Analysis of wave resonant effects in-between offshore vessels arranged side-by-side

Dinoi, Pasquale

doi:10.20868/upm.thesis.43593

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…, z = 0, (2.6) (sometimes referred to as a 'damping lid' model, e.g. Kim, Koo & Hong 2014;Dinoi 2016) withν ≥ 0 within the cylinder as a means of achieving this. We identify three physical settings in which this condition applies.…”

Section: Mathematical Modelmentioning

confidence: 99%

Wave scattering by an array of metamaterial cylinders

2020

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Section: Mathematical Modelmentioning

confidence: 99%

Wave scattering by an array of metamaterial cylinders

2020

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“…This guidance note is applied to offshore LNG floating units employing membrane tanks, obtaining the sloshing loads on the cargo tanks and on the inner hull structure. Dioni [17] studied the sloshing effect in the hydrodynamic interaction between two vessels using numerical simulations. Dumitrache and Deleanu [18] registered the fluid-structure interaction of ballast tanks using numerical simulations with the transient module.…”

Section: Introductionmentioning

confidence: 99%

A Methodology to Assess the Sloshing Effect of Fluid Storage Tanks on the Global Response of FLNG Vessels

Hernández-Ménez

Félix-González

Hernández-Hernández

et al. 2023

JMSE

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The sloshing effect of fluid storage tanks of a Floating Liquefied Natural Gas (FLNG) vessel causes variations in its global motion response. These acceleration and motion alterations can affect the safe performance of the FLNG vessels. The classification societies’ rules are employed to standardize the storage tanks’ configuration of FLNG vessels. Herein, we report a methodology to assess the sloshing effect on the global motion response of an FLNG vessel considering four geometrical arrangements of tanks and different fluid filling fractions. This methodology includes the hydrodynamic effect in operating and storm conditions from the Gulf of Mexico using a return period of 100 years. In addition, our methodology considers the influence of the internal fluid of each tank to estimate the accelerations and motions of the vessel. This methodology can be implemented to estimate the stability of an FLNG vessel under different environmental conditions. Thereby, the naval engineers could choose the best geometrical configuration of the storage tanks for safe behavior of a vessel under different operating and extreme environmental conditions.

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“…Typically, the region surrounding the resonant frequency is most influenced by the viscous effects [14]. Accurate modelling of the motions about the natural periods is important, and several investigations have sought to mitigate the effects of viscous damping by tuning the numerical models [9,10,15,16]. A common approach taken in potential flow investigations is to incorporate an external, frequency-independent damping force that is linearly proportional to the structure's displacement or rotational velocity; some examples include the simulation of side-by-side vessel motions [15] and multiple point absorber WECs integrated into a floating platform [16].…”

Section: Introductionmentioning

confidence: 99%

Mooring Analysis of a Floating OWC Wave Energy Converter

Pols

Gubesch

Abdussamie

et al. 2021

JMSE

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This investigation focuses on the modelling of a floating oscillating water column (FOWC) wave energy converter with a numerical code (ANSYS AQWA) based on potential flow theory. Free-floating motions predicted by the numerical model were validated against experimental data extrapolated from a 1:36 scale model device in regular and irregular sea states. Upon validation, an assessment of the device’s motions when dynamically coupled with a four-line catenary mooring arrangement was conducted at different incident wave angles and sea states ranging from operational to survivable conditions, including the simulation of the failure of a single mooring line. The lack of viscosity in the numerical modelling led to overpredicted motions in the vicinity of the resonant frequencies; however, the addition of an external linear damping coefficient was shown to be an acceptable method of mitigating these discrepancies. The incident wave angle was found to have a limited influence on the magnitudes of heave, pitch, and surge motions. Furthermore, the obtained results indicated that the mooring restoring force is controlled by the forward mooring lines under the tested conditions.

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Analysis of wave resonant effects in-between offshore vessels arranged side-by-side

Cited by 5 publications

References 18 publications

Wave scattering by an array of metamaterial cylinders

Wave scattering by an array of metamaterial cylinders

A Methodology to Assess the Sloshing Effect of Fluid Storage Tanks on the Global Response of FLNG Vessels

Mooring Analysis of a Floating OWC Wave Energy Converter

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