Long-term dynamic behavior of monopile supported offshore wind turbines in sand

Long-term dynamic behavior of monopile supported offshore wind turbines in sand

The complexity of the loads acting on the offshore wind turbines (OWTs) structures and the significance of investigation on structure dynamics are explained. Test results obtained from a scaled wind turbine model are also summarized. The model is supported on monopile, subjected to different types o...

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Main Authors: Lu-Qing Yu, Li-Zhong Wang, Zhen Guo, S. Bhattacharya, G. Nikitas, Ling-Ling Li, Yue-Long Xing
Format: Article
Language:English
Published: Elsevier 2015-03-01
Series:Theoretical and Applied Mechanics Letters
Subjects:
Offshore wind turbine
Long-term
Dynamic behavior
Strain accumulation
Similitude
Online Access:http://www.sciencedirect.com/science/article/pii/S2095034915000185
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spelling doaj-89751702f76d4968be85db55e391dad82020-11-25T00:32:16ZengElsevierTheoretical and Applied Mechanics Letters2095-03492015-03-0152808410.1016/j.taml.2015.02.003Long-term dynamic behavior of monopile supported offshore wind turbines in sandLu-Qing Yu0Li-Zhong Wang1Zhen Guo2S. Bhattacharya3G. Nikitas4Ling-Ling Li5Yue-Long Xing6Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaUniversity of Surrey, Department of Civil and Environmental Engineering, Guildford, Surrey GU2 7XH, UKUniversity of Surrey, Department of Civil and Environmental Engineering, Guildford, Surrey GU2 7XH, UKResearch Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, ChinaZhejiang Electric Power Design Institute, Zhejiang, Hangzhou 310012, ChinaThe complexity of the loads acting on the offshore wind turbines (OWTs) structures and the significance of investigation on structure dynamics are explained. Test results obtained from a scaled wind turbine model are also summarized. The model is supported on monopile, subjected to different types of dynamic loading using an innovative out of balance mass system to apply cyclic/dynamic loads. The test results show the natural frequency of the wind turbine structure increases with the number of cycles, but with a reduced rate of increase with the accumulation of soil strain level. The change is found to be dependent on the shear strain level in the soil next to the pile which matches with the expectations from the element tests of the soil. The test results were plotted in a non-dimensional manner in order to be scaled to predict the prototype consequences using element tests of a soil using resonant column apparatus.http://www.sciencedirect.com/science/article/pii/S2095034915000185Offshore wind turbineLong-termDynamic behaviorStrain accumulationSimilitude
collection DOAJ
language English
format Article
sources DOAJ
author Lu-Qing Yu
Li-Zhong Wang
Zhen Guo
S. Bhattacharya
G. Nikitas
Ling-Ling Li
Yue-Long Xing
spellingShingle Lu-Qing Yu
Li-Zhong Wang
Zhen Guo
S. Bhattacharya
G. Nikitas
Ling-Ling Li
Yue-Long Xing
Long-term dynamic behavior of monopile supported offshore wind turbines in sand
Theoretical and Applied Mechanics Letters
Offshore wind turbine
Long-term
Dynamic behavior
Strain accumulation
Similitude
author_facet Lu-Qing Yu
Li-Zhong Wang
Zhen Guo
S. Bhattacharya
G. Nikitas
Ling-Ling Li
Yue-Long Xing
author_sort Lu-Qing Yu
title Long-term dynamic behavior of monopile supported offshore wind turbines in sand
title_short Long-term dynamic behavior of monopile supported offshore wind turbines in sand
title_full Long-term dynamic behavior of monopile supported offshore wind turbines in sand
title_fullStr Long-term dynamic behavior of monopile supported offshore wind turbines in sand
title_full_unstemmed Long-term dynamic behavior of monopile supported offshore wind turbines in sand
title_sort long-term dynamic behavior of monopile supported offshore wind turbines in sand
publisher Elsevier
series Theoretical and Applied Mechanics Letters
issn 2095-0349
publishDate 2015-03-01
description The complexity of the loads acting on the offshore wind turbines (OWTs) structures and the significance of investigation on structure dynamics are explained. Test results obtained from a scaled wind turbine model are also summarized. The model is supported on monopile, subjected to different types of dynamic loading using an innovative out of balance mass system to apply cyclic/dynamic loads. The test results show the natural frequency of the wind turbine structure increases with the number of cycles, but with a reduced rate of increase with the accumulation of soil strain level. The change is found to be dependent on the shear strain level in the soil next to the pile which matches with the expectations from the element tests of the soil. The test results were plotted in a non-dimensional manner in order to be scaled to predict the prototype consequences using element tests of a soil using resonant column apparatus.
topic Offshore wind turbine
Long-term
Dynamic behavior
Strain accumulation
Similitude
url http://www.sciencedirect.com/science/article/pii/S2095034915000185
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AT lizhongwang longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
AT zhenguo longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
AT sbhattacharya longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
AT gnikitas longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
AT linglingli longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
AT yuelongxing longtermdynamicbehaviorofmonopilesupportedoffshorewindturbinesinsand
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