A dynamic responses and evaluation method of the downburst wind loads effect on a transmission tower

被引：0
|
作者：
Zhao Y. [1 ]
Sun Q. [2 ]
Song Z. [2 ]
Wang D. [3 ]
Wang X. [3 ]
机构：
[1] State Grid Shandong Electric Power Company, Jinan
[2] State Grid Shandong Electric Power Company, Institution of Economy and Technology, Jinan
[3] School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 12期
关键词：
Downburst; Equivalent static wind load; Transmission tower; Wind-induced dynamic response;
D O I：
10.13465/j.cnki.jvs.2021.12.022
中图分类号：
学科分类号：
摘要：
Downburst is a typical local highly intensive wind all over the world, which attribute to main cause of wind damage to transmission lines in inland areas world widely. In this paper, based on the empirical model of downburst and the quasi-steady assumption, the wind load of moving downburst acting on the transmission tower was simulated. A spatial finite element model of the transmission tower was established, the wind-induced dynamic response of the transmission tower under three working conditions (mean wind, quasi-static and transient) of moving downburst was studied. The most unfavorable wind profile under the moving downburst average wind was found, and the relationship between the radial distance corresponding to the maximum structural response and the structure height and the jet diameter of the wind field was analyzed. At the same time, the wind-induced dynamic response of the transmission tower under the most unfavorable wind profile of the moving downburst was calculated by using the equivalent static wind load, and the results were compared with the time-varying analysis results. It provides an evaluation method for calculating the design wind load of transmission tower under the downburst. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：179 / 188and195
相关论文
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