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Structural Engineering and Mechanics Volume 82, Number 5, June10 2022 , pages 571-585 DOI: https://doi.org/10.12989/sem.2022.82.5.571 |
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Research on vibration control of a transmission tower-line system using SMA-BTMD subjected to wind load |
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Li Tian, Jingyu Luo, Mengyao Zhou, Wenzhe Bi and Yuping Liu
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| Abstract | ||
| As a vital component of power grids, long-span transmission tower-line systems are vulnerable to wind load excitation due to their high flexibility and low structural damping. Therefore, it is essential to reduce wind-induced responses of tower-line coupling systems to ensure their safe and reliable operation. To this end, a shape memory alloy-bidirectional tuned mass damper (SMA-BTMD) is proposed in this study to reduce wind-induced vibrations of long-span transmission tower-line systems. A 1220 m Songhua River long-span transmission system is selected as the primary structure and modeled using ANSYS software. The vibration suppression performance of an optimized SMA-BTMD attached to the transmission tower is evaluated and compared with the effects of a conventional bidirectional tuned mass damper. Furthermore, the impacts of frequency ratios and SMA composition on the vibration reduction performance of the SMA-BTMD are evaluated. The results show that the SMA-BTMD provides superior vibration control of the long-span transmission tower-line system. In addition, changes in frequency ratios and SMA composition have a substantial impact on the vibration suppression effects of the SMABTMD. This research can provide a reference for the practical engineering application of the SMA-BTMD developed in this study. | ||
| Key Words | ||
| bidirectional tuned mass damper; long-span transmission tower-line system; shape memory alloy; vibration control; wind excitation | ||
| Address | ||
| Li Tian, Jingyu Luo, Mengyao Zhou, Wenzhe Bi and Yuping Liu: School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China | ||