Estimation of the lightning strike incidence of free-standing masts |
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| Institution: | 1. Curriculum for the Environment and Ecology, University of North Carolina at Chapel Hill, Venable Hall, Campus Box #3275, Chapel Hill, NC 27599-3275, United States;2. Department of City and Regional Planning, University of North Carolina at Chapel Hill, New East Building, Campus Box #3140, Chapel Hill, NC 27599-3140, United States;1. College of Electrical and Information Engineering, Hunan University, Changsha, 410082, China;2. School of Automation, Guangdong University of Technology, Guangzhou, 510006, China;1. Urban Planning Department, School of Architecture, Design and Planning, University of Kansas, United States;2. Department of City and Regional Planning and Center for Sustainable Community Design, Institute for the Environment, The University of North Carolina at Chapel Hill, United States;3. Department of City and Regional Planning and Department of Homeland Security Coastal Hazards Center of Excellence, The University of North Carolina at Chapel Hill, United States;1. Laboratory of Research in Industrial Prevention (LRPI), Algeria;2. Institute of Health and Industrial Safety, University of Batna, Algeria |
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| Abstract: | An efficient method is proposed in this paper for estimating the lightning strike incidence of free-standing masts. In the proposed method, the attractive volume is defined to describe the lightning attraction characteristic of the mast. Its border is determined from the interception condition of the upward leader to the downward leader. Introducing the modified formula allows the mast height dependency to be included in the evaluation of the striking distance. An integral is performed on the attractive surface to obtain the equivalent exposure area of the mast, with the stochastic distribution of approach angle of the downward leader taken into account. Then, the annual strike incidence is calculated for various mast heights. To confirm the validity of the proposed method, a comparison is made between calculated results and empirical formulas. |
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