雷电流数学模型分析

雷电流模型是自然雷电流的数学表达。通过雷电流数学模型可以得到建筑物防雷研究所关心的参量,它是建筑物雷电防护的基础。雷电流频谱分析对确定适合的雷电防护措施,消除或减弱雷电对建筑物弱电系统的破坏作用具有重要意义。选取双指数函数模型和霍德勒函数模型进行对比仿真分析和频谱分析,研究结果表明:霍德勒函数模型与BERGER等人的观测测量结果是一致的;雷电流所含频率丰富,且集中在低频部分。

Analysis of Mathematical Model for Lightning Current

Lightning current model is the mathematical expression of natural lightning current.Parameters concerned in the research on lightning-proof of buildings can be obtained from the mathematical model of lightning current,which is the foundation of lightning-proof of buildings.Wave spectrum analysis of lightning current has vital significance to determine suitable measures for lightning-proof,and to avoid or weaken the lightning damage to buildings’ weak electricity systems.Double exponential function model and Heidler function model are selected to carry out the comparatively simulative and spectral analysis.The result indicates that Heidler function model complies well with the actual observation and measurement results obtained by Berger and his partners;lightning current contains rich wave frequencies that are concentrated in the low frequency part.