Wind Characteristics of Near Strata Based on Field-Measured Data

被引：0
|
作者：
Wang X. [1 ]
Luan X. [1 ]
Li W. [1 ,2 ]
Du Y. [1 ,2 ]
机构：
[1] Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou
[2] Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou
来源：
Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | 2021年 / 41卷 / 06期
关键词：
Fluctuating wind spectrum; Gust factor; Turbulence integral scale; Turbulence intensity; Wind velocity and wind direction data;
D O I：
10.16450/j.cnki.issn.1004-6801.2021.06.004
中图分类号：
学科分类号：
摘要：
Based on the wind velocity and wind direction data collected by the wind tower of the Nation Wind Technology Center at different heights near the ground in gale weather, the wind field characteristics such as the mean wind speed and wind direction, turbulence intensity, gust factor, turbulence integral scale and fluctuating wind spectrum are analyzed. The results show that the mean wind direction will be low when the mean wind speed curve has a large spike. The downwind turbulence intensity and turbulence integral scale are obviously larger than the corresponding turbulence intensity and turbulence integral scale in cross wind direction and vertical wind direction, and the ratio of each component is about 1:0.121 3:0.188 6. The empirical formulas can better reflect the relationship between the downwind gust factor and the turbulence intensity, and the corresponding empirical formulas are obtained by curve fitting with the measured data. The downwind turbulence integral scale tends to decrease with the increase of mean wind speed, while the vertical wind direction turbulence integral scale exponentially increases with the increase of mean wind speed, and the longitudinal measured power spectrum of fluctuating wind speed is not in good agreement with Von Karman spectrum and Kaimal spectrum. Moreover, the power spectrum of vertical fluctuating wind speed and Panofsky empirical spectrum are deviated from each other in high frequency band, and the empirical spectrum obtained by fitting is closer to the measured spectrum. © 2021, Editorial Department of JVMD. All right reserved.
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页码：1066 / 1073
页数：7
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