dc.contributor.author | Ziegler, Lisa Sabine | |
dc.contributor.author | Muskulus, Michael | |
dc.date.accessioned | 2019-08-28T12:15:25Z | |
dc.date.available | 2019-08-28T12:15:25Z | |
dc.date.created | 2016-12-13T14:53:41Z | |
dc.date.issued | 2016 | |
dc.identifier.isbn | 978-0-7918-4997-2 | |
dc.identifier.uri | http://hdl.handle.net/11250/2611430 | |
dc.description.abstract | Accurate lifetime predictions are needed for support structures of offshore wind turbines to optimize operation and maintenance and to decide about lifetime extension of aging wind farms. A comparison of a facture mechanics model to the SN-curve approach for jacket supported offshore wind turbines shows that it is attractive for lifetime extension decisions; however major challenges are calibration of material parameters and assumptions for initial crack size. Crack growths on a Y-joint connecting brace and jacket leg was analysed with simulations of structural response to aero- and hydrodynamic loading and Paris’ law for crack propagation. The model was calibrated to yield an identical fatigue life as obtained from the SN-curve analysis. The effect of weather seasonality on crack growth was evaluated with a Markov weather model and Monte Carlo simulations. Results show that crack growth is sensitive to parameter calibration and follows seasonal weather trends. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | ASME | nb_NO |
dc.relation.ispartof | ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering - Volume 6: Ocean Space Utilization; Ocean Renewable Energy | |
dc.title | Comparing a fracture mechanics model to the SN-curve approach for jacket-supported offshore wind turbines: challenges and opportunities for lifetime prediction | nb_NO |
dc.type | Chapter | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.identifier.doi | 10.1115/OMAE2016-54915 | |
dc.identifier.cristin | 1412204 | |
dc.relation.project | EU/642108 | nb_NO |
dc.description.localcode | Copyright © 2016 by ASME | nb_NO |
cristin.unitcode | 194,64,91,0 | |
cristin.unitname | Institutt for bygg- og miljøteknikk | |
cristin.ispublished | true | |
cristin.fulltext | preprint | |
cristin.qualitycode | 1 | |