湍流下八分裂输电线路舞动分析  

Galloping analysis of 8-bundle transmission lines in turbulence

作　　者：李清 李梦丽 杨晓辉 黄珏 Li Qing;Li Mengli;Yang Xiaohui;Huang Jue(State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China;School of Civil Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]国家电网河南省电力公司电力科学研究院,郑州450052 [2]重庆大学土木工程学院,重庆400044

出　　处：《建筑结构》2019年第22期108-112,122,共6页Building Structure

摘　　要：基于河南尖山地区的原型线路,采用刚性模型的风洞气动力试验数据,根据规范要求模拟了湍流风场,进行了八分裂导线在均匀流与湍流下的舞动分析。结果表明,对于Den Hartog机理激发的舞动,湍流对水平幅值的影响较竖向幅值大,还会扩大输电线路舞动的风速区间,使得舞动的临界风速变低,更容易发生舞动。对于Nigol机理激发的舞动,湍流减小了竖向和扭转角的舞动振幅。Based on the prototype transmission line of the Jianshan mountain area of Henan province,the wind tunnel test data of rigid model were used to simulate the turbulent wind field according to the specification requirements.The galloping analysis of 8-bundle conductors under uniform flow and turbulence was carried out.The results show that for the galloping stimulated by Den Hartog mechanism,turbulence has a greater influence on the horizontal amplitude than on the vertical amplitude.It also enlarges the wind speed range of transmission line galloping,making the critical wind speed of galloping lower and more prone to galloping.For Nigol mechanism-induced galloping,turbulence reduces the vertical and torsional angular galloping amplitudes.

关 键 词：湍流 八分裂导线 气动力参数 舞动模型 

分 类 号：TU317.2[建筑科学—结构工程] TM751[电气工程—电力系统及自动化]