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Gap Resonance Between a Stationary Box and a Vertical Wall Induced by Transient Focused Wave Groups
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Gap Resonance Between a Stationary Box and a Vertical Wall Induced by Transient Focused Wave Groups
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Journal Article
Gap Resonance Between a Stationary Box and a Vertical Wall Induced by Transient Focused Wave Groups
2025
Overview
This paper explores the phenomenon of fluid resonance occurring within a narrow gap between a vessel and a vertical wharf, taking ships berthing in front of a gravity wharf as the research background. Using the open-source software OpenFOAM®, a two-dimensional viscous-flow numerical wave flume was developed to simulate the fluid resonant motions induced by transient focused wave groups with different spectral peak periods and wave amplitudes. The results indicate that for all the incident focused wave amplitudes considered, the amplitudes of the free surface elevation in the gap, horizontal wave force and moment all exhibit a bimodal variation trend with increasing spectral peak period. The peak values of the above amplitude-period curve appear near the resonant period of the first and second harmonic components of the free surface elevation. However, the variation in the vertical wave force versus the spectral peak period presents different patterns. In addition, the first- to fourth-order harmonic components in the wave surface and forces are further examined via the four-phase combination method. The results show that the first- to second-order harmonic components play a dominant role in the overall amplitude.
