Numerical Calculation of the Spectrum of the Severe (1%) Lighting Current and Its First Derivative

Brown, C G ; Ong, M M ; Perkins, M P ; Speer, R D

Lawrence Livermore National Laboratory

关键词: Wave Forms;    42 Engineering;    Lightning;    Spectra;   

DOI  :  10.2172/991820
RP-ID  :  LLNL-TR-423690
RP-ID  :  W-7405-ENG-48
RP-ID  :  991820

美国|英语

来源: UNT Digital Library

【 摘 要 】

Recently, the direct-strike lighting environment for the stockpile-to-target sequence was updated [1]. In [1], the severe (1%) lightning current waveforms for first and subsequent return strokes are defined based on Heidler's waveform. This report presents numerical calculations of the spectra of those 1% lightning current waveforms and their first derivatives. First, the 1% lightning current models are repeated here for convenience. Then, the numerical method for calculating the spectra is presented and tested. The test uses a double-exponential waveform and its first derivative, which we fit to the previous 1% direct-strike lighting environment from [2]. Finally, the resulting spectra are given and are compared with those of the double-exponential waveform and its first derivative.