Physical modelling of wave scattering around fixed FPSO-shaped bodies
dc.contributor.author | Mai, T | |
dc.contributor.author | Greaves, Deborah | |
dc.contributor.author | Raby, Alison | |
dc.contributor.author | Taylor, PH | |
dc.date.accessioned | 2017-02-15T18:17:07Z | |
dc.date.issued | 2016-12-01 | |
dc.identifier.uri | http://hdl.handle.net/10026.1/8508 | |
dc.description.abstract |
FPSO (Floating Production Storage and Off-loading) vessels used for offshore oil and gas production are operated in deep water, often at locations which experience severe wave loading. This paper reports on laboratory experiments on a series of simplified FPSO-shaped bodies, with the aim of understanding more about the wave-structure interaction, particularly the generation of scattered waves. These tests were carried out in the Ocean Basin at Plymouth University’s COAST Laboratory where the effects on the wave-structure interaction of model length, wave steepness and incident wave direction were investigated. All three models had semi-circular ends, separated by a box section for the 2 longer models. Input waves were based on focused wave groups generated using NewWave with an underlying JONSWAP spectrum. A general phase-based harmonic separation method was applied to separate the linear and higher-harmonic wave components of the free-surface elevation surrounding the bodies, and of relevance to the assessment of wave loads. Close to the bow of the model, the highest amplitude scattered waves are observed with the most compact model, and the third- and fourth-harmonics are significantly larger than the equivalent incident bound harmonic components. At the locations close to the stern, the linear harmonic is found to increase as the model length is decreased, although the nonlinear harmonics are similar for all three tested lengths, and the second- and third-harmonics are strongest with the medium length model. The nonlinear scattered waves increase with increasing wave steepness and a second pulse is evident in the higher-order scattered wave fields. As the incident wave angle between the waves and the long axis of the vessel is increased from 0 (head-on) to 20 degrees, the third- and fourthharmonic scattered waves reduce on the upstream side. These third- and fourth-harmonic diffracted waves should be considered in assessing wave run-up for offshore structure design, and may be relevant to the excitation of ringing-type structural responses in fixed and taut moored structures. | |
dc.format.extent | 115-129 | |
dc.language.iso | en | |
dc.relation.uri | http://hdl.handle.net/10026.1/8263 | |
dc.title | Physical modelling of wave scattering around fixed FPSO-shaped bodies | |
dc.type | journal-article | |
plymouth.volume | 61 | |
plymouth.journal | Applied Ocean Research | |
dc.identifier.doi | 10.1016/j.apor.2016.10.007 | |
plymouth.organisational-group | /Plymouth | |
plymouth.organisational-group | /Plymouth/Admin Group - REF | |
plymouth.organisational-group | /Plymouth/Admin Group - REF/REF Admin Group - FoSE | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering | |
plymouth.organisational-group | /Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics | |
plymouth.organisational-group | /Plymouth/PRIMaRE Publications | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA | |
plymouth.organisational-group | /Plymouth/REF 2021 Researchers by UoA/UoA12 Engineering | |
plymouth.organisational-group | /Plymouth/Research Groups | |
plymouth.organisational-group | /Plymouth/Research Groups/Marine Institute | |
plymouth.organisational-group | /Plymouth/Users by role | |
plymouth.organisational-group | /Plymouth/Users by role/Academics | |
plymouth.organisational-group | /Plymouth/Users by role/Researchers in ResearchFish submission | |
dcterms.dateAccepted | 2016-10-23 | |
dc.rights.embargodate | 2017-12-01 | |
dc.rights.embargoperiod | 12 months | |
rioxxterms.funder | EPSRC | |
rioxxterms.identifier.project | FROTH: Fundamentals and Reliability of Offshore Structure Hydrodynamics | |
rioxxterms.versionofrecord | 10.1016/j.apor.2016.10.007 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/under-embargo-all-rights-reserved | |
rioxxterms.licenseref.startdate | 2016-12-01 | |
rioxxterms.type | Journal Article/Review | |
plymouth.funder | FROTH: Fundamentals and Reliability of Offshore Structure Hydrodynamics::EPSRC | |
plymouth.oa-location | http://www.sciencedirect.com/science/article/pii/S0141118716304497?via=ihub |