[1]李利孝,黄羽晴,陈上鑫,等.相干结构对强台风湍流特性的影响[J].深圳大学学报理工版,2022,39(6):629-636.[doi:10.3724/SP.J.1249.2022.06629]
 LI Lixiao,HUANG Yuqing,CHEN Shangxin,et al.Influence of coherent structures on the turbulence characteristics of strong typhoon[J].Journal of Shenzhen University Science and Engineering,2022,39(6):629-636.[doi:10.3724/SP.J.1249.2022.06629]
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相干结构对强台风湍流特性的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第39卷
期数:
2022年第6期
页码:
629-636
栏目:
土木与建筑工程
出版日期:
2022-11-15

文章信息/Info

Title:
Influence of coherent structures on the turbulence characteristics of strong typhoon
文章编号:
202206003
作者:
李利孝黄羽晴陈上鑫黄希桂肖仪清陈贤川
1)深圳大学土木与交通工程学院,广东深圳 518060;2)深圳大学城市智慧交通与安全运维研究院,广东深圳 518060; 3)哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳 518055
Author(s):
LI Lixiao HUANG Yuqing CHEN Shangxin HUANG Xigui XIAO Yiqing CHEN Xianchuan
1) College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China 2) Guangdong Key Laboratory of Durability in Coastal Civil Engineering, Shenzhen 518060, Guangdong Province, P.R.China 3) College of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, Guangdong Province, P.R.China
关键词:
防灾减灾防护工程台风相干结构风特性非平稳性非高斯性
Keywords:
disaster prevention and mitigation protection engineering typhoon coherent structure wind characteristics nonstationary non-Gaussianity
分类号:
TU312.1
DOI:
10.3724/SP.J.1249.2022.06629
文献标志码:
A
摘要:
为了探究实测台风眼壁强风区和风眼区风速非平稳性的形成机理,以0814号强台风“黑格比”实测数据为研究对象,用离散小波变换结合假设检验的方法对风场的相干结构进行辨识与提取,探讨相干结构对风速非平稳性、非高斯性以及风场湍流特性参数的影响规律.研究结果表明:对于0814号强台风“黑格比”,相干结构是造成风场脉动风速具有非平稳性和非高斯性的关键因素,提取相干结构后非平稳样本的非平稳性和非高斯性显著减弱;相干结构对各湍流参数的平均贡献介于6.42%~32.4%;相干结构持时占样本时长的比值平均为10.6%,对湍动能贡献占比最高达40.5%,相干结构具有“短持时,高含能”的特点,是造成湍流参数值异常偏大的根本原因.研究可为非平稳风作用下结构精细化抗风设计提供参考.
Abstract:
In order to investigate the formation mechanism of the nonstationary winds in the eye wall regions and eye region of a typhoon, taking the measured data of 0814 strong typhoon Hagupit as the research object, firstly, we identify and extract the coherent structures of field measured wind speeds by discrete wavelet transform combined with hypothesis testing, then, analyz the influence of the coherent structures on the non-stationarity and non-Gaussianity of the wind speeds and study the influence of the coherent structure on the wind turbulence characteristics. The results show that for the typhoon Hagupit process of 0814, the coherent structure is the main reason that leads to the non-stationary and non-Gaussian fluctuating winds in the typhoon field, and with the coherent structures being exacted from the original winds, the non-stationarity and non-Gaussianity of the nonstationary wind samples are significantly weakened. The average contribution of the coherent structure to the turbulence parameters ranges from 6.42% to 32.4%. The duration of the coherent structure is about 10.6% of the sample time, however, its contribution to turbulent kinetic energy is as high as 40.5%. The coherent structure has the characteristics of "short duration, high energy content", which is the cause of the abnormally large turbulence parameter value. This study can provide a reference for the accurate wind resistance design of structures under non-stationary wind action.

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更新日期/Last Update: 2022-11-30