Development and Application of Eddy Current Damping-Based Tuned Mass Damper for Wind-Induced Vibration Control of Transmission Tower
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Published:2023-07-14
Issue:
Volume:
Page:
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ISSN:0219-4554
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Container-title:International Journal of Structural Stability and Dynamics
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language:en
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Short-container-title:Int. J. Str. Stab. Dyn.
Author:
Lei Xu1ORCID,
Shen Lian1,
Niu Huawei2,
Chen Jinlin2,
Xie Wenping3,
Zhang Xuewen1
Affiliation:
1. School of Civil Engineering, Changsha University, Changsha 410022, P. R. China
2. Wind Engineering Research Center, Hunan University, Changsha 410082, P. R. China
3. Electric Power Science Research Institute of Guangdong Power Grid, Guangzhou 510080, P. R. China
Abstract
To reduce the low-order vibrations of high-voltage transmission towers in response to strong winds, a tuned mass damper (TMD) that uses eddy current damping (ECD) with omnidirectional damping function (ECD-TMD) is proposed here. Compared with previous similar devices, the outstanding advantage of the proposed ECD-TMD lies in its use of non-contact ECD, structural simplicity, lack of internal friction, ability to sense micro-vibrations, and in the asymmetric cantilever pendulum structure that enables omnidirectional vibration suppression. Aero-elastic model wind tunnel test and field measurements were used for analyzing and validating the vibration responses of a 50-m-tall transmission tower with and without the proposed ECD-TMD. The results demonstrated that the proposed ECD-TMD reduced transmission tower’s first-order bending vibrations along and across the direction of transmission line. For the mass ratio of approximately 2%, approximately 18–27% reduction of acceleration and 10–25% reduction of displacement occurred. Because the first-order resonance of the tower body in response to wind accounts for a small fraction of the background response, the addition of a TMD device suppresses structural wind vibrations in a limiter manner but can significantly increase the first-order bending damping ratio of the tower.
Funder
Natural Science Foundation of Hunan Province
Education Department of Hunan Province
Science and Technology Bureau, Changsha
Changsha University of Science and Technology
Publisher
World Scientific Pub Co Pte Ltd
Subject
Applied Mathematics,Mechanical Engineering,Ocean Engineering,Aerospace Engineering,Building and Construction,Civil and Structural Engineering