J4 ›› 2013, Vol. 51 ›› Issue (01): 89-91.

• 数学 • 上一篇    下一篇

解声波散射问题的一种优化PML方法

杨孝英, 王旖旎   

  1. 长春工业大学 基础科学学院, 长春 130012
  • 收稿日期:2012-09-07 出版日期:2013-01-26 发布日期:2013-01-31
  • 通讯作者: 杨孝英 E-mail:yangxiaoying@mail.ccut.edu.cn

An Optimal Perfectly Matched Layer Technique forUniaxial Scattering Problems

YANG Xiaoying, WANG Yini   

  1. School of Basic Science, Changchun University of Technology, Changchun 130012, China
  • Received:2012-09-07 Online:2013-01-26 Published:2013-01-31
  • Contact: YANG Xiaoying E-mail:yangxiaoying@mail.ccut.edu.cn

摘要:

提出一种解声波散射问题的优化完全匹配层(PML)方法, 该方法通过选取一类特殊的吸收函数构造散射问题的PML. 结果表明, 只要适当选取足够小的参数ε0, 计算精度不依赖于PML的厚度δ; 对于给定的厚度δ, 通过选择参数ε0可提高计算精度. 数值计算结果表明了该方法的有效性和准确性.

关键词: 散射问题, 吸收函数, 优化PML方法

Abstract:

We developed an optimal perfectly matched layer (opt PML) technique for solving the time harmonic scattering problems by choosing a particular absorbing function. With this choice, the solution of the optimal PML problem is independent of the thickness of the PML absorbing layer for a  parameter little enough. The accuracy can be improved by choosing proper ε0 for a given δ. Numerical experiments  illustrate the competitive behavior of the proposed optimal method.

Key words: scattering problem, absorbing function, optimal perfectly matched layer method

中图分类号: 

  • O241.3