English

应用科学学报 ›› 2005, Vol. 23 ›› Issue (5): 493-496.

• 论文 • 上一篇    下一篇

一种采用边界检测的自适应区域分解时域有限差分方法

张华, 洪伟, 郝张成, 崔铁军   

  1. 东南大学无线电工程系毫米波国家重点实验室, 江苏南京 210096
  • 收稿日期:2004-06-09 修回日期:2004-09-06 出版日期:2005-09-30 发布日期:2005-09-30
  • 作者简介:张华(1974-),男,重庆人,博士生,E-mail:huazhang@emfield.org;洪伟(1962-),男,河北张家口人,教授,博导,E-mail:weihong@emfield.org;崔铁军(1965-),男,河北承德人,教授,博导,E-mail:tjcui@emfield.org
  • 基金资助:
    国家"863"高技术研究发展计划(2002AA123031);国家杰出青年科学基金(60225001);海外青年合作研究基金资助项目(60028101)

An Adaptive Domain Decomposition FDTD Method Using Boundary Detection

ZHANG Hua, HONG Wei, HAO Zhang-cheng, CUI Tei-jun   

  1. State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China
  • Received:2004-06-09 Revised:2004-09-06 Online:2005-09-30 Published:2005-09-30

PDF

75

被引次数

4

摘要： 提出了一种采用边界检测的自适应区域分解时域有限差分(FDTD)方法:将待解问题分解为若干独立的子区域;在各个子区域之间通过连接边界条件,进行自适应检测;当检测到波传播至检测边界上时,相应子区域被激活,并进行传统的FDTD迭代计算,否则,该子区域将不参与场值迭代.通过这样一种边界检测信息传递方案,把各个子区域联系起来,获得原问题的解.实际仿真结果表明,这种方法在解决复杂问题和加快计算时间方面是有效的.

关键词: 时域有限差分法, 自适应边界检测, 区域分解

Abstract: An extension of the classical FDTD, adaptive domain-decomposition FDTD (ADD-FDTD) using a boundary detection method, is proposed to solve multiple sub-region problems.In ADD-FDTD, the problem domain is divided into several independent FDTD sub-regions.A boundary condition is applied to boundaries between sub-regions with adaptive detection.In each sub-region, FDTD iteration is activated only if the propagated wave reaches its boundary, otherwise no calculation is performed.Simulation results show that ADD-FDTD is efficient in both computational complexity and computational time.

Key words: domain decomposition, adaptive boundary testing, finite-difference time-domain

中图分类号: