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A hydroelasticity analysis of a damaged ship based on a two-way coupled CFD-DMB method

A hydroelasticity analysis of a damaged ship based on a two-way coupled CFD-DMB method
A hydroelasticity analysis of a damaged ship based on a two-way coupled CFD-DMB method
This study focuses on the numerical investigation of the hull girder loads on a flexible containership S175 with intact and damaged conditions advancing in regular head waves. In this study, a two-way coupled fluid-structure interactions framework is applied, in which the interactions between the flooding water inside the damaged tanks and wave fields are modelled by a Computational Fluid Dynamics toolbox OpenFOAM. The structural deformation is predicted using a multibody solver MBDyn. Hydroelasticity computations are performed for two different damage scenarios. The numerical results obtained show that the damaged ship experiences less vertical motions but greater global wave loads than the intact ship. It is also demonstrated that ship damages greatly influence the hull girder vertical bending moments (VBMs), while still water VBM is sensitive to the added weight from flooding water. In specific ship-damage conditions, local hogging moments at several amidship sections are found to exceed the limits specified by international regulations. Therefore, a new safety factor is recommended to avoid hogging moments of damaged ships remain below the limiting value. The results can also be used to determine whether the damaged ship will experience secondary damage due to hydroelastic response, helping with the design of future conventional ships.
Computational fluid dynamics, Damaged ships, Fluid structure interaction, Ship hydroelasticity, Ship longitudinal strength analysis
0029-8018
Wei, Yujia
1334d051-7267-4469-8146-4b9d95a44776
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909
Wei, Yujia
1334d051-7267-4469-8146-4b9d95a44776
Incecik, Atilla
25a12ee2-7ba6-47cf-af5d-a79de4c6a2c4
Tezdogan, Tahsin
7e7328e2-4185-4052-8e9a-53fd81c98909

Wei, Yujia, Incecik, Atilla and Tezdogan, Tahsin (2023) A hydroelasticity analysis of a damaged ship based on a two-way coupled CFD-DMB method. Ocean Engineering, 274, [114075]. (doi:10.1016/j.oceaneng.2023.114075).

Record type: Article

Abstract

This study focuses on the numerical investigation of the hull girder loads on a flexible containership S175 with intact and damaged conditions advancing in regular head waves. In this study, a two-way coupled fluid-structure interactions framework is applied, in which the interactions between the flooding water inside the damaged tanks and wave fields are modelled by a Computational Fluid Dynamics toolbox OpenFOAM. The structural deformation is predicted using a multibody solver MBDyn. Hydroelasticity computations are performed for two different damage scenarios. The numerical results obtained show that the damaged ship experiences less vertical motions but greater global wave loads than the intact ship. It is also demonstrated that ship damages greatly influence the hull girder vertical bending moments (VBMs), while still water VBM is sensitive to the added weight from flooding water. In specific ship-damage conditions, local hogging moments at several amidship sections are found to exceed the limits specified by international regulations. Therefore, a new safety factor is recommended to avoid hogging moments of damaged ships remain below the limiting value. The results can also be used to determine whether the damaged ship will experience secondary damage due to hydroelastic response, helping with the design of future conventional ships.

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Accepted/In Press date: 26 February 2023
Published date: 15 April 2023
Additional Information: Funding Information: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Results were obtained using the ARCHIE-WeSt High Performance Computer (www.archie-west.ac.uk) based at the University of Strathclyde. Publisher Copyright: © 2023 The Authors
Keywords: Computational fluid dynamics, Damaged ships, Fluid structure interaction, Ship hydroelasticity, Ship longitudinal strength analysis

Identifiers

Local EPrints ID: 475680
URI: http://eprints.soton.ac.uk/id/eprint/475680
ISSN: 0029-8018
PURE UUID: 40e87c35-f948-4c71-854f-f87fd2f4ff9f
ORCID for Tahsin Tezdogan: ORCID iD orcid.org/0000-0002-7032-3038

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Date deposited: 24 Mar 2023 17:35
Last modified: 17 Mar 2024 04:18

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Contributors

Author: Yujia Wei
Author: Atilla Incecik
Author: Tahsin Tezdogan ORCID iD

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