基于江苏海域定点观测资料的双峰谱谱型研究  

A study on bimodal spectral patterns based on fixed-point observation data in Jiangsu sea area

作　　者：杨伊妮 陶爱峰[1,2] 曹力玮 范骏[1,2] 王岗[1,2] Yang Yini;Tao Aifeng;Cao Liwei;Fan Jun;Wang Gang(Key Laboratory of Ministry of Education for Coastal Disaster and Protection,Hohai University,Nanjing 210024,China;College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210024,China;PowerChina Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]河海大学海岸灾害及防护教育部重点试验室,江苏南京210024 [2]河海大学港口海岸与近海工程学院,江苏南京210024 [3]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《海洋学报》2024年第2期107-116,共10页

基　　金：国家自然科学基金面上项目(52271271);国家重点研发项目(2023YFC3007900);江苏省自然科学基金杰出青年基金项目(BK20220082);水利部重大科技项目(SKS-2022025)。

摘　　要：江苏海域作为全国海上风电重点建设海域,走向远海是未来发展的主趋势,外海开敞海域涌浪成分较多,海浪谱往往以双峰谱的形式出现,因此双峰谱海浪的谱型特征需要进一步深入研究,为海上施工提供参考依据。基于浮标测站2018年全年观测数据,经过异常值检验、双峰谱识别后得到1 223笔双峰谱数据,进而研究江苏海域波浪双峰谱谱型特征,对比不同典型双峰谱谱型并展开实测双峰谱的拟合,提出了修正谱宽参量,探究了修正系数、峰升高因子、谱宽参量间的依赖关系,得到了双峰谱拟合谱型表达式。结果表明:基于北大西洋海域提出Ochi-Hubble谱系及基于挪威海域提出的Torsethaugen谱并不适用于江苏海域双峰谱谱型,本文提出的双峰JONSWAP拟合谱具有自适应性,可以科学合理地描述江苏海域双峰谱谱型,并推广应用于不同风场、地形条件的海域中。As a national key construction sea area,the trend of offshore wind power construction in the Jiangsu sea area towards the open sea is the main trend of future development.The open sea areas have more surge components,and the wave spectrum often appears in the form of bimodal spectrum.Therefore,the wave characteristics of bimodal spectrum waves need further in-depth research to provide reference basis for offshore construction.Based on the observation data of the buoy station throughout 2018,1223 bimodal spectral data were obtained through outlier testing and bimodal spectral identification.The bimodal spectral characteristics of waves in the Jiangsu sea area were studied,and different typical bimodal spectral types were compared.The fitting of the measured bimodal spectra was carried out,and the corrected spectral width parameters were proposed.The dependency relationship between the correction coefficient,peak rise factor,and spectral width parameters was explored,and the bimodal spectral fitting expression was obtained.The results indicate that the Ochi-Hubble spectrum proposed based on the North Atlantic sea area and the Torsethaugen spectrum proposed based on the Norwegian sea area are not applicable to the bimodal spectrum type in the Jiangsu sea area.The bimodal JONSWAP fitting spectrum proposed in this paper has adaptability and can scientifically and reasonably describe the bimodal spectrum in the Jiangsu sea area,and is widely applied to different wind and terrain conditions in the sea area.

关 键 词：江苏海域 双峰谱 Ochi-Hubble六参数谱 Torsethaugen双峰谱 双峰JONSWAP拟合谱 

分 类 号：P752[天文地球—海洋科学]