空气动力学学报2012，Vol.30Issue(3)：380-387,399,9.
基于近海海面观测的台风黑格比风特性研究
Study on wind characteristics of typhoon Hagupit based on offshore sea surface measurements
摘要
Abstract
Wind data are often measured near seaside or over flat smooth terrain inland, in which case the wind characteristics were influenced by topography and typhoon structure synthetically. In this paper, based on the field measured data of typhoon Hagupit on Bohe station, firstly the principles to detect and amend the spikes were proposed. Secondly, wind characteristics including wind profile, angle of attack, gradient height, turbulence intensity, gust facotr, time scale, length scale and power density spectra et. al, were carefully analyzed. The results show that the exponential index a of power law profile is less than the recommended value for onshore wind in load code for the design of building structures! the angle of attack induced by typhoon field is about 3°～7°; the 3s gust facotr is 1. 23 over sea surface; the longitudinal turbulence intensity is 0. 1 and the ratio among the three dimensional trbulence intensity is 1 : 0. 80 : 0. 43, the horizontal time scales are less than 30s and the vertical time scales are less than 10s; the length scales in both the two horizontal directions are nearly equal, but greater than the values in vertical direction; the field measured power density spectra follow von Karman spectral model better in contrast wity other empirical power spectral model.关键词
台风/风剖面/风攻角/湍流强度/积分尺度/风速谱Key words
typhoon/wind profile/wind attack angle/turbulence intensity/integral scale/wind spectra分类
建筑与水利引用本文复制引用
肖仪清,李利孝,宋丽莉,秦鹏..基于近海海面观测的台风黑格比风特性研究[J].空气动力学学报,2012,30(3):380-387,399,9.基金项目
国家自然科学基金重点项目(90715031) （90715031）
科技支撑计划(2006BAJ06B05) （2006BAJ06B05）
