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Wind and Structures Volume 33, Number 4, October 2021 , pages 331-341 DOI: https://doi.org/10.12989/was.2021.33.4.331 |
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Performance of wind-excited 1000 kV substation gantry by aeroelastic model wind tunnel test |
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Feng Li, Yin Chen, Liang-Hao Zou, Jie Song and Shu-Guo Liang
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| Abstract | ||
| This study aims to investigate the performance of wind-excited 1000 kV substation gantry via the aero-elastic model wind tunnel test. An aero-elastic model that can simulate the first four frequencies was designed and manufactured by the method of combining semi-rigid segments by V-shape springs. Making use of the aero-elastic model wind tunnel test, the structural displacement and acceleration responses of the model were investigated for different wind speed and wind direction cases. Results show that the method of combining semi-rigid segments by V-shape springs can simulate the key parameters such as geometric shape, mass, frequency and damping ratio well. Wind direction plays an important role in the mean displacement responses, and the worst wind direction is 15° deviating from the corresponding axis. The root mean square of acceleration responses is remarkable in both the along-wind and cross-wind directions. In the direction perpendicular to the span, the wind-induced vibration of the middle tower mainly depends on the resonance component of the first mode. By contrast, the contributions of the first and higher modes are all important for the side towers' wind-induced responses. Gust response factors (GRFs) were estimated by the inertial wind loading method and the gust loading factor method, respectively. The range of the GRFs determined by the two methods is close to each other, which can provide guidance for assessing the performance of similar substation gantries subjected to wind. | ||
| Key Words | ||
| aero elastic model; gust response factor; substation gantry; wind-induced response; wind tunnel test | ||
| Address | ||
| Feng Li:School of Civil Engineering, Wuhan University, Wuhan 430072, China Yin Chen:Central Southern China Electric Power Design Institute Co., LTD of China Power Engineering Consulting Group, Wuhan 430071, China Liang-Hao Zou:School of Civil Engineering, Wuhan University, Wuhan 430072, China Jie Song:School of Civil Engineering, Wuhan University, Wuhan 430072, China Shu-Guo Liang:School of Civil Engineering, Wuhan University, Wuhan 430072, China | ||