Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation
The effect from fully nonlinear irregular wave forcing on the fatigue life of the foundation and tower of an offshore wind turbine is investigated through aeroelastic calculations. Five representative sea states with increasing significant wave height are considered in a water depth of 40 m. The wav...
Main Authors: | , , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | English |
Published: |
American Society of Mechanical Engineers
2013
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/9797ebea-7e9d-407f-bdd8-6189fa09335d |
id |
ftdtupubl:oai:pure.atira.dk:publications/9797ebea-7e9d-407f-bdd8-6189fa09335d |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/9797ebea-7e9d-407f-bdd8-6189fa09335d 2023-05-15T14:23:45+02:00 Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation Schløer, Signe Bredmose, Henrik Bingham, Harry B. Larsen, Torben J. 2013 https://orbit.dtu.dk/en/publications/9797ebea-7e9d-407f-bdd8-6189fa09335d eng eng American Society of Mechanical Engineers info:eu-repo/semantics/closedAccess Schløer , S , Bredmose , H , Bingham , H B & Larsen , T J 2013 , Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation . in Proceedings of the ASME 31th 2012 International Conference on Ocean, Offshore and Arctic Engineering . vol. 7 , American Society of Mechanical Engineers , pp. 393-402 , 31st ASME International Conference on Ocean, Offshore and Arctic Engineering , Rio de Janeiro , Brazil , 01/07/2012 . contributionToPeriodical 2013 ftdtupubl 2022-08-14T08:13:37Z The effect from fully nonlinear irregular wave forcing on the fatigue life of the foundation and tower of an offshore wind turbine is investigated through aeroelastic calculations. Five representative sea states with increasing significant wave height are considered in a water depth of 40 m. The waves are both linear and fully nonlinear irregular 2D waves. The wind turbine is the NREL 5-MW reference wind turbine. Fatigue analysis is performed in relation to analysis of the sectional forces in the tower and monopile. Impulsive excitation of the sectional force at the bottom of the tower is seen when the waves are large and nonlinear and most notably for small wind speeds. In case of strong velocities and turbulent wind, the excitation is damped out. In the monopile no excitation of the force is seen, but even for turbulent strong wind the wave affects the forces in the pile significantly. The analysis indicates that the nonlinearity of the waves can change the fatigue damage level significantly in particular when the wave and wind direction is misaligned. Other Non-Article Part of Journal/Newspaper Arctic Technical University of Denmark: DTU Orbit |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
The effect from fully nonlinear irregular wave forcing on the fatigue life of the foundation and tower of an offshore wind turbine is investigated through aeroelastic calculations. Five representative sea states with increasing significant wave height are considered in a water depth of 40 m. The waves are both linear and fully nonlinear irregular 2D waves. The wind turbine is the NREL 5-MW reference wind turbine. Fatigue analysis is performed in relation to analysis of the sectional forces in the tower and monopile. Impulsive excitation of the sectional force at the bottom of the tower is seen when the waves are large and nonlinear and most notably for small wind speeds. In case of strong velocities and turbulent wind, the excitation is damped out. In the monopile no excitation of the force is seen, but even for turbulent strong wind the wave affects the forces in the pile significantly. The analysis indicates that the nonlinearity of the waves can change the fatigue damage level significantly in particular when the wave and wind direction is misaligned. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Schløer, Signe Bredmose, Henrik Bingham, Harry B. Larsen, Torben J. |
spellingShingle |
Schløer, Signe Bredmose, Henrik Bingham, Harry B. Larsen, Torben J. Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
author_facet |
Schløer, Signe Bredmose, Henrik Bingham, Harry B. Larsen, Torben J. |
author_sort |
Schløer, Signe |
title |
Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
title_short |
Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
title_full |
Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
title_fullStr |
Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
title_full_unstemmed |
Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
title_sort |
effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation |
publisher |
American Society of Mechanical Engineers |
publishDate |
2013 |
url |
https://orbit.dtu.dk/en/publications/9797ebea-7e9d-407f-bdd8-6189fa09335d |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Schløer , S , Bredmose , H , Bingham , H B & Larsen , T J 2013 , Effects from fully nonlinear irregular wave forcing on the fatigue life of an offshore wind turbine and its monopile foundation . in Proceedings of the ASME 31th 2012 International Conference on Ocean, Offshore and Arctic Engineering . vol. 7 , American Society of Mechanical Engineers , pp. 393-402 , 31st ASME International Conference on Ocean, Offshore and Arctic Engineering , Rio de Janeiro , Brazil , 01/07/2012 . |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1766296243319865344 |