摘要
为了探讨地闪回击辐射场沿有限电导率σ地表面的传播特性,用表面波理论,结合地闪回击过程的推迟势效应,分析讨论了时域和频域地闪回击辐射场沿不同σ地表面的传播特性(如湿地、干地、湖泊和沙漠)。结果表明,远距离地表面附近的辐射场主要是表面波,表面波强度与距离的平方成反比。地面σ对地闪回击辐射场传输存在较大的影响,σ越小,影响越大,回击辐射场沿不同σ地表面的传播并不是按照距离反比关系衰减。
In order to investigate the influences of the path of propagation on the amplitude of the electric fields generated by lightning return stroke, based on the lateral-wave theory and the retardation effects, the propagation effects on the lightning-generated electric field along the imperfectly conducting earth such as wet and dry earth, lake water and dry sand are calculated. It is shown that the field on the earth＇s surface is determined primarily by the lateral surface wave with an inverse distance square relationship since the space vanishes there. The radiation field along the surface of low conducting ground is significantly affected by popagation, the far field incident on the earth boundary in time domain and frequent domain does not decrease inversely with increasing distance over a wide range of media.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第10期2036-2040,共5页
High Voltage Engineering
基金
江苏省气象灾害重点实验室(南京信息工程大学)项目(KLME050101)~~
关键词
有限电导率
辐射场
表面波
回击
电场
影响
finitely conducting earth
radiation field
lateral surface wave
return stroke
electric field
effect
