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Equilibrium States with Finite Amplitudes at Exactly and Nearly Class-I Bragg Resonances

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  • Dali Xu
  • Jingyu Zhang
  • Hongsheng Zhang
  • Hang Xu

Abstract

The exactly and nearly class-I Bragg resonances of strongly nonlinear waves are studied analytically by the homotopy analysis method. Two types of equilibrium states with time-independent wave spectra and different energy distributions are obtained. Effects of the incident wave height, the seabed height, and the frequency detuning on resonant waves are investigated. Bifurcation points of the equilibrium states are found and tend to greater value of relatively incident wave height for a steeper wave. The wave steepness of the whole wave system grows linearly with the seabed height. Meanwhile, the resonant peak can shift to up or down side when the near resonance is considered. This work provides us a deeper understanding on class-I Bragg resonance and enlightens further studies of higher-order wave-bottom interactions.

Suggested Citation

  • Dali Xu & Jingyu Zhang & Hongsheng Zhang & Hang Xu, 2021. "Equilibrium States with Finite Amplitudes at Exactly and Nearly Class-I Bragg Resonances," Journal of Mathematics, Hindawi, vol. 2021, pages 1-13, May.
    • Handle: RePEc:hin:jjmath:9986114
    DOI: 10.1155/2021/9986114
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