A Coupled, Global/Local Finite Element Methodology to Evaluate the Fatigue Life of Flexible Risers Attached to Floating Platforms for Deepwater Offshore Oil Production

Author:

Alves Monique de Carvalho1,Corrêa Fabrício Nogueira1,de Sousa José Renato Mendes2ORCID,Jacob Breno Pinheiro1

Affiliation:

1. LAMCSO—Laboratory of Computer Methods and Offshore Systems, Civil Engineering Department, COPPE/UFRJ—Post Graduate Institute of the Federal University of Rio de Janeiro, Avenida Pedro Calmon, S/N, Cidade Universitária, Ilha do Fundão, Rio de Janeiro 21941-596, RJ, Brazil

2. LACEO—Laboratory of Analysis and Reliability of Offshore Structures, Civil Engineering Department, COPPE/UFRJ—Post Graduate Institute of the Federal University of Rio de Janeiro, Avenida Pedro Calmon, S/N, Cidade Universitária, Ilha do Fundão, Rio de Janeiro 21941-596, RJ, Brazil

Abstract

This study introduces a Finite Element (FE) hybrid methodology for analyzing deepwater offshore oil and gas floating production systems. In these systems, flexible risers convey the production and are connected to a balcony on one side of the platform. The proposed methodology couples, in a cost-effective manner, the hydrodynamic model of the platform with the FE model that represents the risers and the mooring lines, considering all nonlinear dynamic interactions. The results obtained and the associated computational performance are then compared with those from traditional uncoupled analyses, which may present inaccurate results for deepwater scenarios, and from fully coupled analyses that may demand high computational costs. Moreover, particular attention is dedicated to integrating global and local stress analyses to calculate the fatigue resistance of the flexible riser. The results demonstrate that the coupled global analyses adequately capture the asymmetric behavior due to all risers being connected to one of the sides of the platform, thus resulting in a more accurate distribution of fatigue damage when compared to the uncoupled methodology. Also, fatigue life is significantly affected by adequately considering the coupling effects.

Funder

CNPq

CAPES

Publisher

MDPI AG

Reference38 articles.

1. (2023, December 02). Pré-Sal Bacia de Santos. Available online: https://comunicabaciadesantos.petrobras.com.br/pre-sal-bacia-de-santos.

2. Offshore Magazine (2022, July 21). Harsh Environments, Riser Arrays Drive Turret Design Evolution. Available online: https://www.offshore-mag.com/production/article/16763772/harsh-environments-riser-arrays-drive-turret-design-evolution.

3. API (2014). API RP 17B: Recommended Practice for Flexible Pipe, American Petroleum Institute. [5th ed.].

4. A Theoretical Approach to Predict the Fatigue Life of Flexible Pipes;Sagrilo;J. Appl. Math.,2012

5. Tensile Armor Wires Submitted to Slow Strain Rate Tests in a Corrosive Environment and Cathodic Protection: A Comparison Between Two Different Microstructures;Tagliari;Mater. Res.,2019

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3