A Delay Vector Variance based marker for an output-only assessment of structural changes in tension leg platforms

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dc.contributor.author Jaksic, Vesna
dc.contributor.author Wright, Christopher S.
dc.contributor.author Mandic, D. P.
dc.contributor.author Murphy, Jimmy
dc.contributor.author Pakrashi, Vikram
dc.date.accessioned 2016-05-19T11:24:14Z
dc.date.available 2016-05-19T11:24:14Z
dc.date.issued 2015-07
dc.identifier.citation Jaksic V., Wright, C., Mandic, D. P., Murphy, J. and Pakrashi, V. (2015) 'A Delay Vector Variance based marker for an output-only assessment of structural changes in tension leg platforms', Journal of Physics: Conference Series, 628(1), 012059. doi: 10.1088/1742-6596/628/1/012059 en
dc.identifier.volume 628 en
dc.identifier.issued 1 en
dc.identifier.startpage 012059 en
dc.identifier.issn 1742-6596
dc.identifier.uri http://hdl.handle.net/10468/2587
dc.identifier.doi 10.1088/1742-6596/628/1/012059
dc.description.abstract Although aspects of power generation of many offshore renewable devices are well understood, their dynamic responses under high wind and wave conditions are still to be investigated to a great detail. Output only statistical markers are important for these offshore devices, since access to the device is limited and information about the exposure conditions and the true behaviour of the devices are generally partial, limited, and vague or even absent. The markers can summarise and characterise the behaviour of these devices from their dynamic response available as time series data. The behaviour may be linear or nonlinear and consequently a marker that can track the changes in structural situations can be quite important. These markers can then be helpful in assessing the current condition of the structure and can indicate possible intervention, monitoring or assessment. This paper considers a Delay Vector Variance based marker for changes in a tension leg platform tested in an ocean wave basin for structural changes brought about by single column dampers. The approach is based on dynamic outputs of the device alone and is based on the estimation of the nonlinearity of the output signal. The advantages of the selected marker and its response with changing structural properties are discussed. The marker is observed to be important for monitoring the as- deployed structural condition and is sensitive to changes in such conditions. Influence of exposure conditions of wave loading is also discussed in this study based only on experimental data. en
dc.description.sponsorship Marine Renewable Energy Ireland (Grant No. 12/RC/2302); Science Foundation Ireland (SFI Advance Award 14/ADV/RC3022) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher IOP Publishing Ltd en
dc.relation.ispartof 11th International Conference on Damage Assessment of Structures (DAMAS 2015)
dc.relation.uri http://stacks.iop.org/1742-6596/628/i=1/a=012059
dc.rights © 2015, the Authors. Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. en
dc.rights.uri http://creativecommons.org/licenses/by/3.0/ en
dc.subject Offshore structure en
dc.subject Structural health monitoring en
dc.subject Signal processing en
dc.subject Delay Vector Variance method en
dc.title A Delay Vector Variance based marker for an output-only assessment of structural changes in tension leg platforms en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Vesna Jaksic, Civil, Structural and Environmental Engineering, University College Cork, Cork, Ireland. +353-21-490-3000 Email: v.jaksic@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2015-07-24T23:08:14Z
dc.description.version Published Version en
dc.internal.rssid 309067366
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Marine Renewable Energy Ireland
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Physics: Conference Series en
dc.internal.copyrightchecked No en
dc.internal.licenseacceptance Yes en
dc.internal.conferencelocation Ghent, Belgium en
dc.internal.IRISemailaddress v.jaksic@ucc.ie en


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© 2015, the Authors. Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Except where otherwise noted, this item's license is described as © 2015, the Authors. Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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