Probability of lightning strikes to air-terminations of structures using the electro-geometrical model theory and the statistics of lightning current parameters
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- 作者：Alex ; er Kern ; Christof Schelthoff ; Moritz Mathieu
- 关键词：Lightning strike ; Air-termination ; Striking probability ; Electro-geometrical model ; Lightning current statistics ; Numerical model
- 刊名：Atmospheric Research
- 出版年：2012
- 出版时间：1 November, 2012
- 年：2012
- 卷：117
- 期：Complete
- 页码：2-11
- 全文大小：1225 K
文摘
In planning air-terminations for a structure to be protected the use of the rolling-sphere method (electro-geometrical model) is the best way from the physics of lightning point-of-view. Therefore, international standards prefer this method. However, using the rolling-sphere method only results in possible point-of-strikes on a structure without giving information about the probability of strikes at the individual points compared to others. Extending the electro-geometrical model using the probability distributions of natural lightning parameters, and implementing this idea into a numerical simulation computer code give the possibility to show the different exposure of individual points of a structure to direct lightning strikes and with that the different ¡°efficiency¡± of air-terminations at these points. The results of the method described may help in the future, to optimize the planning of air-terminations due to their lightning strike capturing efficiency.