Modeling of fluid resonance in-between two floating structures in close proximity

Yao, Chi; Dong, Wencai

doi:10.1631/jzus.a1500017

Cited by 8 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequently, this method has been recognized by many scholars. Yao and Dong [33] also studied the wave elevation in the gap by applying a dissipating parameter and performed a sensitive study of the dissipating parameter. Research conducted by Zhao et al [34] proved that potential flow can accurately and highly efficiently simulate fluid sloshing in the time domain by using the artificial damping model.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

Chen

Guo

Wang

et al. 2021

JMSE

View full text Add to dashboard Cite

Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consists of multiple modules with narrow gaps in which hydrodynamic interactions play a non-neglected role. This study considers a numerical model consisting of several rectangular modules to study the hydrodynamics and dynamics of the multi-module floating system subjected to the waves. Based on ANSYS-AQWA, both frequency-domain and time-domain simulations are performed to analyze the complex multi-body hydrodynamic interactions by introducing artificial damping on the gap surfaces. Parametric studies are carried out to investigate the effects of the gap width, shielding effects of the multi-body system, artificial damping ratio on the gap surface, and the dependency of the hydrodynamic interaction effect on wave headings is clarified. Based on the results, it is found that the numerical analysis based on the potential flow theory with artificial damping introduced can produce accurate results for the normal wave period range. In addition, the effects of artificial damping on the dynamics and connector loads are investigated by using a simplified RMFC model. For the case of adding an artificial damping ratio of 0.2, the relative heave and pitch motions are found to be reduced by 33% and 50%, respectively. In addition, the maximum cable and fender forces are found to be reduced by 50%, compared with the case without viscosity correction.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

Chen

Guo

Wang

et al. 2021

JMSE

View full text Add to dashboard Cite

show abstract

“…One of the popular solutions to the flow separation problem is the introduction of an artificial damping zone imposed on the water free surface. Yao and Dong [10] added an artificial damping surface and successfully overcame the over-estimation in their investigation of the gap resonance between two barges. An alternative approach is the application of computational fluid dynamics (CFD) technique, which can fully simulate the flow separation at sharp corners.…”

Section: Introductionmentioning

confidence: 99%

Resonant waves in the gap between two advancing barges

Yuan

et al. 2019

European Journal of Mechanics - B/Fluids

View full text Add to dashboard Cite

The gap resonance between two advancing rectangular barges in side-by-side arrangement is investigated using a 3-D Rankine source method. A modified Sommerfeld radiation condition accounting for Doppler shift is applied for the low forward speed problem when the scattered waves could propagate ahead of the barges. Numerical studies are conducted to investigate various factors which will influence the wave resonance in the narrow gap with particular attention paid on the forward speed effect and its coupling effects with gap width and draft. It is found that in the absence of forward speed, the trapped water surface oscillates like a flexible plate and the wave flow within the gap behaves like a standing wave. When the two barges are travelling ahead, the resonant wave patterns within the gap are reshaped. Additionally, the resonant frequencies shift to lower value and are compressed within a narrow range. Gap resonances are reduced by the augment of gap width. The effect of draft is shown to be associated with resonant modes. Draft effect becomes less pronounced at higher order resonant modes. Furthermore, both gap width and draft effects on gap resonance are found to be independent from forward speed.

show abstract

“…The major works in this respect are enumerated as follows. Chen [2] first proposed a GF 1 _V 1 to eliminate the numerical resonance phenomena in multi-body hydrodynamics, and a similar work was followed [5]. Then, a GF 2 _V 1 was developed to analyze the time-harmonic ship waves [4].…”

Section: Introductionmentioning

confidence: 99%

A Time-Domain Green’s Function for Interaction between Water Waves and Floating Bodies with Viscous Dissipation Effects

Guo

Qin

2018

Water

View full text Add to dashboard Cite

Abstract:A novel time-domain Green's function is developed for dealing with two-dimensional interaction between water waves and floating bodies with considering viscous dissipation effects based on the "fairly perfect fluid" model. In the Green's function, the temporal (lower order viscosity coefficient term) and spatial (higher order viscosity coefficient term) viscous dissipation effects are fully considered. As compared to the methods based on the existing time-domain Green's functions that could not account for the spatial viscous dissipation, the method based on the new time-domain Green's function can give much better numerical results and overcome instability problems related to the existing Green's function, according to the numerical tests and comparison with CFD modeling data for a few cases related to floating bodies with a flare angle.

show abstract

Modeling of fluid resonance in-between two floating structures in close proximity

Cited by 8 publications

References 14 publications

Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps

Resonant waves in the gap between two advancing barges

A Time-Domain Green’s Function for Interaction between Water Waves and Floating Bodies with Viscous Dissipation Effects

Contact Info

Product

Resources

About