论文部分内容阅读
利用偶极子理论对Maxwell方程组进行了求解,得到了垂直通道与斜向通道模型的雷电电磁场解析表达式。基于此表达式分析了不同高度处雷电电磁场的空间分布规律。研究结果表明,在垂直通道与斜向通道模型中,垂直电场和磁场受观测点高度的影响随水平距离的增加而减小,但是对水平电场而言,在垂直通道模型中其初始峰值随着观测点高度增加而增加,在斜向通道模型中,当观测点在通道下方时电场峰值随着观测点高度的增加而增加,当观测点在通道上方时高度越高电场峰值越小。
The Maxwell equations are solved by using the dipole theory, and the analytic expressions of lightning electromagnetic fields in vertical and oblique channel models are obtained. Based on this expression, the spatial distribution of lightning electromagnetic field at different heights is analyzed. The results show that in the vertical and oblique channel models, the vertical electric field and the magnetic field are affected by the height of the observation point with the increase of the horizontal distance, but for the horizontal electric field, the initial peak value of the vertical channel model In the oblique channel model, the peak value of the electric field increases with the height of the observation point when the observation point is below the channel. When the observation point is above the channel, the height of the electric field decreases with the height of the observation point increasing.