双支避雷针保护任意空间点的计算方法

摘要

For lacking an accurate method of protection range calculation for the rolling sphere method in the lighting protection standards, a simple calculation method is presented, which is more precise, and easier and more convenient to use, better than the graphing method. A thorough analysis is made of the judgment of the protection range of the double lightning rods for any point from the aspects of both the influence scope of a single lightning rod and the co-action scope of the double-rod lightning protection. The method is devised through analyzing the judgmcnt methods of protection range of two lightning arresters on buildings by means of both distance comparison and angle comparison methods. The calculation method can be applied easily in lighting protection service.%针对《建筑物防雷设计规范》规定中缺乏滚球法保护范围精确计算方法的问题,分别从单支避雷针作用部分及双支避雷针共同作用部分两个方面对双支避雷针保护任意空间点的判定作了深入的分析,得出了相对比较简单的计算方法,从而可以将规范使用的作图判定法改进为数值计算判定法,使结果更加精确.同时用距离比较法和角度比较法两种方法分析了建筑物上任意两接闪器所确定断面上保护范围的判定方法,得出了简便易行的计算方法.这些计算方法可供专业的防雷技术工作者借鉴并推广应用于防雷技术工作中.