傍山地区的强风场特性实测研究  

Full scale measurement of a strong wind near mountains

作　　者：陈凯[1] 余永生[1] 贾丛贤[1] 

机构地区：[1]北京大学湍流与复杂系统研究国家重点实验室,北京100871

出　　处：《流体力学实验与测量》2003年第3期18-22,共5页Experiments and Measurements in Fluid Mechanics

基　　金：国家自然科学基金(No.59895410)

摘　　要：介绍了某傍山地区的强风现场测量研究。采用较高频响的风速风向计与实时数据检测处理系统测得了该地区的风特性,并对一次冬季强风记录进行了分析研究,给出了反映强风脉动特性的两个重要参数-湍流度和阵风系数的关系,指出脉动风速的概率分布直接影响了二者比值大小。此外,通过实测结果与邻近气象站的同期记录比较,发现二者的相关性很差,在整个强风过程中,该地区的最大瞬时风速和平均风速都远远高于气象站的记录,表明傍山地区局部风场有很大的特殊性。This paper describes a study on wind data measured near mountains during a strong wind event. An anemometer with high frequency response and an automatic data acquisition system were used for the measurement. The ratio between the turbulence intensity and the gust factor has been obtained and it is shown that the ratio is influenced significantly by the PDF of fluctuating wind speed. Besides, it is found that the mean and the maximum wind speed at the site were much higher than that at the nearest meteorological station.

关 键 词：傍山地区风声 测量 湍流度 阵风系数 建筑设计 风载荷 

分 类 号：TU312.1[建筑科学—结构工程]