Study on Transient Gap Resonance with Consideration of the Motion of Floating Body

Jun Liang Gao, Jing Lyu, Jing Hua Wang, Jian Zhang, Qian Liu, Jun Zang, Tao Zou

Research output: Contribution to journalArticlepeer-review

33 Citations (SciVal)

Abstract

In this paper, the transient fluid resonance phenomenon inside a narrow gap between two adjacent boxes excited by the incident focused waves with various spectral peak periods and focused wave amplitudes is simulated by utilizing the open-sourced computational fluid dynamics software, OpenFOAM. The weather-side box is allowed to heave freely under the action of waves, and the lee-side box keeps fixed. This paper mainly focuses on how both the spectral peak period and the focused wave amplitude affect the free-surface amplification inside the gap, the motion of the weather-side box, and the wave loads (including the vertical and the horizontal wave forces) acting on both boxes. For comparison, another two-box system with both boxes fixed is also considered as a control group. It is found that the motion of the weather-side box significantly changes the characteristics of the transient gap resonance, and it would cause that the fluid resonant period becomes 1.4–1.6 times that of the two-box system with both boxes fixed. All the concerned physical quantities (i.e., the free-surface amplification in the gap, the motion of the weather-side box, the wave loads) are found to closely depend on both the spectral peak period and the focused wave amplitude.

Original languageEnglish
Pages (from-to)994-1006
Number of pages13
JournalChina Ocean Engineering
Volume36
Issue number6
Early online date31 Dec 2022
DOIs
Publication statusPublished - 19 Jan 2023

Keywords

  • focused waves
  • free-surface amplification
  • heave motion
  • OpenFOAM
  • transient gap resonance
  • wave loads

ASJC Scopus subject areas

  • Oceanography
  • Renewable Energy, Sustainability and the Environment
  • Ocean Engineering
  • Mechanical Engineering

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