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Research Article

Numerical evaluation of the mechanical behavior of an FPSO mooring system fairleads foundations due to maximum environmental loads

Kauê Louro Martins1, Vinícius Torres Pinto1, Luiz Alberto Oliveira Rocha2, Elizaldo Domingues dos Santos1, Liércio André Isoldi1

1Graduate Program in Ocean Engineering (PPGEO), Federal University of Rio Grande – FURG, Rio Grande, RS, Brazil.                                                                                                                                                               2Graduate Program in Mechanical Engineering, University of Vale do Rio dos Sinos – UNISINOS, Porto Alegre, RS, Brazil

Keywords

Abstract



Mooring System;

Fairleads;

Fairlead Foundations; 

Brackets;

Maximum environmental loads

.

The present work aimed to study the mechanical behavior of the fairlead support brackets of a FPSO (Floating, Production, Storage and Offloading) mooring system located in the Campos Basin (22°58’14’’S, 42°01’36’’O to 20°19’08’’S, 40°20’16’’O) using numerical simulation. For an inextensible anchor line, the maximum stresses from the environmental loading of waves, winds and currents were determined. The stresses acting on the anchor line were applied to the centroid of the fairlead and the reactions to these, generated in the brackets, were applied in the internal region of the hole that receives the fairlead support axis. The brackets are fixed to the side of the hull by 3 vertical and 1 horizontal points. Their initial proposed geometry was based on models currently in operation on platforms P66 and P67 (Petrobras platforms capable of stocking 1.67 mi oil barrels each, with 288 m of length overall, they are designed to anchor at depth of 2200 m). The numerical simulation process was performed using the Mechanical APDL tool of ANSYS software with a computational model composed by three-dimensional (3D) finite elements. The results indicated that for the proposed geometry the mechanical integrity of the brackets is assured, considering that von Mises maximum stresses did not extrapolate the yielding stress limit of the steel. © 2019 MIM Research Group. All rights reserved.

LATEST News


25/12/2019 Most Cited Paper Award: The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the 2019 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM).

25/12/2019 Best Paper Award: The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 2019 Best Paper Award of Research on Engineering Structures and Materials (RESM).


13/11/2019 Data articles as a new type of submision: Editorial Board of our journal have decided to accept a new type of submission: data articles. The focus of these papers is only on data and how it is collected but not on its interpretation and drawn conclusions. For more see News section.


24/5/2019 Collaboration for THERMAM 2019: Editorial Board of our journal and Organizing Committee of 6th International Conference of Thermophysical and Mechanical Properties of Advanced Materials, 8th Rostocker International Conference of Thermophysical Properties for Technical Thermodynamics have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


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LATEST AWARDS


2019 Most Cited Paper Award:

The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the


2019 Best Paper Award:

The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 


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Last Update:

15.02.2020

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