dc.contributor.author | Bachynski, Erin Elizabeth | |
dc.contributor.author | Kristiansen, Trygve | |
dc.date.accessioned | 2017-11-28T12:07:54Z | |
dc.date.available | 2017-11-28T12:07:54Z | |
dc.date.created | 2017-10-05T15:35:59Z | |
dc.date.issued | 2017 | |
dc.identifier.isbn | 978-0-7918-5774-8 | |
dc.identifier.uri | http://hdl.handle.net/11250/2468247 | |
dc.description.abstract | Monopile support structures for offshore wind turbines may experience ringing-type responses in steep wave conditions. In order to experimentally capture the statistical distribution of the hydrodynamic loads and structural responses, traditional practice is to generate many 3-hour (full scale) realizations of the relevant sea states. An experimental campaign at 1:48 scale was carried out in the Lilletanken wave tank at NTNU/MARINTEK in order to examine the possibility of using shorter time windows to recreate irregular wave ringing events. Wave elevations and hydrodynamic loads on a rigid vertical circular cylinder in 27 m water depth were measured for a variety of 3-hour, 450 s (7.5-minute), 800 s (13.3-minute), 1150 s (19.2-minute), and 1500 s (25-minute) wave realizations, where all durations are listed in full scale. Wavelet transformations and a single degree-of-freedom oscillator were used to investigate the magnitude and repeatability of the high-frequency content of the wave loads. Large variations in the repeatability were seen among events. On average, the repeatability in the ringing response was 4.2 % for 3-hour tests, while 13.3-minute tests reproduced the same events within 9.1 %. The maximum deviation was, nonetheless, much higher when only 13.3 minutes were used. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Society of Mechanical Engineers (ASME) | nb_NO |
dc.relation.ispartof | ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 7B: Ocean Engineering | |
dc.title | Reproduction of Monopile Ringing Events in Reduced-Duration Model Tests | nb_NO |
dc.type | Chapter | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.volume | 7B | nb_NO |
dc.identifier.doi | 10.1115/OMAE2017-61034 | |
dc.identifier.cristin | 1502619 | |
dc.description.localcode | This chapter will not be available due to copyright restrictions (c) 2017 by ASME | nb_NO |
cristin.unitcode | 194,64,20,0 | |
cristin.unitname | Institutt for marin teknikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |