多排多跨柔性光伏支架的风致振动分析

Wind-induced vibration analysis of multi-row and multi-span flexible photovoltaic support

应用SAP2000软件对横向3排、纵向3跨布置的大跨度柔性光伏支架体系进行有限元建模,分析其在风压、风速时程作用下的动力反应状态。为准确考察大跨度支架体系悬索的位移状态,分别采用考虑与不考虑脉动风的空间相关性2种分析方法对结构体系进行时程分析,考察结构上弦、中上弦、中下弦、下弦的位移状态。结果表明,在结构总体跨度较大、空间较长的情况下,不考虑脉动风的空间相关性可能会使分析结果偏小,建议针对大跨度支架体系进行包络设计。该研究可为今后大跨度支架体系设计提供参考。

The SAP2000 software is used to carry out finite element modeling of a large-span flexible photovoltaic support system with 3 rows horizontally and 3-span longitudinally,and analyze its dynamic response state under the action of wind pressure and wind speed time history.In order to accurately investigate the suspension cables of the long-span support system,the displacement state of the structure is analyzed by using two analysis methods,which do not consider the spatial correlation of the pulsating wind and the spatial correlation of the pulsating wind.The displacement state of the upper chord,middle upper chord,middle lower chord,and lower chord of the structure are investigated.It shows that in the case of a large overall structure span and a long space,the spatial correlation of the pulsating wind may not be considered,which may make the analysis result smaller.This paper recommends designing an envelope for the large-span stent system.It provides a reference for the future large-span bracket system.