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

Guo Tao; Yang Yuanming; Huang Guoqiang; Zhang Jinming

doi:10.19912/j.0254-0096.tynxb.2022-1198

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (11) : 131-140. DOI: 10.19912/j.0254-0096.tynxb.2022-1198

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

Guo Tao¹, Yang Yuanming¹, Huang Guoqiang², Zhang Jinming¹

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Abstract

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.

Key words

PV arrays / flexible support / wind-induced vibration response / numerical wind tunnel / wind vibration coefficient / drag structure

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Guo Tao, Yang Yuanming, Huang Guoqiang, Zhang Jinming. WIND-INDUCED VIBRATION ANALYSIS OF FLEXIBLE PHOTOVOLTAIC SUPPORT STRUCTURE UNDER MOUNTAIN CANYON TERRAIN[J]. Acta Energiae Solaris Sinica. 2023, 44(11): 131-140 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1198

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