摘要
[目的]针对传统避雷针防护效能评估方法难以对其防护概率进行高效评估的现状,基于电气几何模型和引雷空间理论发展一种避雷针防护概率数值评估高效算法,实现避雷针对空间任意点防护概率的高效计算。[方法]首先,根据上下行先导的拦截过程确定避雷针与保护物的引雷空间边界;然后,再由雷击距画出受雷曲面与暴露弧,通过分析受雷曲面和暴露弧的不同特征,量化评估避雷针的引雷风险与接闪效能;最后,综合避雷针引雷与防雷两方面特性建立防护概率的数值评估模型。为检验该方法的准确性,分析避雷针防护概率变化的一般规律,并将结果与已有的分析方法进行对比。[结果]结果表明,该方法的评估结果与经典雷电先导发展模型理论的雷击模拟结果相符。[结论]该方法量化程度高,可以实现避雷针对空间任一点防护概率的高效计算,有助于防雷设计工作。
[Objectives]Aiming at the current situation in which it is difficult to efficiently evaluate protection probability through traditional lightning rod evaluation methods,an efficient numerical evaluation algorithm is developed on the basis of an electrogeometric model(EGM)and attractive volume to realize the efficient calculation of lightning protection probability at any point in space.[Methods]This method first determines the attractive volume boundary of the lightning rod and protection object according to the interception process of the upward and downward leaders.The collection surface and exposure arc of the lightning stroke distance are then calculated,enabling the attractive risk and interception effect of the lightning rod to be quantified.Finally,the attraction and interception characteristics of the lightning rod are integrated to establish a numerical evaluation model of protection probability.To verify the accuracy of this method,the general rule of lightning rod protection probability is analyzed and the results compared with the existing analysis method.[Result]The evaluation results of this method show good agreement with those of classical leader progression model(LPM)theory.[Conclusions]The method proposed herein has a high degree of quantification and can realize the efficient calculation of lightning protection probability at any point in space,which can provide useful references for lightning protection design work.
作者
王帮勇
陆佳骏
祁德
张旭东
曹斌
郭俊
谢彦召
WANG Bangyong;LU Jiajun;QI De;ZHANG Xudong;CAO Bin;GUO Jun;XIE Yanzhao(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Marine Design and Research Institute of China,Shanghai 200011,China)
出处
《中国舰船研究》
CSCD
北大核心
2023年第2期194-203,共10页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51807158)
强脉冲辐射环境模拟与效应国家重点实验室资助项目(SKLIPR1909)。
关键词
避雷针
引雷空间
防护概率
数值评估
lightning rod
attractive volume
protection probability
numerical evaluation
