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Apr 26, 2012
Analytical Study on Wind-Induced Vibration of Transmission Line Systems in Mountainous Areas
Authors: Junqi Chen [email protected], Hongzhe Dai [email protected], and Wei Wang [email protected]Author Affiliations
Publication: Earth and Space 2010: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
This paper describes a method for analyzing wind-induced vibrations of transmission towers coupled with power lines in mountainous areas. The time histories of wind speed acting on transmission line systems are simulated with the harmony superposition method. It discusses the mean displacements at towers' tip, the unbalanced tensions and uplift forces of towers which are in different elevations and wind directions. It also discusses the vibration frequency spectrums of tower. The numerical results show that the mean displacement at tower' tip and uplift force of tower which is at the top of mountain are maximal. However, the unbalanced tension of tower which is on the hillside is maximal. It is concluded that the displacement at tower's tip is mainly influenced by the vibration of wires. However, velocity and acceleration at tower's tip are mainly imposed by the primary frequency and first mode shape of tower.
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© 2010 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Ph.D. Candidate, School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China. E-mail: [email protected]
Ph.D. Candidate, School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China. E-mail: [email protected]
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China (corresponding author). E-mail: [email protected]
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