Study on power spectral densities and correlation analysis of fluctuating wind speed near ground based on the measurement of typhoon &lsquo;HaiKui&rsquo;

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (22) : 125-130.

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

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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.

Key words

Typhoon ‘HaiKui’ / field measurement / fluctuating wind speed；?power spectrum / correlation

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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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