建筑结构学报2018，Vol.39Issue(1)：28-34,7.DOI:10.14006/j.jzjgxb.2018.01.004
台风“海马”登陆过程近地风场脉动特性研究
Study on near-ground turbulence characteristics of typhoon Haima during landfalling
摘要
Abstract
In order to understand the turbulence characteristics of near-surface wind field during the typhoon landing,the time history data about the landing progress of typhoon ‘ Haima’ was obtained by using Windcube V2 Doppler lidar,and the data of 12 measuring points between 40-290 m height was obtained.Based on the observation results,the mean wind speed and wind direction,wind profile,gust factor,turbulence intensity and turbulence integral scale in the typhoon center and the strong wind area of the eye wall were analyzed.The results show that the mean wind speed of typhoon ‘ Haima’ has an ‘ M’ bimodal distribution,and the wind direction changes nearly 180° before and after the typhoon landfall.The mean wind speed profile has obvious different types in the typhoon center and the eye wall strong wind area;the wind direction profile is different between the typhoon and the monsoon,also,the wind direction profile is not uniform along the height.The ratio of turbulence intensity in the longitudinal,lateral and vertical direction is 1:0.91:0.40 in eye wall strong wind region,the lateral turbulence intensity of the typhoon ‘ Haima’ is larger and the vertical turbulence intensity is smaller compared with the standard value.The longitudinal and lateral gust factors reduce with the increase of the wind speed,the fitting formula between them was obtained by the non-linear relationship,and the results show that the fitting results are close to the measured data.The turbulence integral scale is larger in the strong wind area of the eye wall and changes greatly before and after the typhoon landed,also,the turbulent integral scale of the posterior eye wall is larger than that of the anterior eye wall,which is obviously affected by the landform characteristics.关键词
台风海马/现场实测/台风中心/近地层/湍流特性Key words
typhoon Haima/field measurement/typhoon center/near ground layer/turbulence characteristic分类
建筑与水利引用本文复制引用
姚博,聂铭,谢壮宁,肖凯..台风“海马”登陆过程近地风场脉动特性研究[J].建筑结构学报,2018,39(1):28-34,7.基金项目
广东电网公司重点科技项目(GDKJQQ20153009). （GDKJQQ20153009）
