Wind Tunnel Investigations of Aeroelastic Electricity Transmission Tower under Synoptic and Typhoon Winds
Publication: Journal of Aerospace Engineering
Volume 34, Issue 1
Abstract
Wind tunnel tests of an aeroelastic tower model at a length scale of were conducted to investigate the dynamic responses of an electricity transmission tower under synoptic and typhoon winds. The aeroelastic tower model was successively subjected to boundary layer and typhoon wind forcing in a single wind tunnel. The purpose of this study is to assess differences of the dynamic structural responses under two types of wind forcing and understand the underlying mechanism of transmission tower failures due to strong typhoons. The results indicated that the acceleration responses of the aeroelastic tower model were composed of resonant and background parts, while dominated by the resonant counterpart, and the dynamic responses of the transmission tower could be increased by up to 30% in the along-wind and crosswind directions under typhoon wind forcing. The wind load factors determined from the experimental results under typhoon winds were generally larger than those obtained from Chinese codes and standards. Suggestions on the wind-resistant design of an overhead transmission tower in typhoon-prone areas were proposed. The dynamic wind loads should be substituted by the most conservative values among different Chinese standards in estimating the equivalent static wind loadings of overhead towers under typhoon wind forcing.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request (including FEM model in the numerical analysis and responses of the aeroelastic tower model in the wind tunnel test).
Acknowledgments
This study is funded by the grants from the National Natural Science Foundation of China (Project Nos. 51778072, 51878104, and 51720105005), China Overseas Expertise Introduction Project for Discipline Innovation (B18062), China Postdoctoral Science Foundation (2018M831063), the National Key Research and Development Program of China (2019YFF0301904), and the Fundamental Research Funds for the Central Universities (Grant No. 2020CDJQY-A062).
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Published In
Journal of Aerospace Engineering
Volume 34 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Mar 10, 2020
Accepted: Aug 5, 2020
Published online: Oct 24, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 24, 2021
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