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《重庆大学学报(英文版)》 2008-04
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Numerical analysis on aeolian vibration of transmission lines with Stockbridge dampers

LI Li 1,KONG De-yi 1,LONG Xiao-hong 1,FANG Qin-han 1,2 1 Hubei Key Laboratory of Control Structure,Huazhong University of Science and Technology,Wuhan 430074,P.R.China 2 Zhongtie Major Bridge Reconnaissance and Design Institute Co.Ltd,Wuhan 430050,P.R.China  
We used computational fluid dynamics(CFD) and mode superposition method instead of the energy balance method to compute transmission line aeolian vibrations induced by the Karman vortex.Firstly,we obtained the wind power inputs using CFD theory.The result is effective for aeolian vibration analyses compared with the power which were measured in wind tunnel tests.Then a new aeolian excitation was derived using the wind power equivalent principle,and the aeolian vibration distribution along transmission lines and the wind power input obtained by CFD can be account.Secondly,we formulated the motion equation of a conductor-damper system and derived a semi-analytial solution using the mode superposition method.The Stockbridge-type dampers attached were simplified to the forces transmitted by the clamps.Finally,the semi-analytical solution can be solved by iterative methods.Taking a 1 000 kV Ultra High Voltage transmission line as an example,we analyzed the line with and without dampers by the semi-analytical solution.Compared with the results which were computed by the energy balance method,the semi-analytical solution is precise enogh for aeolian vibration analyses.Besides,we also analyzed the influence of damper position and quantity.
【Fund】: Funded by the National Natural Science Foundation of China (No.50878093);; the State Grid Company of China under Grant No. [2007]413. This support is greatly appreciated.
【CateGory Index】: O327
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