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

Yang Yini; Tao Aifeng; Cao Liwei; Fan Jun; Wang Gang

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Yang Yini，Tao Aifeng，Cao Liwei, et al. A study on bimodal spectral patterns based on fixed-point observation data in Jiangsu sea area[J]. Haiyang Xuebao，2024, 46(x)：1–10

Citation:

Yang Yini，Tao Aifeng，Cao Liwei, et al. A study on bimodal spectral patterns based on fixed-point observation data in Jiangsu sea area[J]. Haiyang Xuebao，2024, 46(x)：1–10

Citation:

Yang Yini，Tao Aifeng，Cao Liwei, et al. A study on bimodal spectral patterns based on fixed-point observation data in Jiangsu sea area[J]. Haiyang Xuebao，2024, 46(x)：1–10

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

Yang Yini^{1, 2
,},
Tao Aifeng^{1, 2
,
,},
Cao Liwei^{1, 2},
Fan Jun^{1, 2},
Wang Gang^{1, 2}

1.
Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing 210024, China
2.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China

Received Date: 2023-01-01
Available Online: 2024-03-05

Abstract

Abstract

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.
- Jiangsu Sea Area,
- bimodal spectrum,
- Ochi-Hubble six parameter spectrum,
- Torsethaugen bimodal spectrum,
- bimodal JONSWAP fitting spectrum

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References(22)

References

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