Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method
In the field of stochastic dynamics of marine structures, environmental conditions play a vital role. Considering wind and waves as random processes, determining the environmental parameters which correspond to an annual exceedance probability for a certain structural concept is of vital importance...
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American Society of Mechanical Engineers (ASME)
2019
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ftqueensubelpubl:oai:pure.qub.ac.uk/portal:publications/4e48e48e-6a76-453c-8587-7cbc25897a9a 2024-01-14T10:03:13+01:00 Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method Barreto, David Moghtadaei, Abdolmajid Karimirad, Madjid Ortega, Arturo 2019-11-11 application/pdf https://pure.qub.ac.uk/en/publications/4e48e48e-6a76-453c-8587-7cbc25897a9a https://doi.org/10.1115/OMAE2019-95390 https://pureadmin.qub.ac.uk/ws/files/166816398/OMAE_FINAL_Conference_Paper_3_.pdf eng eng American Society of Mechanical Engineers (ASME) info:eu-repo/semantics/openAccess Barreto , D , Moghtadaei , A , Karimirad , M & Ortega , A 2019 , Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method . in Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE2019 June 9-14, 2019, Glasgow, Scotland : Structures, Safety, and Reliability . vol. 3 , American Society of Mechanical Engineers (ASME) . https://doi.org/10.1115/OMAE2019-95390 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water contributionToPeriodical 2019 ftqueensubelpubl https://doi.org/10.1115/OMAE2019-95390 2023-12-21T23:31:12Z In the field of stochastic dynamics of marine structures, environmental conditions play a vital role. Considering wind and waves as random processes, determining the environmental parameters which correspond to an annual exceedance probability for a certain structural concept is of vital importance for the respective assessment of the loads and their effects. The accuracy in predicting the conditions, especially those corresponding to the sea, is of a great relevance when a probabilistic design is performed in order to ensure the structural integrity of an offshore wind turbine. In particular, models are not always completely perfect and accurate data is not always available. The Environmental Contour Method (ECM), which is based on the IFORM methodology, is one of the most popular methods in the offshore industry when determining the environmental conditions, for a given annual exceedance probability, is required. The ECM allows analysing proper sea states for operational and extreme conditions with lower computational efforts than the most accurate method (Full Long-Term Analysis). In the present study, effects of progressive variations (uncertainties) of the sea states parameters (i.e. significant wave height, spectral peak period) on the dynamic response of a Monopile Wind Turbine (NREL 5MW) are analysed. Two operative conditions are considered: rated wind and cut-out wind speed. In each case, the 50-year environmental contour (EC) is plotted for a site located in the North Sea. Some sea states are selected from the EC (base cases) and then derived cases with percentage variations are generated. All the cases are simulated in FAST (NREL) and the standard deviations of the time series are compared with its respective values of base cases. The results for the dynamic responses at mudline (e.g. overturning moments and shear forces) are presented as the most important parameters governing the design of the monopile. In this analysis, the wave height shows more influence on the response variation percentage than ... Article in Journal/Newspaper Arctic Queen's University Belfast Research Portal Volume 3: Structures, Safety, and Reliability |
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Queen's University Belfast Research Portal |
op_collection_id |
ftqueensubelpubl |
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English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
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/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water Barreto, David Moghtadaei, Abdolmajid Karimirad, Madjid Ortega, Arturo Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
description |
In the field of stochastic dynamics of marine structures, environmental conditions play a vital role. Considering wind and waves as random processes, determining the environmental parameters which correspond to an annual exceedance probability for a certain structural concept is of vital importance for the respective assessment of the loads and their effects. The accuracy in predicting the conditions, especially those corresponding to the sea, is of a great relevance when a probabilistic design is performed in order to ensure the structural integrity of an offshore wind turbine. In particular, models are not always completely perfect and accurate data is not always available. The Environmental Contour Method (ECM), which is based on the IFORM methodology, is one of the most popular methods in the offshore industry when determining the environmental conditions, for a given annual exceedance probability, is required. The ECM allows analysing proper sea states for operational and extreme conditions with lower computational efforts than the most accurate method (Full Long-Term Analysis). In the present study, effects of progressive variations (uncertainties) of the sea states parameters (i.e. significant wave height, spectral peak period) on the dynamic response of a Monopile Wind Turbine (NREL 5MW) are analysed. Two operative conditions are considered: rated wind and cut-out wind speed. In each case, the 50-year environmental contour (EC) is plotted for a site located in the North Sea. Some sea states are selected from the EC (base cases) and then derived cases with percentage variations are generated. All the cases are simulated in FAST (NREL) and the standard deviations of the time series are compared with its respective values of base cases. The results for the dynamic responses at mudline (e.g. overturning moments and shear forces) are presented as the most important parameters governing the design of the monopile. In this analysis, the wave height shows more influence on the response variation percentage than ... |
format |
Article in Journal/Newspaper |
author |
Barreto, David Moghtadaei, Abdolmajid Karimirad, Madjid Ortega, Arturo |
author_facet |
Barreto, David Moghtadaei, Abdolmajid Karimirad, Madjid Ortega, Arturo |
author_sort |
Barreto, David |
title |
Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
title_short |
Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
title_full |
Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
title_fullStr |
Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
title_full_unstemmed |
Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method |
title_sort |
sensitivity analysis of a bottom fixed offshore wind turbine using the environmental contour method |
publisher |
American Society of Mechanical Engineers (ASME) |
publishDate |
2019 |
url |
https://pure.qub.ac.uk/en/publications/4e48e48e-6a76-453c-8587-7cbc25897a9a https://doi.org/10.1115/OMAE2019-95390 https://pureadmin.qub.ac.uk/ws/files/166816398/OMAE_FINAL_Conference_Paper_3_.pdf |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Barreto , D , Moghtadaei , A , Karimirad , M & Ortega , A 2019 , Sensitivity Analysis Of A Bottom Fixed Offshore Wind Turbine Using The Environmental Contour Method . in Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE2019 June 9-14, 2019, Glasgow, Scotland : Structures, Safety, and Reliability . vol. 3 , American Society of Mechanical Engineers (ASME) . https://doi.org/10.1115/OMAE2019-95390 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1115/OMAE2019-95390 |
container_title |
Volume 3: Structures, Safety, and Reliability |
_version_ |
1788058129741643776 |