The University of Southampton
University of Southampton Institutional Repository

Selection of appropriate numerical models for modelling the stresses in mooring chains

Selection of appropriate numerical models for modelling the stresses in mooring chains
Selection of appropriate numerical models for modelling the stresses in mooring chains
Mooring chains are key components for floating platforms. The failure of these components can be catastrophic in terms of the economic and environmental impacts, especially when dealing with the potential failure of FPSOs. However, mooring failures have been regularly occurring much earlier in their service lives than expected, with almost 50% of the reported failures happening in the first 3 years of 20-year design lives. Although the operating stresses play a major role in determining the failure mechanisms of mooring chains, the methods of predicting the operating stresses in mooring chains vary in the openly available literature, and the accuracy of these different numerical methods for predicting types of mooring failures is unknown. There is currently little evidence provided for when one model is appropriate for a particular scenario. Therefore, this paper benchmarks the different available methods for modelling mooring chains under tension, including FE models found in the literature. These models are calibrated and verified against previous studies and compared with experiments and a developed FE explicit model. There is a significant difference in the way that the numerical models behave, which are discussed in terms of their applicability and limitations in modelling mooring chains. The results of this study show that the explicit modelling approach should be utilised for accurate assessment of mooring lines, as it provides the most realistic response, with a substantial reduction in the computational cost and without any convergence problems.
Benchmarking, Contact stresses, Finite element method (FEM), Mooring line failures
0951-8339
Gemilang, Gilang Muhammad
8bf58690-0ac6-4dfb-9772-e90dbb33befb
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28
Gemilang, Gilang Muhammad
8bf58690-0ac6-4dfb-9772-e90dbb33befb
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Sobey, Adam
e850606f-aa79-4c99-8682-2cfffda3cd28

Gemilang, Gilang Muhammad, Reed, Philippa and Sobey, Adam (2021) Selection of appropriate numerical models for modelling the stresses in mooring chains. Marine Structures, 75, [102864]. (doi:10.1016/j.marstruc.2020.102864).

Record type: Article

Abstract

Mooring chains are key components for floating platforms. The failure of these components can be catastrophic in terms of the economic and environmental impacts, especially when dealing with the potential failure of FPSOs. However, mooring failures have been regularly occurring much earlier in their service lives than expected, with almost 50% of the reported failures happening in the first 3 years of 20-year design lives. Although the operating stresses play a major role in determining the failure mechanisms of mooring chains, the methods of predicting the operating stresses in mooring chains vary in the openly available literature, and the accuracy of these different numerical methods for predicting types of mooring failures is unknown. There is currently little evidence provided for when one model is appropriate for a particular scenario. Therefore, this paper benchmarks the different available methods for modelling mooring chains under tension, including FE models found in the literature. These models are calibrated and verified against previous studies and compared with experiments and a developed FE explicit model. There is a significant difference in the way that the numerical models behave, which are discussed in terms of their applicability and limitations in modelling mooring chains. The results of this study show that the explicit modelling approach should be utilised for accurate assessment of mooring lines, as it provides the most realistic response, with a substantial reduction in the computational cost and without any convergence problems.

Text
Manuscript of MASTR-D-20-00115R1 - Accepted Manuscript
Restricted to Repository staff only until 29 September 2021.
Request a copy

More information

Accepted/In Press date: 8 September 2020
e-pub ahead of print date: 29 September 2020
Published date: January 2021
Keywords: Benchmarking, Contact stresses, Finite element method (FEM), Mooring line failures

Identifiers

Local EPrints ID: 445556
URI: http://eprints.soton.ac.uk/id/eprint/445556
ISSN: 0951-8339
PURE UUID: 19f2c4ec-517f-44f0-8be9-fcad715678eb
ORCID for Gilang Muhammad Gemilang: ORCID iD orcid.org/0000-0001-9641-9495
ORCID for Philippa Reed: ORCID iD orcid.org/0000-0002-2258-0347
ORCID for Adam Sobey: ORCID iD orcid.org/0000-0001-6880-8338

Catalogue record

Date deposited: 16 Dec 2020 17:31
Last modified: 18 Feb 2021 17:30

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×