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Numerical study of infragravity waves amplification during harbor resonance

机译：港口共振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 excited by bichromatic wave groups are simulated using a fully nonlinear Boussinesq model. Based on an IG wave analysis technique, this study presents a comprehensive investigation on how bound and free IG waves and their relative components change with respect to the amplitudes and wavelengths of incident primary (short) waves under the condition of the lowest four resonant modes. For the given harbor and ranges of wavelength and amplitude of the primary waves studied in this paper, it is shown that the amplitudes of both the bound and free IG waves become more evident when the short wavelengths increase, and the latter are always larger than the former due to resonant amplification. The amplitudes of both the bound and free IG waves change quadratically with the amplitudes of the incident short waves. (C) 2016 Elsevier Ltd. All rights reserved.
机译：使用完全非线性的Boussinesq模型，模拟了由双色波群激发的细长矩形港口内部的次重力（IG）周期振荡。基于IG波分析技术，本研究对在最低的四个共振模态下束缚和自由IG波及其相对分量随入射主（短）波的幅度和波长的变化进行了全面研究。对于本文研究的给定港口和波长范围以及原边波的振幅，结果表明，随着短波长的增加，束缚和自由IG波的振幅变得更明显，而后者总是大于前者由于共振放大。束缚IG波和自由IG波的幅度都随入射短波的幅度呈二次方变化。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Ocean Engineering》 |2016年第1期|90-100|共11页
  • 作者

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

  • 作者单位

    Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China|Jiangsu Univ Sci & Technol, Jiangsu Key Lab Adv Design & Mfg Technol Ship, Zhenjiang 212003, Peoples R China|Hohai Univ, Jiangsu Key Lab Coast Ocean Resources Dev & Envir, Nanjing 210098, Jiangsu, 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, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan;

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

    Harbor resonance; Boussinesq model; Bound infragravity waves; Free infragravity waves; Wave groups;

    机译：港口共振;Boussinesq模型;束缚屈曲波;自由屈曲波;波群;

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