东南大学学报（自然科学版）2016，Vol.46Issue(2)：379-385,7.DOI:10.3969/j.issn.1001-0505.2016.02.024
台风“梅花”作用下中国航海博物馆风场特性及风振响应实测分析
Field measurement on wind filed characteristics and wind-induced vibration response of China Maritime Museum during typhoon‘Muifa’
摘要
Abstract
The field measurement of the wind field around China Maritime Museum and the wind-in-duced vibration response of China Maritime Museum's hyperbolic cable net structure during the ty-phoon ‘Muifa’ was carried out by using ultrasonic anemometers and accelerometers.The wind field characteristics of typhoon ‘Muifa ’ , such as the probability density distribution of the fluctuating wind speed, the turbulence intensity, the gust factor, the turbulence integral scale and the wind speed power spectra, and the wind-induced vibration characteristics, such as the probability density distribution of the acceleration, the power spectra, the natural frequency, the damping ratio and the mode, were analyzed.The results show that the probability density distribution of the fluctuating wind speed follows the Gaussian distribution.The turbulence intensity and the gust factor decrease with the increase of the mean wind speed.The ratio of the average longitudinal turbulence integral scale influenced by the longitudinal, lateral and vertical wind is 12.1∶3.4∶1.0.The turbulence inte-gral scale is weakly correlated with the mean wind speed and decreases with the increase of the turbu-lence intensity.The measured spectra of the fluctuating wind speed agree with the Von Karman spec-trum.The wind-induced vibration has strong non-Gaussian characteristics.With the increase of the amplitude thresholds, the change of the damping ratio can be divided into the linear incremental stage and the stationary stage.The natural frequencies obtained by the spectral analysis method, the ran-dom decrement method, and the random subspace method are in good agreement.关键词
现场实测/双曲面单层索网/台风/风场特性/风振特性Key words
field measurement/monolayer hyperbolic cable net/typhoon/wind field characteris-tics/wind-induced vibration characteristics分类
建筑与水利引用本文复制引用
李兆杨,杨彬,张其林..台风“梅花”作用下中国航海博物馆风场特性及风振响应实测分析[J].东南大学学报（自然科学版）,2016,46(2):379-385,7.基金项目
国家自然科学基金资助项目（51408432，90815003）、“十二五”国家科技支撑计划资助项目（2011BAJ08B10）． （）
