基于实测数据的台风边界层风速剖面特征研究
Research on Wind Speed Profile Characteristics of Typhoon Boundary Layer Based on Measured Data
黄希桂 1罗胜昌 2李利孝2
作者信息
- 1. 哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳 518055
- 2. 深圳大学土木与交通工程学院,广东深圳 518060;深圳大学城市智慧交通与安全运维研究院,广东深圳 518060
- 折叠
摘要
目前规范中对台风影响区建筑物的抗风设计采用类比非气旋风场的方式来进行,然而大量实测结果表明台风剖面与非气旋风场风剖面存在较大差异,风剖面的影响因素和变化规律目前仍不明确.为清晰地了解台风的剖面特征及其规律,基于多个台风的实测剖面数据,以下垫面类型、台风结构分区和风速大小三类控制指标对数据进行分类,对各个类别的风剖面数据进行对比分析.研究表明:台风剖面中的近地急流层与下垫面类型、台风结构分区和风速均有关,即A、B类场地、较大风速和台风后眼壁区更易出现近地急流层;台风风剖面的梯度风高度与下垫面类型和平均风速存在着一定关系,A、B类场地的梯度风高度由台风中心向外呈增大趋势,C类场地下的梯度风高度从台风中心向外呈先减小后增大趋势.
Abstract
The wind-resistant design of building structures in the typhoon affected area in the codes is car-ried out by analogy with the non-cyclonic wind field,however,many measured results show that there is a large difference between the typhoon wind profile and the profile of the non-cyclonic wind field,and the in-fluencing factors and changing rules of the typhoon wind profile are still not clear at present.To clearly un-derstand the profile characteristics of typhoons,many measured profile data of several typhoons were used for the analysis.The measured data were categorized by three factors,namely,the underlying surface cate-gories,the typhoon structural partitions,and the wind speed,and the wind profile data of each category were comparatively analyzed,and the study showed that:the low-level jet phenomena in typhoon wind pro-files was related to the underlying surface categories,the typhoon structural partitions,and the wind speed,the low-level jets were more likely to occur at exposure category A,B,larger wind speed,and in the back eyewall region in typhoon;there was a certain relationship between the gradient wind height of the typhoon wind profile and the type of underlying surface and average wind speed.The gradient wind height of expo-sure category A and B showed an increasing trend from the center of the typhoon outward,while the gradi-ent wind height underground of exposure category C showed a decreasing and then increasing trend from the center of the typhoon outward.
关键词
台风/边界层/风剖面特征/低空急流/现场实测Key words
typhoon/boundary layer/wind profile characteristics/low-level jet/field measurement引用本文复制引用
基金项目
国家自然科学基金(52178491)
广东省自然科学基金(2021A1515011769)
深圳市自然科学基金(JCYJ20210324093809023)
出版年
2024
NETL
NSTL
万方数据