跟踪式光伏结构风荷载规范规定值与风洞试验值对比  

Comparison of wind load standard values of tracking photovoltaic(PV)structure with wind tunnel test values

作　　者：邹云峰[1,2] 李青婷 殷梅子 何旭辉 严磊[1,2] 刘勇 ZOU Yunfeng;LI Qingting;YIN Meizi;HE Xuhui;YAN Lei;LIU Yong(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High-speed Railway Construction Technology,Changsha 410075,China;Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311231,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]高速铁路建造技术国家工程研究中心,湖南长沙410075 [3]浙江同济科技职业学院,浙江杭州311231

出　　处：《中南大学学报（自然科学版）》2022年第4期1331-1340,共10页Journal of Central South University:Science and Technology

基　　金：湖南省科技创新计划项目(2021RC3016);中南大学研究生科研创新项目(1053320183215)。

摘　　要：与固定支架相比,跟踪式光伏结构刚度更小、倾角更大,对风荷载更敏感,但其风荷载取值依据和参考较少,为此,对国内外固定支架光伏结构风荷载计算可参考的相关规范中风荷载主要参数进行比较;通过刚性模型测压风洞试验,得到跟踪式光伏结构在典型倾角和风向角下的表面风压分布,并将实验得到的风荷载与参考不同规范计算得到的风荷载进行比较。研究结果表明:不同规范对光伏结构风荷载规定差异较大,依据各规范得到的光伏结构风荷载与试验结果均有差异;参考美国规范ASCE 7-10中的case B荷载类型和欧洲规范prEN 1991-1-4进行设计,风荷载取值偏于保守,若采用美国规范ASCE 7-10中的case A荷载类型与日本规范JIS C 8955:2011进行风荷载设计,则需要校核中心轴力矩作用;对于跟踪式光伏结构,参考中国规范GB 50797—2012和GB 50009—2012进行风荷载设计时,必须考虑风的动力效应;若更安全地对跟踪式光伏结构风荷载进行设计,则需要进行更多研究以得到跟踪式光伏结构风荷载设计准则。研究结果可为跟踪式光伏结构抗风设计的风荷载取值以及风荷载设计准则的制定提供依据和参考。Compared with fixed supports,the tracking photovoltaic(PV)structure is more sensitive to wind load due to its smaller stiffness and larger inclination angle,but there are few references for the wind load value,and therefore,the main parameters of wind load in relevant regulations that could be used for wind load calculation of fixed support photovoltaic structures at home and abroad were compared.And then,based on wind tunnel tests of rigid model,the surface wind load distribution of the tracking photovoltaic structure at the typical inclination angles and wind directions were obtained,and the wind load obtained by the test was compared with that calculated by referring to different regulations.The results show that the provisions of wind load on photovoltaic structures vary greatly in different regulations,and wind load of photovoltaic structures obtained according to different regulations is different from the test results.Referring to case B load type in the US load code ASCE 7-10 and the European load code prEN 1991-1-4,the wind load design will be conservative.If case A load type in ASCE 7-10 and JIS C 8955:2011 are adopted,the central axis torque should be checked.For the design of wind load of the tracking photovoltaic structure,the dynamic effect of wind must be considered when referring to China's code GB 50797—2012 and GB 50009—2012.In order to perform wind load design for tracking photovoltaic structures more safely,more research is needed to obtain the wind load design guidelines.The results in this study can provide basis and reference for the wind load of wind-resistant design of tracking photovoltaic structure and the formulation of wind load design criteria.

关 键 词：光伏结构 跟踪系统 风荷载 风洞试验 

分 类 号：U271[机械工程—车辆工程] U216[交通运输工程—载运工具运用工程]