| 一种采用边界检测的自适应区域分解时域有限差分方法 |
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| 引用本文： | 张华,洪伟,郝张成,崔铁军.一种采用边界检测的自适应区域分解时域有限差分方法[J].应用科学学报,2005,23(5):493-496. |
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| 作者姓名： | 张华 洪伟 郝张成 崔铁军 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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.
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| 关 键 词： | 时域有限差分法 自适应边界检测 区域分解 |
| 文章编号： | 0255-8297（2005）05-0493-04 |
| 收稿时间： | 2004-06-09 |
| 修稿时间： | 2004-06-092004-09-06 |
An Adaptive Domain Decomposition FDTD Method Using Boundary Detection |
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| ZHANG Hua,HONG Wei,HAO Zhang-cheng,CUI Tei-jun.An Adaptive Domain Decomposition FDTD Method Using Boundary Detection[J].Journal of Applied Sciences,2005,23(5):493-496. |
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| Authors: | ZHANG Hua HONG Wei HAO Zhang-cheng CUI Tei-jun |
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| Institution: | State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China |
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| 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. |
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| Keywords: | adaptive boundary testing domain decomposition finite-difference time-domain |
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