斜拉索桥梁雷电脉冲磁场分布研究  

Lightning-induced magnetic field distribution on stayed-cable bridge

作　　者：周雪君 蔡彬峰 边晓燕[3] 

机构地区：[1]台州市防雷中心,台州318000 [2]浙江省交通规划设计研究院,杭州310006 [3]上海电力学院,上海200090

出　　处：《电波科学学报》2015年第5期980-986,共7页Chinese Journal of Radio Science

基　　金：浙江省交通运输厅科技项目(No.2012H34);国家自然科学基金(No.51007054)

摘　　要：为避免高塔大跨径桥梁上电子设备遭受雷电电磁脉冲(Lightning Electromagnetic Pulse,LEMP)的损害,需要研究桥梁的雷电脉冲磁场分布.首次将用于楼宇建筑物LEMP分析的"等效电路法"应用到斜拉索桥梁的雷电脉冲磁场仿真计算和分析,特别针对斜拉索导体提出了折线拟合的建模方法,从而将斜拉索桥梁的金属框架结构转换成等效电路模型.并以在建的台州湾大桥为案例,计算和分析了台州湾大桥的雷电脉冲磁场分布,提出了桥梁上敏感电子设备的雷电脉冲磁场的防护建议.In order to minimize the lightning electromagnetic pulse hazard to electronic equipment installed on stayed-cable bridges,it is necessary to study the lightninginduced magnetic field on the bridges.The＂equivalent electrical-circuit method＂for the lightning electromagnetic pulse analysis of buildings is applied to the study of lightninginduced magnetic field of stayed-cable bridges.Especially,the stayed-cables of the bridge are transferred as cascade polylines to make the internal metallic structure of the bridge into an equivalent electrical-circuit network.Finally,take the Taizhouwan Bridge under construction for example,the distribution of lightning-induced magnetic field on the bridge is calculated and analyzed with the method proposed in this paper.Then the advice for the protection of sensitive electronic equipment against lightning-induced magnetic field is provided.

关 键 词：雷电电磁脉冲 斜拉索桥梁 折线拟合 金属框架结构 等效电路法 雷电防护算法 

分 类 号：TM153[电气工程—电工理论与新技术]