计算物理 ›› 2007, Vol. 24 ›› Issue (4): 445-451.

• 论文 • 上一篇    下一篇

MLFMA用于三维电大复杂腔体电磁散射特性的快速计算

罗威, 高正平, 张怀武   

  1. 电子科技大学隐身材料与技术教育部工程研究中心, 四川 成都 610054
  • 收稿日期:2006-04-04 修回日期:2006-10-24 出版日期:2007-07-25 发布日期:2007-07-25
  • 作者简介:罗威(197l-),男,四川达川,博士生,主要从事腔体电磁散射计算和RCS减缩及新材料的研究.

MLFMA in Fast Computation of EM Scattering by a Three-dimensional Electrically Large Complex Cavity

LUO Wei, GAO Zhengping, ZHANG Huaiwu   

  1. Engineering Research Center of Electromagnetic Wave Absorbing Materials, Ministry of Education, University of Electronic Science and Technology, Chengdu 610054, China
  • Received:2006-04-04 Revised:2006-10-24 Online:2007-07-25 Published:2007-07-25

摘要: 基于迭代物理光学法的多层快速多极子算法可高效、快速求解电大腔体的散射特性,给出混合算法的迭代公式.对工程上常见的弯曲较缓慢的S弯腔体,通过合适的分段结构化分组,避免两组之间存在的部分面元遮挡的情况,应用广义互易积分处理带有复杂终端的腔体.数值计算结果表明,所用方法准确并能极大地提高计算速度.

关键词: 迭代物理光学法, 腔体, 多层快速多极子, 广义互易积分

Abstract: An iterative physical optics(IPO) method combined with multilevel fast multipole algorithm(MLFMA) is used to solve electromagnetic scattering by a three-dimensional complex cavity efficiently and rapidly.The iterative formulations of hybrid algorithm are derived.For slow bending cavities in engineering,a proper subsection structured grouping method is provided to avoid the shelter of facets between two groups.A generalized reciprocity integral(GRI) method is applied to cavities with complex termination.The methods obtain accurate results and improve computing speed.

Key words: iterative physical optics, cavity, multilevel fast multipole algorithm, generalized reciprocity integral

中图分类号: