The characteristics of lightning electromagnetic fields from oblique lightning channel considering the vertical stratified ground

被引：3
|
作者：
Wang X. [1 ]
Chen Y. [1 ]
Wan H. [1 ]
Wang L. [1 ]
机构：
[1] Key Laboratory on Electromagnetic Environment Effects, Ordnance Engineering College, Shijiazhuang
来源：
Chen, Yazhou (chen_yazhou@sina.com) | 1600年 / Science Press卷 / 39期
基金：
中国国家自然科学基金;
关键词：
Finite-Difference Time-Domain (FDTD) method; Layered ground conductivity; Lightning Electromagnetic ElectroMagnetic Pulse (LEMP) fields; Oblique discharge channel; Tilt angle;
D O I：
10.11999/JEIT160326
中图分类号：
学科分类号：
摘要：
The electromagnetic fields from oblique lightning channel are studied by using FDTD and considering the effects of vertical layered ground conductivity and lightning channel tilt angle. The calculation results show that the initial peak values of lightning electromagnetic fields will increase with increasing the channel tilt angle when the observation point is under the oblique lightning channel, and the rising edges of the electromagnetic fields become steeper. The peak time of the lightning electromagnetic fields will be greater with greater distance between the lightning stroke point on the ground and the observation point. For the electromagnetic fields on the ground surface, the ground conductivity at the same side of the observation point affects mainly affects the initial peak values of the horizontal electric field and azimuthal magnetic field; the ground conductivity at the other side affects mainly affects the amplitudes of the wave tail of the horizontal electric field and the azimuthal magnetic field. For the electromagnetic fields inside the ground, the vertical electric field will decrease with increasing the underground depth, but the horizontal electric field and azimuthal magnetic field underground is basically the same as that on the ground surface. © 2017, Science Press. All right reserved.
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收藏
页码：466 / 473
页数：7
相关论文
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