基于三维多上行先导模型的高建筑物年雷击次数分析  

Analysis of Annual Lightning Strikes of Tall Buildings Based on the Multiple Upward Leaders Three-dimensional Model

作　　者：樊佳乐 谭涌波[1,2] 余骏皓 林雨荷 FAN Jia-le;TAN Yong-bo;YU Jun-hao;LIN Yu-he(School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China;China Meteorological Administration Aerosol-Cloud-Precipitation Key Laboratory,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学大气物理学院,南京210044 [2]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《科学技术与工程》2023年第20期8560-8569,共10页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFC1501504);国家自然科学基金(41875003);灾害天气国家重点实验室开放课题(2019LASW-A03)。

摘　　要：为提高建筑物安全性,更准确评估建筑物雷击风险,利用三维多上行先导模型模拟雷击建筑物,计算出建筑物的年雷击次数。首先,通过改变模型中建筑物高度,闪电始发位置和闪电强度进行大量模拟,计算出闪电从不同位置始发时建筑物的雷击概率;然后,对建筑物上空一定范围内始发闪电进行总体分析,计算出不同高度建筑物的年雷击次数;最后得出一个利用建筑物高度和闪电强度计算的经验公式。结果表明:模拟得出的结果与观测结果相近,相较于《建筑物防雷设计规范》(GB 50057—2010)以及一些利用二维模型得出的经验公式,在一定程度上更精确的计算了建筑物的年雷击次数。In order to improve the safety of buildings and assess the lightning risk of buildings more accurately,the multiple upward leaders three-dimensional model is used to simulate lightning strikes on buildings and calculate the annual lightning strike frequency.Firstly,by varying the building height,lightning initiation location and lightning intensity in the model,a large number of simulations were carried out to calculate the probability of lightning striking a building when the lightning originates from different locations;then,an overall analysis of the lightning initiation within a certain range over the building was carried out to calculate the annual number of lightning strikes for buildings of different heights;finally,an empirical formula was derived using the building height and lightning intensity.The results show that the calculation results are similar to the observed results and compared with the empirical formula in the Design Code for Lightning Protection of Buildings(GB 50057—2010),the annual lightning strike times of buildings can be calculated more accurately to a certain extent.

关 键 词：年雷击次数 数值模拟 雷击概率 高建筑物 多上行先导 

分 类 号：P427.3[天文地球—大气科学及气象学]