The University of Southampton
University of Southampton Institutional Repository

Research on the coupling effects between ship motions and sloshing

Research on the coupling effects between ship motions and sloshing
Research on the coupling effects between ship motions and sloshing

Floating Liquefied Natural Gas (FLNG) facilities, which are a new type of floating platform, have been developed as an alternative to long pipelines for the exploitation of stranded offshore fields. FLNG vessels will be subjected to very complicated and onerous sea states in some regions and very severe motion responses must be avoided. The vessel motion can induce internal tank sloshing, which can in turn affect the global motion response of the vessel. This coupling response is of great importance for the safe design and operation of FLNG facilities in real sea states. This paper investigates the coupling effect between FLNG roll motions and sloshing. Model tests are carried out for a section of an FLNG vessel containing a tank excited in roll by band-limited white noise waves. During the model tests, the FLNG model is ballasted with fresh water and equivalent steel ballast weights respectively, to quantify the coupling effects due to the internal sloshing. Time histories of the global motions and the internal sloshing oscillations have been measured. Statistical and spectral analyses have been carried out on the measured data. The response amplitude operators are obtained using measured motion spectra divided by the excitation wave spectrum. The influence of the internal sloshing on the global motions has been illustrated through the comparison of the experimental results between the liquid and solid (steel) ballast weight cases. Based on the experimental results, some conclusions regarding the coupling mechanism between FLNG motions and sloshing are drawn.

The American Society of Mechanical Engineers
Zhao, Wenhua
26bfd8b2-ebe7-4f75-be51-e363bb83636c
Yang, Jianmin
25c1532a-4f28-4d72-aef9-f0686616bf95
Tao, Longbin
d2cd2478-aa50-45ff-b24f-f9f2063db024
White, David
a986033d-d26d-4419-a3f3-20dc54efce93
Zhao, Wenhua
26bfd8b2-ebe7-4f75-be51-e363bb83636c
Yang, Jianmin
25c1532a-4f28-4d72-aef9-f0686616bf95
Tao, Longbin
d2cd2478-aa50-45ff-b24f-f9f2063db024
White, David
a986033d-d26d-4419-a3f3-20dc54efce93

Zhao, Wenhua, Yang, Jianmin, Tao, Longbin and White, David (2014) Research on the coupling effects between ship motions and sloshing. In Ocean Engineering. vol. 8B, The American Society of Mechanical Engineers. 7 pp . (doi:10.1115/OMAE2014-23846).

Record type: Conference or Workshop Item (Paper)

Abstract

Floating Liquefied Natural Gas (FLNG) facilities, which are a new type of floating platform, have been developed as an alternative to long pipelines for the exploitation of stranded offshore fields. FLNG vessels will be subjected to very complicated and onerous sea states in some regions and very severe motion responses must be avoided. The vessel motion can induce internal tank sloshing, which can in turn affect the global motion response of the vessel. This coupling response is of great importance for the safe design and operation of FLNG facilities in real sea states. This paper investigates the coupling effect between FLNG roll motions and sloshing. Model tests are carried out for a section of an FLNG vessel containing a tank excited in roll by band-limited white noise waves. During the model tests, the FLNG model is ballasted with fresh water and equivalent steel ballast weights respectively, to quantify the coupling effects due to the internal sloshing. Time histories of the global motions and the internal sloshing oscillations have been measured. Statistical and spectral analyses have been carried out on the measured data. The response amplitude operators are obtained using measured motion spectra divided by the excitation wave spectrum. The influence of the internal sloshing on the global motions has been illustrated through the comparison of the experimental results between the liquid and solid (steel) ballast weight cases. Based on the experimental results, some conclusions regarding the coupling mechanism between FLNG motions and sloshing are drawn.

This record has no associated files available for download.

More information

Published date: 2014
Venue - Dates: ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014, , San Francisco, United States, 2014-06-08 - 2014-06-13

Identifiers

Local EPrints ID: 419759
URI: http://eprints.soton.ac.uk/id/eprint/419759
PURE UUID: 372cc82b-e220-4579-b058-c3f69213f74f
ORCID for David White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 20 Apr 2018 16:30
Last modified: 11 May 2024 01:54

Export record

Altmetrics

Contributors

Author: Wenhua Zhao
Author: Jianmin Yang
Author: Longbin Tao
Author: David White ORCID iD

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.

×