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《Water Resources and Power》 2008-03
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Analysis of Aeolian Vibration Influence Factors on UHV Transmission Conductor

LIANG Zhengping1,2 WANG Cheng2 KONG Deyi3 LI Li3(1.China Power Eng.Consulting Groups Corporation,Xicheng District,Beijing 100011,China;2.College of Hydropowerand Information Eng.,HUST,Wuhan 430074,China;3.School of Civil Eng.and Mechanics,HUST,Wuhan 430074,China)  
Differing from the traditional energy balance method(EBM),the aeolian vibration has been researched by the semi-analytical solution.First,the vibration equation of the conductor was obtained by Lagrangian's equations.Second,a new aero-vibration force induced by shed vortex had been educed by wind power equivalent principle,and this force has the capability to account for the aero-vibration distribution and the wind power input which had been obtained in laboratory.Third,the displacement amplitude of conductor could be obtained based on the orthogonal property of the principal modes mathematically,and then semi-analytical solution could be computed by iterative methods.In addition,the distribution of dynamic bending strain along the conductor has been obtained.Taking 1000kV UHV transmission conductors as an example,the conductor was computed by the semi-analytical solution.Compared with the results which were computed by EBM,the semi-analytical solution is effective for aero-vibration analyses.In addition,influences of different factors,for instance,the tensile force,the suspension height,the physiognomy of pass through,span and the numbers of the sub conductors,had been analyzed by this method.
【Fund】: 国家电网公司科研基金资助项目(SGKJ[2007]413)
【CateGory Index】: TM75
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