WIND-INDUCED VIBRATION ANALYSIS OF FLEXIBLE PHOTOVOLTAIC SUPPORT STRUCTURE UNDER MOUNTAIN CANYON TERRAIN

被引：0
|
作者：
Guo T. [1 ]
Yang Y. [1 ]
Huang G. [2 ]
Zhang J. [1 ]
机构：
[1] Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming
[2] Jiangxidatang International Xinyu Power Generation Co.，Ltd., Xinyu
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 11期
关键词：
drag structure; flexible support; numerical wind tunnel; PV arrays; wind vibration coefficient; wind-induced vibration response;
D O I：
10.19912/j.0254-0096.tynxb.2022-1198
中图分类号：
学科分类号：
摘要：
In order to accurately investigate the overall wind resistance performance of flexible support photovoltaic array this paper takes a photovoltaic power project as the research object，establishes the overall model of solar photovoltaic arrays with pre-tensioning of flexible ropes，the flow field and wind-induced vibration response are analyzed based on Davenport wind spectrum and auto-regressive technique. The results showe that the wind pressure shape coefficient is decreased along the wind direction with obvious gradient. Therefore，the wind load distribution on the surface of photovoltaic module is non-uniform，which is the main cause of torsional vibration of photovoltaic modules under the action of wind. The photovoltaic modules at the edge of array are most affected by the wind field，which is the dangerous area and should be given sufficient attention in this design. The response amplitude of wind-induce vibration is about 8.0 cm，and the probability of collision and hidden crack between photovoltaic module is low. It shows that the flexible support structure can be used as a substitute for rigid support. The structural stiffness of the flexible support photovoltaic arrays is uniform distributed. So the wind-induced vibration response trend of all photovoltaic modules is the same，and it’s mainly low-frequency vibration，the wind-induced vibration coefficient is about 1.7. Anchor cable has a significant constraint effect on vibration，Therefore，the distribution adjustment of cable number and position can be used as the preferred condition for structural optimization. © 2023 Science Press. All rights reserved.
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页码：131 / 140
页数：9
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