Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading
Fixed offshore wind turbines continue to be developed for high latitude areas where not only wind and wave loads need to be considered but also moving sea ice. Current rules and regulations for the design of fixed offshore structures in ice-covered waters do not adequately consider the effects of ic...
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fttuhamburg:oai:tore.tuhh.de:11420/11531 2023-10-01T03:54:21+02:00 Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading Braun, Moritz Dörner, Alfons ter Veer, Kane F. Willems, Tom Seidel, Marc Hendrikse, Hayo Høyland, Knut V. Fischer, Claas Ehlers, Sören 2022-01-13 application/pdf https://doi.org/10.3390/en15020559 http://hdl.handle.net/11420/11531 https://doi.org/10.15480/882.4113 en eng Multidisciplinary Digital Publishing Institute Energies 1996-1073 doi:10.3390/en15020559 Energies 15 (2): 559 (2022) http://hdl.handle.net/11420/11531 doi:10.15480/882.4113 2-s2.0-85122975584 CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ false arctic conditions ice-induced vibrations offshore wind turbine support structures stress-time sequence damage model rainflow counting Markov chain method omission level low-temperature fatigue 620: Ingenieurwissenschaften Journal Article Other 2022 fttuhamburg https://doi.org/10.3390/en1502055910.15480/882.4113 2023-09-03T22:13:10Z Fixed offshore wind turbines continue to be developed for high latitude areas where not only wind and wave loads need to be considered but also moving sea ice. Current rules and regulations for the design of fixed offshore structures in ice-covered waters do not adequately consider the effects of ice loading and its stochastic nature on the fatigue life of the structure. Ice crushing on such structures results in ice-induced vibrations, which can be represented by loading the structure using a variable-amplitude loading (VAL) sequence. Typical offshore load spectra are developed for wave and wind loading. Thus, a combined VAL spectrum is developed for wind, wave, and ice action. To this goal, numerical models are used to simulate the dynamic ice-, wind-, and wave-structure interaction. The stress time-history at an exemplarily selected critical point in an offshore wind energy monopile support structure is extracted from the model and translated into a VAL sequence, which can then be used as a loading sequence for the fatigue assessment or fatigue testing of welded joints of offshore wind turbine support structures. This study presents the approach to determine combined load spectra and standardized time series for wind, wave, and ice action. Fixed offshore wind turbines continue to be developed for high latitude areas where not only wind and wave loads need to be considered but also moving sea ice. Current rules and regulations for the design of fixed offshore structures in ice-covered waters do not adequately consider the effects of ice loading and its stochastic nature on the fatigue life of the structure. Ice crushing on such structures results in ice-induced vibrations, which can be represented by loading the structure using a variable-amplitude loading (VAL) sequence. Typical offshore load spectra are developed for wave and wind loading. Thus, a combined VAL spectrum is developed for wind, wave, and ice action. To this goal, numerical models are used to simulate the dynamic ice-, wind-, and ... Article in Journal/Newspaper Arctic Sea ice ice covered waters TUHH Open Research (TORE - Technische Universität Hamburg) Arctic |
institution |
Open Polar |
collection |
TUHH Open Research (TORE - Technische Universität Hamburg) |
op_collection_id |
fttuhamburg |
language |
English |
topic |
arctic conditions ice-induced vibrations offshore wind turbine support structures stress-time sequence damage model rainflow counting Markov chain method omission level low-temperature fatigue 620: Ingenieurwissenschaften |
spellingShingle |
arctic conditions ice-induced vibrations offshore wind turbine support structures stress-time sequence damage model rainflow counting Markov chain method omission level low-temperature fatigue 620: Ingenieurwissenschaften Braun, Moritz Dörner, Alfons ter Veer, Kane F. Willems, Tom Seidel, Marc Hendrikse, Hayo Høyland, Knut V. Fischer, Claas Ehlers, Sören Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
topic_facet |
arctic conditions ice-induced vibrations offshore wind turbine support structures stress-time sequence damage model rainflow counting Markov chain method omission level low-temperature fatigue 620: Ingenieurwissenschaften |
description |
Fixed offshore wind turbines continue to be developed for high latitude areas where not only wind and wave loads need to be considered but also moving sea ice. Current rules and regulations for the design of fixed offshore structures in ice-covered waters do not adequately consider the effects of ice loading and its stochastic nature on the fatigue life of the structure. Ice crushing on such structures results in ice-induced vibrations, which can be represented by loading the structure using a variable-amplitude loading (VAL) sequence. Typical offshore load spectra are developed for wave and wind loading. Thus, a combined VAL spectrum is developed for wind, wave, and ice action. To this goal, numerical models are used to simulate the dynamic ice-, wind-, and wave-structure interaction. The stress time-history at an exemplarily selected critical point in an offshore wind energy monopile support structure is extracted from the model and translated into a VAL sequence, which can then be used as a loading sequence for the fatigue assessment or fatigue testing of welded joints of offshore wind turbine support structures. This study presents the approach to determine combined load spectra and standardized time series for wind, wave, and ice action. Fixed offshore wind turbines continue to be developed for high latitude areas where not only wind and wave loads need to be considered but also moving sea ice. Current rules and regulations for the design of fixed offshore structures in ice-covered waters do not adequately consider the effects of ice loading and its stochastic nature on the fatigue life of the structure. Ice crushing on such structures results in ice-induced vibrations, which can be represented by loading the structure using a variable-amplitude loading (VAL) sequence. Typical offshore load spectra are developed for wave and wind loading. Thus, a combined VAL spectrum is developed for wind, wave, and ice action. To this goal, numerical models are used to simulate the dynamic ice-, wind-, and ... |
format |
Article in Journal/Newspaper |
author |
Braun, Moritz Dörner, Alfons ter Veer, Kane F. Willems, Tom Seidel, Marc Hendrikse, Hayo Høyland, Knut V. Fischer, Claas Ehlers, Sören |
author_facet |
Braun, Moritz Dörner, Alfons ter Veer, Kane F. Willems, Tom Seidel, Marc Hendrikse, Hayo Høyland, Knut V. Fischer, Claas Ehlers, Sören |
author_sort |
Braun, Moritz |
title |
Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
title_short |
Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
title_full |
Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
title_fullStr |
Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
title_full_unstemmed |
Development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
title_sort |
development of combined load spectra for offshore structures subjected to wind, wave, and ice loading |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/en15020559 http://hdl.handle.net/11420/11531 https://doi.org/10.15480/882.4113 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice ice covered waters |
genre_facet |
Arctic Sea ice ice covered waters |
op_relation |
Energies 1996-1073 doi:10.3390/en15020559 Energies 15 (2): 559 (2022) http://hdl.handle.net/11420/11531 doi:10.15480/882.4113 2-s2.0-85122975584 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ false |
op_doi |
https://doi.org/10.3390/en1502055910.15480/882.4113 |
_version_ |
1778521884617342976 |