dc.contributor.author | Nejad, Amir Rasekhi | |
dc.contributor.author | Bachynski, Erin Elizabeth | |
dc.contributor.author | Moan, Torgeir | |
dc.date.accessioned | 2017-12-05T12:59:08Z | |
dc.date.available | 2017-12-05T12:59:08Z | |
dc.date.created | 2017-11-29T15:06:11Z | |
dc.date.issued | 2017 | |
dc.identifier.isbn | 978-0-7918-5777-9 | |
dc.identifier.uri | http://hdl.handle.net/11250/2469305 | |
dc.description.abstract | Common industrial practice for designing floating wind turbines is to set an operational limit for the tower-top axial acceleration, normally in the range of 0.2–0.3g, which is typically understood to be related to the safety of turbine components. This paper investigates the rationality of the tower-top acceleration limit by evaluating the correlation between acceleration and drivetrain responses. A 5 MW reference drivetrain is selected and modelled on a spar-type floating wind turbine in 320 m water depth. A range of environmental conditions are selected based on the long-term distribution of wind speed, significant wave height, and peak period from hindcast data for the Northern North Sea. For each condition, global analysis using an aero-hydro-servo-elastic tool is carried out for six one-hour realizations. The global analysis results provide useful information on their own — regarding the correlation between environmental condition and tower top acceleration, and correlation between tower top acceleration and other responses of interest — which are used as input in a decoupled analysis approach. The load effects and motions from the global analysis are applied on a detailed drivetrain model in a multi-body system (MBS) analysis tool. The local responses on bearings are then obtained from MBS analysis and post-processed for the correlation study. Although the maximum acceleration provides a good indication of the wave-induced loads, it is not seen to be a good predictor for significant fatigue damage on the main bearings in this case. | 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 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium | |
dc.title | On Tower Top Axial Acceleration and Drivetrain Responses in a Spar-Type Floating Wind Turbine | nb_NO |
dc.type | Chapter | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.identifier.doi | 10.1115/OMAE2017-62314 | |
dc.identifier.cristin | 1520356 | |
dc.description.localcode | (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.qualitycode | 1 | |