摘要
基于上海浦东机场实测基地测风塔上10 m及30 m高度处台风"海葵"的现场实测数据,对台风"海葵"过境上海时的脉动风速功率谱和各向脉动风速分量之间的相关性进行了详细研究。研究表明:台风"海葵"脉动风速功率谱总体与Von Karman谱吻合良好,Von Karman谱能够较为准确的描述上海浦东地区的湍动能分布特性;风速谱值对平均风速的变化较敏感,高风速时段在惯性子区内具有更高的湍动能。实测互谱在低频和高频段均与Kaimal修正谱符合较好;互相关系数ρ_(uw)在各高度处随平均风速的变化基本保持稳定,而互相关系数ρ_(uv)和ρ_(vw)在各高度处随平均风速的变化离散性相对较大;随着观测高度的增加,互相关系数ρ_(uw)的负相关性逐渐减小。
Based on the field data recorded at the heights of 10 m and 30 m in Shanghai Pudong Airport Field Measurement Basement when the typhoon Haikui was coming,the spectra of fluctuating wind speed,as well as the correlation of longitudinal,lateral and vertical components of fluctuating wind speed were studied. It is shown that： the measured spectra fit well with the Von Karman spectra,which could describe the distribution of turbulent kinetic energy of Pudong District precisely. The spectrum value is sensitive to the variation of the mean wind speed,and the turbulent kinetic energy of high wind speed is greater in inertial sub-range. Measured cross-spectrums in low and high frequencies are in good agreement with the Kaimal correction spectrum. Cross correlation coefficients ρ_（uw）at various heights remain stable with the changes of average wind speed,while cross correlation coefficients ρ_（uw）and ρ_（vw）at various heights have relatively large discrete with the changes of average wind speed,and cross correlation coefficient ρ_（uw）increases with height.
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第22期125-130,238,共7页
Journal of Vibration and Shock
基金
国家自然科学基金面上项目(51308510)
中国博士后科学基金面上项目(2014M560706)
重庆市博士后基金(XM2015066)
关键词
台风“海葵”
现场实测
脉动风速
功率谱
相关性
typhoon ＇Haikui’
field measurement
fluctuating wind speed
power spectrum
correlation
