Research on Wind Vibration Response Characteristics of Large Span Photovoltaic Tracking Support Structure
To study the wind-induced vibration response characteristics of large-span photovoltaic track-ing brackets,a flat single axis tracking photovoltaic bracket was taken as the research object,and its dynamic characteristics were analyzed.The harmonic superposition method was used to simulate the fluctuating wind speed time history.The wind-induced vibration response of the bracket was studied using the time history analysis method,and the effects of the average wind speed,photovoltaic panel in-clination angle,and wind direction angle on the wind-induced vibration response of the photovoltaic tracking bracket structure were investigated.The results indicate that the natural frequency of photovol-taic tracking brackets is low and distributed centrally.Among all supporting components,the wind in-duced displacement response of purlins is the highest,while the displacement response of main beams and columns is relatively small.The displacement response of purlins along the windward direction has asymmetry,while the displacement response of the main beam along the windward direction is consistent with the symmetry of its own structure.The wind-induced displacement response of the structure increa-ses with the increase of average wind speed,photovoltaic panel inclination angle,and wind direction an-gle.Under negative wind loads,the wind vibration response of photovoltaic tracking brackets is more severe.When the inclination angle of the photovoltaic panel increases from 25° to 35°,the stiffness of the bracket will rapidly decrease.The lateral pulsating wind has a significant impact on the displace-ment response of the main beam and columns.
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