Vessel/mooring/riser coupled dynamic analysis of a turret-moored FPSO compared with OTRC experiment

Kim, M.H.; Koo, Bonjun; Mercier, Richard; Ward, E.G.

doi:10.1016/j.oceaneng.2004.12.013

Cited by 118 publications

(45 citation statements)

References 5 publications

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“…The results are first validated against a published numerical simulation and its corresponding experiment conducted by Kim et al [5]. The same model is then later compared with two statically equivalent numerical simulations, a quasi-static analysis and a linear spring system.…”

Section: Introductionmentioning

confidence: 95%

“…The AQWA model attempts to reproduce as close as possible the same model as given in [5], in which the main particulars of the FPSO, its mooring systems as well as its corresponding hydrodynamic coefficients are also referred to. The arrangement of the mooring lines is shown in Fig.…”

Section: Fpso Model and Environmental Conditionsmentioning

confidence: 99%

“…All 12 lines are modelled in AQWA. In the published work [5], computation of the second order radiation/diffraction for the hull was carried out using Newman's approximation in order to avoid the more computationally expensive QTF method. The former can be reasonably applied when the natural frequency of the floating system is small and the slope of the QTFs near the diagonal is not large.…”

Section: Fpso Model and Environmental Conditionsmentioning

confidence: 99%

“…A 100-year storm condition at the Gulf of Mexico was simulated, the details of which can be found in [5]. For the wind and current force considerations, reference was made to OCIMF [6].…”

Section: Model Validationmentioning

confidence: 99%

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Prediction of Deepwater FPSO responses using different numerical analysis methods

Guan

Osman

2018

E3S Web Conf.

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Abstract. The limitations of existing wave basins present a significant challenge when modelling offshore deepwater systems, particularly due to the basin's relatively shallow depth. Numerical simulation thus becomes valuable in predicting its behaviour during operation at sea. The coupled dynamic analysis is preferred over the traditional quasi-static method, as the former enables the inclusion of damping and added mass properties of the complete mooring line system, which becomes increasingly prominent at greater water depths. This paper investigates the motions and mooring line tensions of a turret moored Floating Production Storage Offloading (FPSO) platform using three numerical models, i.e. a dynamic system, quasi-static system and linear spring system subjected to unidirectional random wave condition. Analysis is carried out using a commercial software AQWA. The first two numerical models utilise a complete system of the same setup and configuration, while the linear spring system substitutes the mooring lines with equivalent linear springs and attempts to match the total mooring line restoring forces with that of the coupled dynamic analysis. The study demonstrates the significance of coupled dynamic analysis on the responses of an FPSO in deepwater. The numerical model of the FPSO is validated against the results of a published work.

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Section: Introductionmentioning

confidence: 95%

Section: Fpso Model and Environmental Conditionsmentioning

confidence: 99%

Section: Fpso Model and Environmental Conditionsmentioning

confidence: 99%

“…A 100-year storm condition at the Gulf of Mexico was simulated, the details of which can be found in [5]. For the wind and current force considerations, reference was made to OCIMF [6].…”

Section: Model Validationmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of Deepwater FPSO responses using different numerical analysis methods

Guan

Osman

2018

E3S Web Conf.

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“…Wichers and Devlin (2001) also conducted a fully coupled time-domain analysis for the dynamics of a turret-moored floating production storage offloading (FPSO), and they concluded that coupling effects are significant especially when a loop current exists. Kim et al (2005) developed a numerical tool for fully coupled time-domain analysis method and validated the simulation results through comparison with the results of an experiment performed by Offshore Technology Research Center.…”

Section: Introductionmentioning

confidence: 99%

Prescreening of Environmental Conditions for Prediction of Severe Operation Condition of Offshore Structures

Lim¹,

Kim²,

Kim³

2015

Journal of Advanced Research in Ocean Engineering

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Offshore structures might encounter several environmental and operating conditions during their lifetime of several decades. In order to predict the dynamic behavior of offshore structures, several simulation cases should be considered to deal with all the combinations of ocean environments and operating conditions. Because a sophisticated time-domain coupled dynamic analysis requires an extremely large amount of computational time to handle all the possible cases, an efficient preliminary process to prescreen the probability of severe environmental conditions can be helpful in downsizing the number of simulation cases and computational effort. In this study, a prescreening procedure to reduce the number of environmental conditions for dynamic analyses of offshore structures is proposed. For the efficiency of the procedure, frequency-domain theories were adopted to estimate the platform offset, using quasi-static analyses in line tension prediction. The results were validated by comparing with those of dynamic analysis coupled between platform and mooring lines, and reasonable agreement was observed. In addition, the characteristics of environmental conditions classified to be severe to the system were investigated through the application of the developed prescreening scheme to several actual environmental conditions.

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Hydrodynamic Aspects of Turret-Moored FPSOs

Nair¹,

Vijayakumar

Ananthakrishnan

2019

Lecture Notes in Civil Engineering

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Vessel/mooring/riser coupled dynamic analysis of a turret-moored FPSO compared with OTRC experiment

Cited by 118 publications

References 5 publications

Prediction of Deepwater FPSO responses using different numerical analysis methods

Prediction of Deepwater FPSO responses using different numerical analysis methods

Prescreening of Environmental Conditions for Prediction of Severe Operation Condition of Offshore Structures

Hydrodynamic Aspects of Turret-Moored FPSOs

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