from a Cavity

ZHANG Deyue, MA Fuming, FANG Ming   

  1. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2006-11-08 Revised:2007-07-11 Online:2008-05-25 Published:2008-05-25
  • Supported by:
    supported by NSFC(10431030,10726050)

摘要: 给出二维洞穴散射问题的带有吸收边界层的有限元方法.通过吸收边界层将无界域问题截断,得到一个有界域问题,求解此有界域问题来代替原问题.进一步分析收敛性并进行数值模拟.结果表明了此方法的有效性.

关键词: 洞穴, 吸收边界层, 有限元方法

Abstract: A finite element method with perfectly matched layers(PML) is developed for wave scattering from a two-dimensional cavity embedded in an infinite ground plane. Based on a variational formulation it uses the PML technique to truncate an unbounded computational domain to a bounded one. Hence, a PML problem instead of the original scattering problem is solved. Convergence of the PML problem to the scattering problem is analyzed. Numerical experiments illustrate competitive behavior of the proposed method.

Key words: cavity, perfectly matched layers, finite element method

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