摘要
建立了空间计算模型,利用MATLAB编程实现了时域有限差分法(FDTD)法对闪电回击空间电磁场的计算和分析。结果发现:随着与闪电回击通道距离的增加,垂直电场的幅值有明显的减弱,波形也有明显的变化,在较远处,波形出现明显形态异常变化,随着高度的增加,垂直电场幅值也变小,波形变缓,但在距离较近的时候表征更为明显;水平电场幅值比同距离下垂直电场小很多,随着高度、距离的增加,电场减弱显著,且曲线形态趋于平缓;径向磁场除了随着距离的增加幅值在减小,不管距离远近,高度的高低,波形变化都不明显。
The spatial calculation model is established,and the finite-difference time-domain(FDTD)method is used to calculate and analyze the space electromagnetic field of lightning return stroke by MATLAB programming.The results show that with the increase of the distance from the lightning return stroke channel,the amplitude of the vertical electric field weakens obviously,and the waveform also has obvious changes;at a distance,the waveform shows obvious abnormal changes;with the increase of height,the amplitude of the vertical electric field becomes smaller and the waveform slows down,but the characterization is more obvious when the distance is closer;the amplitude of the horizontal electric field is much smaller than that of the vertical electric field at the same distance,and the electric field weakens significantly with the increase of height and distance,and the shape of the curve tends to be smooth;except that the amplitude of the radial magnetic field decreases with the increase of distance,regardless of the distance and the height,the waveform change is not obvious.
出处
《科技创新与应用》
2020年第24期4-6,共3页
Technology Innovation and Application
基金
贵州省气象局科研业务项目(黔气科登[2019]08-02号)。
关键词
FDTD
地闪回击
电场分布
波形变化
FDTD
ground lightning return stroke
electric field distribution
waveform change
