框架—核心筒结构超高层建筑物雷击瞬态磁场分布特性仿真研究  

Simulation Study of the Transient Magnetic Field Distribution of the Frame-core Tube Structure of Super-tall Buildings in a Lightning Strike

作　　者：朱泽伟[1] 周歧斌 陈华晖[1] 赵洋[3] 范娟[1] ZHU Zewei;ZHOU Qibin;CHENG Huahui;ZHAO Yang;FAN Juan(Shanghai Lightning Protection Center,Shanghai 201615,China;School of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]上海市防雷中心,上海201615 [2]上海电力学院电气工程学院,上海200090 [3]南京信息工程大学,南京210044

出　　处：《高压电器》2019年第12期61-67,共7页High Voltage Apparatus

基　　金：上海市气象局面上课题(MS201602);上海市教育发展基金会和上海市教育委员会“曙光计划”资助(15SG50)~~

摘　　要：为研究地闪特征条件下超高层建筑物雷击效应,按真实建筑物尺寸等比例构建典型框架-核心筒式建筑物模型,将实际探测雷电流特征注入大概率雷击附着点位置并开展电流传输和空间磁场分布仿真分析。研究总结了建筑物金属框架不同位置的雷击附着点特征、电流传输时域变化特征、不同空间位置的磁场定性及定量变化特征。仿真结果表明:模拟雷电流波形特征决定磁场强度在10~50μs逐渐达到峰值,随后至200μs逐渐减弱;从电流变化趋势发现竖直结构柱散流效果较水平位置更为明显;定性分析女儿墙及高层水平框架相比稍低层框架雷电流强度及磁场变化较为剧烈;定量分析相同高度空间磁场靠近外部框架位置相比内部场强更强,中间楼层核心筒内磁场强度符合计算机房布设要求。仿真结果为直击雷防护设计以及雷击电磁脉冲防护提供参考。In order to study the high-rise buildings effect under the condition of the effect of the lightning strike,high-rise buildings,this study create the typical high-rise buildings according to the size of real buildings building model,then the actual detected lightning current inject at the high probability location,so current transmission and space magnetic field distribution simulation can be analyzed.The study summarizes the characteristics of lightning attachment point characteristics of different positions in building metal frame,the characteristics changes of current transmission in time domain,and the qualitative and quantitative changes of the magnetic field in different space positions.The simulation results show that the magnetic intensity of the wave waveform reaches its peak at 10~50 μs,and then decreases gradually to 200 μs.It is found that the current variation trend on vertical structure column are more obvious then the horizontal position which is mainly by the dispersion of flow effect.Qualitative analysis shows that the parapet wall and the high-level frame have the acute intensity of the magnetic field,quantitative analysis also proves the space intensity of magnetic field near the external frame is stronger than the internal field at same height,and the magnetic strength of the inner core is consistent with the requirement of specification for computation center field.The simulation results provide reference for lightning protection design and lightning protection.

关 键 词：雷击 框架-核心筒结构 仿真 金属框架 雷电流 

分 类 号：TU7[建筑科学—建筑技术科学]