地面建筑物(群)对地闪回击电磁环境的影响  

Environmental building effects on electromagnetic field of lightning stroke

作　　者：黄钰 吴安坤 张淑霞 李丽丽 Huang Yu;Wu Ankun;Zhang Shuxia;Li Lili(Meteorological Disaster Defense Technology Center of GuiZhou Province, Guizhou 550000, China;Key Laboratory for Cloud Physics of China Meteorological Administration, Beijing 100000, China;Guizhou Hail Prevention and Control Technology Engineering Center, China;Guizhou Key Laboratory of Mountainous Climate and Resource, Guiyang 550002, China)

机构地区：[1]贵州省气象灾害防御技术中心,贵阳550000 [2]中国气象局云雾物理环境重点实验室,北京100000 [3]贵州省冰雹防控技术工程中心,贵阳550000 [4]贵州省山地气候与资源重点实验室,贵阳550000

出　　处：《国外电子测量技术》2018年第5期73-77,共5页Foreign Electronic Measurement Technology

基　　金：中国气象局云雾物理环境重点实验室开放课题(2017Z01603)资助项目

摘　　要：为了研究地闪回击电磁辐射受周边建筑的影响,进而提高闪电探测效率,建立建筑、闪电通道空间一体化计算模型,基于TL雷电回击电流模式,采用时域有限差分法对单建筑和多建筑的情况进行数值计算。结果显示：对有无环境建筑存在磁场的变化不明显,而电场的变化十分显著;建筑的存在对建筑前后电场存在一定削弱作用,尤其是多建筑时,处于中间区域的电场减少的更为显著;无论单建筑还是多建筑建筑顶端的电场明显增大,并且当建筑高度一定时该增大比例在一个较为稳定的区间。In order to study the influence of surrounding buildings on electromagnetic radiation of lightning flash,and thus improve the efficiency of lightning detection,established the integration space calculation model of buildings and lightning channel,based on the TL lightning counter current mode,using the finite difference time domain method made the numerical calculation of single and multiple buildings.Results showed that,the magnetic field has no obvious change to buildings exit or not,but the electric field changes remarkably;the electric field before or behind the building were decreased because of existence of the building,the electric field in the middle area reduced more significantly when there are multiple buildings;the electric field at the top of the building was increased obviously,no matter single building or multiple buildings,and the proportion was in a stable range when the building height at a certain value.

关 键 词：环境建筑 时域有限差分法 雷击电磁脉冲 闪电回击模型 

分 类 号：TN8[电子电信—信息与通信工程]