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Numerical investigation of infragravity wave amplifications during harbor oscillations influenced by variable offshore topography

机译：可变近海地形影响港口振荡过程中重力波放大的数值研究

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摘要

The infragravity (IG) period oscillations inside an elongated rectangular harbor near the offshore fringing reef induced by normal-incident bichromatic short wave groups are simulated using a fully nonlinear Boussinesq model, FUNWAVE 2.0. Based on an IG wave separation procedure, this article presents a systematical investigation on how the maximum IG period component amplitude, the bound and free IG waves, and their relative components inside the harbor change with respect to the plane reef-face slope and the incident short wave amplitude under the condition of the 2nd to the 5th modes. For the given harbor and the ranges of the reef-face slope and the incident short wave amplitude studied in this paper, it is shown that both the maximum IG period component amplitude and the free IG wave component amplitude inside the harbor fluctuate widely with the reef-face slope, and their changing trends with the reef-face slope are almost identical with each other, while the bound IG waves inside the harbor seem insensitive to it. Both the maximum IG period component amplitude and those of the bound and free IG standing waves inside the harbor change cubically with the incident short wave amplitude.
机译：使用完全非线性的Boussinesq模型FUNWAVE 2.0，模拟了由正常入射双色短波群引起的近海边缘礁附近的细长矩形海港内的引力（IG）周期振荡。本文基于IG波分离程序，对最大IG周期分量振幅，束缚和自由IG波及其在港内的相对分量相对于平面礁石面坡度和入射角如何变化进行了系统的研究。在第二至第五模式下的短波振幅。对于给定的港口以及本文研究的礁石面坡度范围和入射短波振幅，研究表明，港口内的最大IG周期分量振幅和自由IG波分量振幅均随礁石波动较大。面坡度以及它们与礁石面坡度的变化趋势几乎彼此相同，而港口内的束缚IG波似乎对此不敏感。最大IG周期分量振幅以及港口内束缚和自由IG驻波的振幅都随入射短波振幅而立方变化。

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  • 来源
    《Ocean Dynamics》 |2017年第9期|1151-1162|共12页
  • 作者

    Gao Junliang; Ji Chunyan; Ma Xiaojian; Liu Yingyi; Gaidai Oleg;

  • 作者单位

    Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China|Hohai Univ, Jiangsu Key Lab Coast Ocean Resources Dev & Envir, Nanjing 210098, Jiangsu, Peoples R China|Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China;

    Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China;

    Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China;

    Kyushu Univ, Res Inst Appl Mech, Kasuga, Fukuoka 8168580, Japan;

    Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Harbor oscillations; Topography; Bound infragravity waves; Free infragravity waves; Wave groups; FUNWAVE 2.0 model;

    机译：港湾振荡;地形;束缚屈曲波;自由屈曲波;波群;FUNWAVE 2.0模型;

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