不同布置形式平单轴光伏支架颤振性能研究  

Study on Flutter Performance of Flat Single-axis Tracking Photovoltaic in Different Arrangement Forms

作　　者：牛华伟[1] 陈权 姜东 李红星 NIU Huawei;CHEN Quan;JIANG Dong;LI Hongxing(College of Civil Engineering,Hunan University,Changsha 410082,China;Northwest Electric Power Design Institute Co.Ltd.of China Power Engineering Consulting Group,Xi’an 710075,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]中国电力工程顾问集团西北电力设计院有限公司,陕西西安710075

出　　处：《湖南大学学报（自然科学版）》2024年第5期106-113,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金面上项目(52178477)。

摘　　要：对1V和2V两类不同布置形式平单轴光伏支架开展缩尺比为1/6的弹性悬挂节段模型测振风洞试验,研究了倾角(-60°~60°)、阻尼水平和光伏组件之间有无间隙对结构颤振性能的影响.结果表明:1V在-30°~30°倾角下发生明显的扭转颤振,2V在±10°、±20°和±30°时发生明显的扭转颤振;对于两类支架,结构颤振临界无量纲风速随倾角绝对值的增大先减小后增大,最大差值超过3.87倍(1V)和2.45倍(2V),且相同工况下,负倾角颤振性能优于正倾角;建议选择0°作为结构大风保护角度;1V和2V结构颤振性能随阻尼比的增大而提升,但和2V相比1V颤振性能提升对于阻尼比更不敏感;光伏组件之间的间隙对结构颤振性能基本无影响.Through the wind tunnel test by section models with a scale ratio of 1/6 for the 1V and 2V flat singleaxis tracking photovoltaic,the influences of inclination angles(-60°to 60°),damping level,and gap between photovoltaic modules on the wind vibration characteristics of the structure are investigated.Results indicate that 1V exhibits obvious torsional flutter at inclination angles from-30°to 30°,while 2V exhibits such flutter at±10°,±20°,and±30°;when the absolute value of inclination angles is increased for the two types of photovoltaic,the critical dimensionless wind speed of structural flutter first decreases and then increases;the maximum difference exceeds 3.87 times(1V)and 2.45 times(2V),and under identical operating conditions,the negative inclination angles perform better than the positive inclination angles on the flutter;it is recommended to set 0°as the wind protection angle of the structure;when the damping ratio is increased,both 1V and 2V′s flutter performance improve,although 1V′s improvement in flutter performance is less sensitive to damping than 2V′s.The gaps between photovoltaic modules have virtually no effect on the flutter performance of the structure.

关 键 词：平单轴光伏支架 风洞试验 颤振 倾角 阻尼比 间隙 

分 类 号：TU352.2[建筑科学—结构工程] TU375.4