LEMP 空间表达式求解及分布规律研究

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。

Calculation of LEMP's Spatial Expression and Research on Distribution Laws

The analytical expression of electromagnetic field which is generated by vertical and oblique channel is obtained by solving the Maxwell's equations. The spatial distribution laws of lightning electromagnetic field is analyzed base on analytical expressions. The results show that in model of vertical and oblique channel the impact of vertical electric and magnetic fields by observation height will decrease with the increasing of the horizontal distance. The peak value of horizontal electric field will increase with the increasing of observation point height in vertical channel model. But for horizontal electric field, the peak value will increase with the increasing of observation point height in vertical channel model, while in model of oblique channel when observation point is below discharge channel, the peak value will increase with the increasing of observation point height, when the observation point is above the discharge channel, the peak value will decrease with the increasing of observation point height.