| PML在FDTD法计算地闪回击辐射场中的应用 |
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| 引用本文： | 李先进,周璧华,付卫东,谷深远,马亻见,陈强.PML在FDTD法计算地闪回击辐射场中的应用[J].解放军理工大学学报,2007,8(3):261-265. |
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| 作者姓名： | 李先进 周璧华 付卫东 谷深远 马亻见 陈强 |
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| 作者单位： | [1]解放军理工大学工程兵工程学院,江苏南京210007 [2]北京市2857信箱,北京100085 |
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| 摘 要： | 为了计算地闪回击电流辐射场,采用时域有限差分(FDTD)法在二维柱坐标系下计算,选用柱坐标系下的完全匹配层(PML)吸收边界条件截断计算域.将计算结果分别与采用一阶Mur吸收边界条件得到的结果和采用Cooray-Rubinstein法得到精确的辐射场进行比较.比较结果表明:PML吸收边界条件的吸收效果优于一阶Mur吸收边界条件;与一阶Mur吸收边界条件相比,在计算结果达到同样精确的条件下,减小了计算域,缩短了计算时间.
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| 关 键 词： | 时域有限差分法 吸收边界条件 回击电流 Cooray-Rubinstein法 FDTD 计算域 回击辐射场 应用 stroke return lightning fields 时间 吸收边界条件 吸收效果 比较结果 完全匹配层 柱坐标系 时域有限差分 地闪回击电流 |
| 文章编号： | 1009-3443（2007）03-0261-05 |
| 修稿时间： | 2007-01-10 |
PML for FDTD calculation of fields generated by lightning return stroke |
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| LI Xian-jin,ZHOU Bi-hu,FU Wei-dong,GU Shen-yuan,MA Jian and CHEN Qiang.PML for FDTD calculation of fields generated by lightning return stroke[J].Journal of PLA University of Science and Technology(Natural Science Edition),2007,8(3):261-265. |
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| Authors: | LI Xian-jin ZHOU Bi-hu FU Wei-dong GU Shen-yuan MA Jian and CHEN Qiang |
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| Institution: | Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;P.O.Box 2857,Beijing 100085,China;Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;P.O.Box 2857,Beijing 100085,China;P.O.Box 2857,Beijing 100085,China;P.O.Box 2857,Beijing 100085,China;P.O.Box 2857,Beijing 100085,China |
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| Abstract: | The finite-difference time-domain(FDTD) method was used in 2-dimensional cylindrical coordinates to calculate the fields radiated by lightning return stroke,and the PML absorbing boundary conditions was adopted to truncate the computational domain.The calculated horizontal electric fields were respectively compared with the results obtained by the use of the first order Mur absorbing boundary conditions and the accurate results obtained by Cooray-Rubinstein formula.The results of the comparison show that the absorbing efficiency of PML absorbing boundary conditions is higher than that of the first order Mur and that PML reduces the computational domain and computation time while getting the same accurate results compared with the first order Mur absorbing boundary conditions. |
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| Keywords: | FDTD(finite difference time domain) method absorbing boundary condition return stroke current Cooray-Rubinstein formula |
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