Design and analysis of an aeroelastic model forthe 1 000 kV Sutong long span transmission tower-line system

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (12) : 1-8.

ZHAO Shuang1,YAN Zhitao1,2,LI Zhengliang1,DONG Jianyao3,NIE Xiaochun1

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Abstract

The Sutong long-span transmission tower-line system was of tall and long span, and the concrete in the steel tube may be invalidated by pull force in strong wind.These reasons made the design and analysis of its aeroelastic model difficult.Based on the data from the boundary layer wind tunnel test of a rigid model, the influences of loosening Froude number similarity criterion of transmission tower, changing the elastic stiffness of transmission line and two variable ratio transmission line models on the wind-induced responses were analyzed respectively by using the finite element model.Further, its aeroelastic model was designed.The influences of the material nonlinearity of concrete-filled steel tube and gradient wind height on the wind-induced responses were analyzed through the finite element model.The results show that by increasing the elastic stiffness of transmission lines and using the accurate line length similarity ratio, an aeroelastic model of Sutong long span can be designed reasonably; the influence of considering the material nonlinearity of concrete-filled steel tube on the wind-induced responses is small under designed wind speed, and the wind-induced responses decreases with the height of gradient wind.

Key words

transmission tower-line system / rigid model / Froude number / variable ratio transmission line model / aeroelastic model

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ZHAO Shuang1,YAN Zhitao1,2,LI Zhengliang1,DONG Jianyao3,NIE Xiaochun1. Design and analysis of an aeroelastic model forthe 1 000 kV Sutong long span transmission tower-line system[J]. Journal of Vibration and Shock, 2019, 38(12): 1-8

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