基于台风&ldquo;海葵&rdquo;实测的近地脉动风速功率谱及相关性研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (22) : 125-130.

论文

基于台风“海葵”实测的近地脉动风速功率谱及相关性研究

王旭1,2，安毅3，黄鹏2，周海根2

作者信息 +

Study on power spectral densities and correlation analysis of fluctuating wind speed near ground based on the measurement of typhoon ‘HaiKui’

WANG Xu1,2, HUANG Peng2 , ZHOU Haigen2,GU Ming2

Author information +

文章历史 +

摘要

基于上海浦东机场实测基地测风塔上10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本文提出的Kaimal修正谱符合较好；互相关系数在各高度处随平均风速的变化基本保持稳定，而互相关系数和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，互相关系数的负相关性逐渐减小。

Abstract

Based on the field data recorded at the heights of 10 and 30m in Shanghai Pudong Airport Field Measurement Basement during the passage of typhoon Haikui, the spectra of fluctuating wind speed, as well as the correlation of longitudinal, lateral and vertical components of fluctuating wind speed were studied in detail. 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 mean wind speed, and the turbulent kinetic energy of high wind speed is greater in inertial sub-range. Under individual condition, spectrum value within a certain range of inertia subplot increase with Mourning coordinate. Measured cross-spectrums in low and highfrequencies are in good agreement with the Kaimal correction spectrum; Cross correlation coefficients at various heights remain stable with the changes of average wind speed, while cross correlation coefficients and at various heights have relatively large discrete with the changes of average wind speed, and cross correlation coefficient increases corresponding to the increase of height.

导出引用

王旭1,2，安毅3，黄鹏2，周海根2. 基于台风“海葵”实测的近地脉动风速功率谱及相关性研究[J]. 振动与冲击, 2017, 36(22): 125-130

WANG Xu1,2, HUANG Peng2,ZHOU Haigen2,GU Ming2. Study on power spectral densities and correlation analysis of fluctuating wind speed near ground based on the measurement of typhoon ‘HaiKui’[J]. Journal of Vibration and Shock, 2017, 36(22): 125-130

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