The Hurst exponent as an indicator of the behaviour of a model monopile in an ocean wave testing basin

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dc.contributor.author Pakrashi, Vikram
dc.contributor.author O'Shea, Richard
dc.contributor.author Jaksic, Vesna
dc.contributor.author Murphy, Jimmy
dc.date.accessioned 2016-05-19T12:11:01Z
dc.date.available 2016-05-19T12:11:01Z
dc.date.issued 2015-07
dc.identifier.citation Pakrashi, V., O'Shea, R., Jaksic, V. and Murphy, J. (2015) 'The Hurst exponent as an indicator of the behaviour of a model monopile in an ocean wave testing basin', Journal of Physics: Conference Series, 628 (1), 012057. doi: 10.1088/1742-6596/628/1/012057 en
dc.identifier.volume 628 en
dc.identifier.issued 1 en
dc.identifier.startpage 012057 en
dc.identifier.issn 1742-6596
dc.identifier.uri http://hdl.handle.net/10468/2589
dc.identifier.doi 10.1088/1742-6596/628/1/012057
dc.description.abstract With the importance of renewable energy well-established worldwide, and targets of such energy quantified in many cases, there exists a considerable interest in the assessment of wind and wave devices. While the individual components of these devices are often relatively well understood and the aspects of energy generation well researched, there seems to be a gap in the understanding of these devices as a whole and especially in the field of their dynamic responses under operational conditions. The mathematical modelling and estimation of their dynamic responses are more evolved but research directed towards testing of these devices still requires significant attention. Model-free indicators of the dynamic responses of these devices are important since it reflects the as-deployed behaviour of the devices when the exposure conditions are scaled reasonably correctly, along with the structural dimensions. This paper demonstrates how the Hurst exponent of the dynamic responses of a monopile exposed to different exposure conditions in an ocean wave basin can be used as a model-free indicator of various responses. The scaled model is exposed to Froude scaled waves and tested under different exposure conditions. The analysis and interpretation is carried out in a model-free and output-only environment, with only some preliminary ideas regarding the input of the system. The analysis indicates how the Hurst exponent can be an interesting descriptor to compare and contrast various scenarios of dynamic response conditions. en
dc.description.sponsorship Marine Renewable Energy Ireland (Grant No. 12/RC/2302); Science Foundation Ireland (SFI Advance Award 14/ADV/RC3022); PhD Scholarship (R13570) 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=012057
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 Tank testing en
dc.subject Monopile foundations en
dc.title The Hurst exponent as an indicator of the behaviour of a model monopile in an ocean wave testing basin 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 2015-07-24T23:10:30Z
dc.description.version Published Version en
dc.internal.rssid 309067364
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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