Wind Tunnel Test Study on Time-frequency Domain Characteristics of Wind-induced Response of Transmission Lines

被引：0
|
作者：
Liu M. [1 ]
Zhuo J. [1 ]
Xiao S. [2 ]
Yu X. [1 ]
Liu C. [1 ]
机构：
[1] School of Civil Engineering & Transportation, South China University of Technology, Guangzhou
[2] Guangzhou Urban Planning Design & Survey Research Institute, Guangzhou
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 09期
基金：
中国国家自然科学基金;
关键词：
aerodynamic perfor⁃ mance; aeroelastic model; bundled conductors; response spectrum; wind tunnel testing;
D O I：
10.16339/j.cnki.hdxbzkb.2023099
中图分类号：
学科分类号：
摘要：
Based on the wind tunnel test of the single-span transmission line aeroelastic model，the characteristics of displacement spectrum，aerodynamic force spectrum，aerodynamic damping，and gust response factor for single and 4-bundled conductors are investigated，and the effects of wind speed，conductor bundled number and intensity turbulence are discussed. The results show that the multi-modes are significantly involved in the wind-induced vibration of the conductor，and the modal frequency increases nonlinearly with the increase of wind speed while the frequency increases more obviously at high turbulence. The response spectrum energy for the conductor increases with the intensity of turbulence and bundled number，and a multi-bundled conductor and high turbulence can shift the vibration energy of the conductor to a lower frequency. The background component of conductor aerodynamic force increases overall with the increase of wind speed and intensity turbulence and decreases with the increase of bundled number. The trend of aerodynamic damping ratio with increasing wind speed and intensity turbulence is not obvious. The conductor aerodynamic damping ratio of the first-order mode is about 5~9 times that of the no-wind state，and about twice that of the second-order mode. The gust coefficient of displacement is significantly lower than that of drag，and the two kinds of gust coefficients increase overall with the increasing turbulence. © 2023 Hunan University. All rights reserved.
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页码：24 / 31
页数：7
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