雷击非孤立建筑物危险事件次数的算法研究

发布时间：2018-03-12 23:37

本文选题：年危险事件次数　切入点：雷击大地密度　出处：《电瓷避雷器》2017年05期 　论文类型：期刊论文

【摘要】：雷击建筑物年危险事件次数(ND)主要用于建筑物防雷级别的划分和雷击风险评估。为了更精细化计算ND,通过理论分析,借助Auot CAD采用几何法模拟计算,分别对两栋相临建筑物周边可能存在的三种环境状况进行了计算比对,并针对ND提出了优化计算式。通过分析计算得知:规范中的公式和本文中提出的计算式求得的结果差异显著,采用本文中提出的计算式对ND进行计算,其结果的合理性明显优于规范中的公式,且会对评估的结果产生直接的影响。同时,分析结果显示:在两栋建筑物3 H相互有影响的状况下,当某建筑物周边环境不变时,该建筑物的雷击危险事件的次数随着自身高度的增加而增大;当周边环境改变时,该建筑物的雷击危险事件的次数随着周边建筑的高度的增加而减小。
[Abstract]:The number of annual dangerous events of lightning strike buildings is mainly used in the classification of lightning protection level of buildings and the assessment of lightning strike risk. In order to calculate ND more meticulously, through theoretical analysis and with the aid of Auot CAD, the geometric method is used to simulate the calculation. The three possible environmental conditions around the two adjacent buildings were calculated and compared. Through analysis and calculation, it is known that the formula in the specification and the formula in this paper are very different. The formula proposed in this paper is used to calculate ND. The rationality of the results is obviously superior to the formula in the specification, and it will have a direct impact on the results of the evaluation. At the same time, the analysis results show that: under the condition that the two buildings have interaction with each other, when the surrounding environment of a building remains unchanged, The number of lightning hazard events increases with the increase of the height of the building, and decreases with the increase of the height of the building when the surrounding environment changes.
【作者单位】：湖北省防雷中心;
【基金】：湖北省雷电防御专项课题:基于雷电定位系统的雷暴日反演技术研究(编号:FL-Y-201401)
【分类号】：TU895

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