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Wind and Structures Volume 33, Number 2, August 2021 , pages 155-168 DOI: https://doi.org/10.12989/was.2021.33.2.155 |
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Study of structural-thermal characteristics of electrified conductors under aeolian vibration |
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Meng Zhang, Jian Zhou, Guifeng Zhao, Jiankun Xu and Chao Sun
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| Abstract | ||
| High-voltage transmission lines are featured by electrical and structural properties. Current studies on aeolian vibration of transmission lines focus primarily on structural responses of unenergized conductors. However, moderate aeolian vibration can also enhance the convection heat transfer capability of a transmission line, which improves the steady current-carrying capacity. In this paper, a fluid-structure interaction (FSI) model is established to study the structural thermal characteristics of overhead electrified aluminum conductor steel-reinforced cable (ACSR) conductors. Moreover, the fatigue damage of the energized conductor is analyzed under operational conditions. Results show that there is considerable influence from aeolian vibration on the current-carrying capacity of energized conductors. Compared with the nonelectrical conductors, aeolian vibration can enhance the convective heat transfer effect of energized conductors. Additionally, fatigue life of electrified transmission lines is larger than that of nonelectrical conductors under aeolian vibration. The developed structure-fluid-thermal model can be used to aid design and operation optimization of transmission lines. | ||
| Key Words | ||
| aeolian vibration; current-carrying capacity; electrified conductor; fatigue life; mechanical property | ||
| Address | ||
| Meng Zhang: School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China/ Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A. Jian Zhou: School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China Guifeng Zhao: School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China/ Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A. Jiankun Xu: School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China Chao Sun: Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A. | ||