多排大跨度光伏柔性索桁架结构设计的差异化  

Differentiated of the Design of Multi-row Large-span Photovoltaic Flexible Cable Truss

作　　者：杨晶晶[1,2] 何卓威 朱虎霸 李宗伦 邓桂方 YANG Jing-jing;HE Zhuo-wei;ZHU Hu-ba;LI Zong-lun;DENG Gui-fang(College of Civil Aviation and Aviation,Kunming University of Science and Technology,Kunming 650504,China;Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]昆明理工大学民航与航空学院,昆明650504 [2]昆明理工大学机电工程学院,昆明650504

出　　处：《科学技术与工程》2024年第27期11817-11825,共9页Science Technology and Engineering

基　　金：云南省教育厅科学研究基金(2023J143)。

摘　　要：山地光伏电站建设的发展势头迅猛,光伏柔性索桁架结构应运而生。这种结构在原有单层悬索的柔性支架基础上增加了防风结构,能更好地适应复杂地形。但索桁架结构和受力更为复杂,目前缺少统一的设计规范,为研究光伏柔性索桁架两种典型结构的结构性能,采用有限元的方法对不同拱形矢高多排大跨度光伏柔性索桁架进行仿真分析,从结构模态、风振系数以及极限工况多角度开展研究。结果表明,增大防风索拱形的矢高,有利于抑制倒拱和正拱两种结构的风致振动;分析四种极限工况,矢高每增加100 mm,倒拱Z向位移平均减小率最小为10.07%,正拱最小为2.79%。同时倒拱结构的挠度变形和轴力等力学性能优于正拱结构,更具市场应用价值。The development of mountain photovoltaic power station construction is rapid and the prospect is bright.Photovoltaic bracket products have been introduced,and photovoltaic flexible cable truss structure has emerged.By adding a wind-proof system based on the single-layer cable flexible photovoltaic bracket,the structure could well adapted to complex terrain.The stress of cable truss structures is more complex,and there is currently a lack of unified design specifications.In order to study the structural performance of photovoltaic flexible cable trusses,the finite element method was used to simulate and analyze multi-row large-span photovoltaic flexible cable truss with different structure and different arch height.The modes,wind vibration coefficients and limit working conditions of different structures were analyzed.The results show that the increase in the arch height of the wind-proof cable is beneficial to the suppression of wind-induced vibrations of both inverted arch and forward arch structures.Analyze four extreme working conditions,and for every 100mm increase in height,the minimum average reduction rate of Z-direction displacement in the inverted arch is 10.07%,and the minimum for the normal arch is 2.79%.At the same time,the mechanical properties such as deflection deformation and axial force of the inverted arch structure are better than those of the regular arch structure,and it has more market application value.

关 键 词：光伏柔性索桁架 有限元仿真 风振系数 脉动风荷载 极限工况 

分 类 号：TU399[建筑科学—结构工程]