四分裂导线上风荷载变化规律研究  

STUDY ON VARIATION LAW OF WIND LOADS ACTING ON FOUR-BUNDLED CONDUCTORS

作　　者：张素侠[1,2] 刘习军[1,2] 李伟[1,2] 

机构地区：[1]天津大学机械工程学院力学系,天津300072 [2]天津市非线性动力学与混沌控制重点实验室,天津300072

出　　处：《工程力学》2013年第6期321-326,共6页Engineering Mechanics

基　　金：国家863项目(2007AA04Z209);国家自然科学基金项目(51009107);天津市自然科学基金重点项目(09JCZDJC26800)

摘　　要：该文采用数值方法,对四分裂导线上风荷载进行了计算,分析了导线相对位置、风速、风向角和直径等因素对导向上的升力系数和拖曳阻力系数的影响。结果表明,当导线上下运动时,导线上的升力和阻力系数呈对称分布,距离越远,阻力系数越大,升力系数越小;导线水平距离变化时,水平距离增大,升力系数减小;当导线发生转动,转角为30°时,升力系数和阻力系数存在一个最小值;随着直径和风速的增大,导线的升力和阻力系数均增大。最后将计算结果与实验结果对比,验证了该文计算结果的可靠性。该研究结果可以为工程应用提供理论参考。Abstract： The variation law of wind loads acting on four-bundled conductors is studied with a numerical method. The factors that affect the lift and drag coefficients, such as the relative position of two conductors, wind speed, wind direction and diameter of conductor, are analyzed. The results show that, when the conductors move in the vertical direction, the lift and drag coefficients are symmetric. The drag coefficient increases and the lift coefficient decrease with the increase of distance between two conductors. There is a minimum value when the rotation angle is 30~. The lift and drag coefficients will increase with the increase of diameter and wind velocity. At last, the comparison of numerical calculation results and the experimental one is carried out, which show that the numerical results in this paper are reliable and will prefer a theoretical reference for pertinent engineering applications.

关 键 词：分裂导线 风荷载 导线参数 数值模拟 舞动 

分 类 号：TU973.213[建筑科学—结构工程]