风场长期观测与数据分析  

Long-term Observation and Data Analysis of Wind Field

作　　者：阎启[1] 谢强[1,2] 李杰[1,2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《建筑科学与工程学报》2009年第1期37-42,共6页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金创新研究群体科学基金项目(50621062);国家自然科学基金项目(50778135);国家自然科学基金项目(50508026)

摘　　要：为了进行风场现场实测研究,对1组风速采集设备的风场长期观测结果进行了分析。基于现场实测数据,得到了10 m和20 m高度处10min平均风速年最大值的风玫瑰图;选取了总时长达75 h的18组大风记录,计算了湍流强度、风剖面参数、剪切波速;拟合了风速谱并与Von Karman谱、欧洲规范谱进行了比较;统计了主风方向湍流积分尺度;对风场的垂直相关性进行了分析。结果表明:实测湍流强度较经验值略大;风剖面参数的离散性大,而且均值与荷载规范取值存在一定差异;实测大风记录拟合风速谱与Von Karman谱和欧洲规范谱吻合良好。In order to study natural wind property, long-term observation results of wind field were analyzed. Based on the site observation, wind rose plots of annual maximum 10 min mean wind velocity at 10 m and 20 m were given. 18 series of record of strong wind （75 hours totally） were selected to calculate turbulence intensity, wind velocity profile parameters and shear wave velocity. Wind velocity spectrum was calculated and compared with Von Karman spectrum and Eurocode spectrum. The statistics of turbulence integral scale in primary wind direction was obtained and vertical correlation of wind field was analyzed. The results show that the measured turbulence intensity is a little higher than empirical value. Wind velocity profile parameters are scattered and the mean values differ from values recommended by load code. The measured wind velocity spectrum matches well with Von Karman spectrum and Eurocode spectrum.

关 键 词：风场 长期观测 数据分析 风玫瑰图 湍流结构 风速谱 剪切波速 

分 类 号：TU973.32[建筑科学—结构工程]