Study on Wave Loads during Steady-State Gap Resonance with Free Heave Motion of Floating Structure

Junliang Gao, Shukai Gong, Zhiwei He, Huabin Shi, Jun Zang, Tao Zou, Xu Bai

Research output: Contribution to journalArticlepeer-review

10 Citations (SciVal)


Fluid resonance may occur in a narrow gap between two side-by-side vessels under wave actions, which can cause significant wave height amplification inside the gap and further induce large wave loads and motion responses of the vessel. Based on an open-sourced computational fluid dynamics (CFD) package, OpenFOAM, the steady-state gap resonance phenomenon formed in between two side-by-side boxes and triggered by the incident regular waves is simulated, where the upriver box keeps fixed and the downriver one heaves freely under wave actions. This article comprehensively investigates the influence of the vertical degree of freedom of the downriver box on the wave loads exerting on both boxes and further reveals how the relative position of the heaving box with respect to the incident wave direction affects the characteristics of wave loads during the steady-state gap resonance. The results show that both the normalized largest wave loads and the dimensionless wavenumber where the normalized largest wave loads occur are significantly affected by both the incident wave heights and the relative position of the heaving box to the incident wave direction.

Original languageEnglish
Article number448
JournalJournal of Marine Science and Engineering
Issue number2
Early online date17 Feb 2023
Publication statusPublished - 28 Feb 2023

Bibliographical note

Funding Information:
This research is financially supported by the National Natural Science Foundation of China (Grant No. 51911530205), the Science and Technology Development Fund of Macau SAR (Grant Nos. 0009/2021/A, SKL-IOTSC(UM)-2021-2023), the Key Laboratory of Port, Waterway and Sedimentation Engineering of MOT (Grant No. YK222001-2), Shandong Provincial Key Laboratory of Ocean Engineering (Grant No. kloe202010), the Key R&D Projects in Guangdong Province (No. 2020B1111500001), and the Qing Lan Project of Jiangsu Universities. The authors also thank the Royal Society (Grant No. IEC\NSFC\181321) for providing partial support for this work.

Data Availability Statement: Data available upon request.
Publisher Copyright:
© 2023 by the authors.


  • gap resonance
  • heave motion
  • OpenFOAM
  • wave forces

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Ocean Engineering


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