粗糙表面对雷电水平电场影响的模拟研究  

Propagation effects of the rough surface on the lightning horizontal electric field

作　　者：高金阁[1,2] 张其林[1,2] 李东帅[1,2] 张源源[1,2] 樊艳峰[1,2] 

机构地区：[1]中国气象局大气物理与大气环境重点开放实验室,南京210044 [2]南京信息工程大学大气物理学院,南京210044

出　　处：《气象科学》2013年第6期627-633,共7页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(40975002);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：利用分形方法模拟了粗糙陆地表面和海陆交接复杂表面,并通过Barrick提出的等效表面阻抗法和Cooray-Rubinstein(C-R)近似算法,计算了不同粗糙表面情况下的雷电水平电场。进而分析了粗糙陆地表面和海陆交接复杂表面对水平电场产生的影响。结果表明:当雷电水平电场沿粗糙陆地表面传播时,陆地表面的粗糙程度对电场影响很大,且随着粗糙度的增加,雷电水平电场的初始峰值会逐渐减小;当水平电场沿海陆交接复杂表面传播时,陆地的粗糙度对水平电场影响较大,而海浪起伏程度对电场影响较小。Using the fractal method to simulate the rough land surface and sea-land mixed surface and Barrick effective surface impedance and Cooray-Rubinstein（C-R） formula, this paper calculates the lightning＇s horizontal electric field under different rough surface and finally analyzes the effect of the rough land surface and sea-land mixed surface on the lightning＇s horizontal electric field. The results show that the effect of the roughness on the horizontal electric field is obvious; the initial negative excursion decrea- ses with the increase of the roughness. The horizontal electric field is affected more by the rough land than by the ocean surface when the field propagates from the ocean to the land section.

关 键 词：雷电水平电场 粗糙表面 等效表面阻抗 衰减函数 

分 类 号：TM863[电气工程—高电压与绝缘技术]