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Indirect Lightning Prediction Codes
Technical Paper
2001-01-2893
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Codes have been written that allow designers to predict lightning indirect effects on aircraft wiring and structural elements. As a cost saving alternative to aircraft level testing, the codes will be used to calculate actual transient levels (ATL) on aircraft wiring with the purpose of verifying system lightning protection certification compliance by analysis. The code suite employs a CAD feature to enter the problem geometry. Additional user inputs include electrical characteristics of an airframe, excitation of the airframe with lightning attachments, and computation and display of the electrical response of any electrical member of the airframe versus time. The time series for an electrical response is calculated using inverse Laplace transforms of pole-zero terms fitted to the spectral response of the chosen element. In all cases tested to date, very few pole-zero terms are needed compared to the number of frequency samples required for the equivalent accuracy using standard Fourier techniques. Pole-zero terms are fitted using a specialized least-squares procedure.
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Citation
Nachamkin, J. and Brigante, J., "Indirect Lightning Prediction Codes," SAE Technical Paper 2001-01-2893, 2001, https://doi.org/10.4271/2001-01-2893.Also In
References
- Grover, F. W. Inductance Calculations: Working Formulas and Tables New York Dover 1962
- Fisher, F. A. FILAMENT, A Program For Transient Analysis of Interconnected Wires Presented at 1992 International Convention on Lightning held at Atlantic City, NJ 5–7 October 1992
- Geren, W. P. Melander B. G. Hall D. L. Lightning Distribution Currents Science and Engineering Associates, Inc. Seattle, WA.
- Gottling, J. G. Matrix Analysis of Circuits Using MATLAB Englewood Cliffs, NJ Prentice-Hall 1995
- Stanley, W. D. Transform Circuit Analysis Englewood Cliffs, NJ Prentice-Hall 1989