新月形覆冰单导线气动耦合特性分析
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中图分类号：TM752 文献标志码：A 文章编号：1000-582X（2025）10-045-11
Analysis of aerodynamic coupling characteristics of crescent-shaped iced single conductor
LIU Yuantao， ZHAO Shanpeng， TIAN Mingxing （School ofAutomatic &Electrical Engineering，Lanzhou Jiaotong University，Lanzhou 73007o，P.R.China）
Abstract：To clarify the impact of aerodynamiccoupling characteristics onthe galloping amplitudeof crescentshaped iced single conductor，an analysis model of wind-induced vibration response of the conductor is established based on aerodynamic theory.The fluid-structure coupling method isused to calculate the displacement time history of the conductor，and the influence of aerodynamic coupling characteristics on its gallping amplitude is analyzed.The results show that the frequency ratio and the degree offreedom have little influence on the aerodynamic lift-drag coefficient of the conductor， which shows that the aerodynamic force on theconductor in the flow field does not change with thedifferent degreesoffreedomand frequencyratio.In different degrees of freedom systems，the conductor gallops greatly at the angle of attack of 20∘ . In the vertical single-degree-of-freedom system，the galloping amplitude of the conductor is greatly influenced by the frequency ratio，and the larger thefrequencyratio，the smallerthegalopingamplitude.Inthe vertical-horizontal two-degreeof-freedom system，when the vertical frequency is equal to the horizontal frequency，the conductor is coupled to vibrate，and its gallopingamplitudeinthe vertical direction is greater than thatinother frequencies.When the conductorgalops inthe flow field，its horizontal movementpromotes vertical vibration，and itsmotion trajectory inthe flow field is elongated.The research results clarify the influence of aerodynamic coupling characteristics on the galloping of crescent-shaped iced single conductor，which can provide some theoretical referenceforthe study of galloping and dancing prevention of the conductor in engineering.
Keywords： crescent-shaped iced conductors; aerodynamic coupling; galoping amplitude; fluid-structure coupling
架空输电导线覆冰后，输电导线的截面形状会发生变化，根据气象条件和导线位置不同，可能形成新月形、D形或扇形等非圆形截面。（剩余14091字）
