建筑结构学报2013，Vol.34Issue(9)：82-90,9.
北京郊外近地面风场特性实测研究
Field measurements of wind characteristics near ground in Beijing suburbs
摘要
Abstract
To explore the wind characteristics near ground,a 15m high meteorological mast located in Yanqing,Beijing was erected and four anemometers were arranged at 3.5 m,6.5 m,10 m,12.5 m height,respectively.By the field measurements,longer time wind datum were acquired,and further analysis was conducted to obtain the mean wind and direction,turbulence intensity,gust factor,the turbulence integral length,coherence function,and wind power spectrum.The results demonstrate the mean wind is accorded with the value of various codes except at 3.5 m height.The result of turbulence intensity and gust factor is reduced with height,and the measured turbulence intensity is close to the foreign standard but higher than the value recommended by GB 50009-2012.The turbulence integral scale is increased with mean wind speed but different from some codes' recommended values.The decay coefficient of coherence function is varied with the distance,and an obvious contrast between the results of measurements and the recommendation value by Davenport was pointed out.A discrepancy between the measured and the typical wind power spectra is depicted.关键词
近地风场/现场实测/风场特性/湍流特性Key words
near ground wind field/ field measurements/ wind characteristics/ turbulence characteristics分类
建筑与水利引用本文复制引用
李正农,吴卫祥,王志峰..北京郊外近地面风场特性实测研究[J].建筑结构学报,2013,34(9):82-90,9.基金项目
国家自然科学基金项目(50978094,51008237,51178180,51278190). （50978094,51008237,51178180,51278190）
