Influence of Branch Geometry on Radiation Field Characteristics From Lightning Return Strokes in the Time Domain

摘要：

Due to the disappearance of the geometric symmetry produced by the branches of the lightning channel, the characteristic of the radiation field is analyzed in 3-D rectangular coordinates using the FDTD method.Generalized perfectly matched layer (GMPL) is adopted in the underground to calculate absorbing boundary region with the finite conductivity of the ground. The results show that the effect of branch is to introduce fine structure into the time-domain radiation field waveform and consequently to increase the higher-frequency content.Furthermore the relationship between the fractal dimension and space orientation and relative position from the main channel and the generated EM fields in the time domain is also discussed in detail.

关键词： FDTD branch geometry GMPL lightning return stroke

作者: Guo Fei Zhou Bihua

作者单位: Engineering Institute of Crops of Engineers,PLA Univ.of Sci.&Teeh.,Nanjing 210007,China

会议类型: 国际会议

会议名称: Asia-Pacific Conference on Environmental Electromagnetics CEEM2009(第五届亚太环境电磁学学术会议)

会议地点: 西安

会议语种:英文

页码: 101-104

在线出版日期: 2009-09-16（万方平台首次上网日期，不代表论文的发表时间）