摘要
通过对作用在杭州市民中心的自然脉动风进行长期连续监测,对湍流强度、阵风因子和湍流积分尺度的统计值进行分析研究。分别采用10 min和1 h的基本时距计算纵向和竖向脉动风速谱,基于各向同性湍流理论推导出横向脉动风速谱,并与经验风谱进行了比较。最后,对纵向和竖向常用的几种功率谱密度函数进行了拟合修正,提出了精度优于常用风谱的谱函数表达式。
Long time observation of natural wind imposed on Hangzhou Citizen Center was performed. The turbulence characteristics, including turbulence intensity, gust factor, integral length scales and wind spectrum, were summarized based on a large amount of measured data. Longitudinal and vertical wind spectrumare summarized based on the basic time-distance of 10 minutes and 1 hour, lateral wind spectrum were also summarized based on isotropic turbulence theory, the comparison to the experience wind spectrum was performed. Finally, the fitting curves of longitudinal and vertical wind spectrum were developed from the monitoring data, the fitting wind spectrum was improved with higher precision.
出处
《结构工程师》
2009年第2期108-114,123,共8页
Structural Engineers
基金
上海市青年科技启明星计划(B类)资助(07QB14044)
关键词
湍流强度
阵风因子
湍流积分尺度
脉动风速谱
风谱拟合
turbulence, intensity, gust, factor, integral length scale, fluctuation wind speed spectrum, wind spectrum fitting
