山脉地形迎风面输电线路风偏响应特性  

Wind-induced swing characteristics of transmission lines on the windward side of mountain terrain

作　　者：刘春城[1] 孙红运 LIU Chun-cheng;SUN Hong-yun(School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012

出　　处：《振动工程学报》2022年第4期1020-1028,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51278091,50978049)。

摘　　要：基于计算流体动力学(CFD)方法,得到了山脉迎风面输电线路横向和竖向平均风速,研究了线路架设位置、杆塔呼称高、山脉坡度三种因素对输电线路风速的影响。建立了跨越山脉的四档输电线路有限元模型,分别利用山地风速和平地风速计算线路风偏响应,得到风偏角增大百分比。同时利用响应面方法建立了三种因素和风偏角增大百分比的二次回归方程。研究表明:当线路越靠近山脊,杆塔呼称高越高,线路风偏越严重。对于架设在山脉总高度3/4以下的线路,设计时可以适当减小设计风速,既保证线路风偏安全性又可提高经济性;架设在山脉总高度3/4以上的线路,应适当增大设计风速,以提高输电线路风偏安全性。Based on the Computational Fluid Dynamics(CFD)method,the lateral and vertical average wind speeds of transmission lines on the windward side of the mountain ranges are obtained,and the effects of three factors,which are the line erection location,tower nominal height,and mountain slope,on the wind speed of transmission lines are studied.The finite element model of the four-span transmission line across the mountain range is established.The wind-induced swing response of the line is calculated using the mountain wind speed and the flat wind speed respectively,and the percentage increase of the wind-induced swing angle is therefore obtained.The quadratic regression equation of the three factors and the percentage increase of wind-induced swing angle are also built by using the response surface method(RSM).The studies show that,with the line closer to the ridge,the towel nominal height will get higher,and the line’s wind-induced swing also becomes more severe.For the lines erected below 3/4 of the total height of the mountains,the wind speed can be appropriately reduced during the design process,which not only ensures the safety of the line’s wind-induced swing,but also improves the economy.As for the lines erected above 3/4 of the total height of the mountains,the designed wind speed should be appropriately increased in order to improve the safety of the wind-induced swing of transmission lines.

关 键 词：风致振动 输电线路 山地风场 风偏响应 响应面方法 

分 类 号：TU312.1[建筑科学—结构工程] TM752.5[电气工程—电力系统及自动化]