Nonlinear Pitch Decay Motion of a Floating Offshore Wind
Model tests were conducted on three generic floating wind turbine systems in 2011 and reported in a series of papers at the 31st Ocean, Offshore, and Arctic Engineering Con-ference in 2012. These tests were conducted at the MARIN facility in The Netherlands, by a consortium of universities, governme...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.656.8143 2023-05-15T15:08:42+02:00 Nonlinear Pitch Decay Motion of a Floating Offshore Wind K. P. Thiagarajan R. Urbina W. Hsu Turbine Structure The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.656.8143 http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.656.8143 http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 text ftciteseerx 2016-01-08T16:39:12Z Model tests were conducted on three generic floating wind turbine systems in 2011 and reported in a series of papers at the 31st Ocean, Offshore, and Arctic Engineering Con-ference in 2012. These tests were conducted at the MARIN facility in The Netherlands, by a consortium of universities, government research organizations, and industry. As part of the testing program, decay tests in platform pitch were conducted with and without wind forcing. It was found that for spar and semisubmersible type structures, resonant pitch motion was damped due to wind in storm sea conditions. The nonlinear decay motion of a floating wind turbine platform is modeled using a one degree-of-freedom nonlinear oscillation equation about a mean offset angle. Attention is paid to the turbine thrust coefficient and its variability with respect to oncoming flow speed, which in turn is affected by the structure pitch motion. The equation of motion reveals that the mean offset position has an important role in the stiffness, damping, and consequently the natural period of pitch motion. Several important dimensionless parameters are introduced. The paper discusses a simple thrust model for an offshore wind turbine (OWT) based on rudi-ments of blade element theory. Using the simplified thrust coefficient formulation, the increase in platform pitch damping due to wind is formulated. Experimental data reported from prior tests described above show good agreement with the theoretical model. [DOI:10.1115/1.4028744] Text Arctic Unknown Arctic |
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Model tests were conducted on three generic floating wind turbine systems in 2011 and reported in a series of papers at the 31st Ocean, Offshore, and Arctic Engineering Con-ference in 2012. These tests were conducted at the MARIN facility in The Netherlands, by a consortium of universities, government research organizations, and industry. As part of the testing program, decay tests in platform pitch were conducted with and without wind forcing. It was found that for spar and semisubmersible type structures, resonant pitch motion was damped due to wind in storm sea conditions. The nonlinear decay motion of a floating wind turbine platform is modeled using a one degree-of-freedom nonlinear oscillation equation about a mean offset angle. Attention is paid to the turbine thrust coefficient and its variability with respect to oncoming flow speed, which in turn is affected by the structure pitch motion. The equation of motion reveals that the mean offset position has an important role in the stiffness, damping, and consequently the natural period of pitch motion. Several important dimensionless parameters are introduced. The paper discusses a simple thrust model for an offshore wind turbine (OWT) based on rudi-ments of blade element theory. Using the simplified thrust coefficient formulation, the increase in platform pitch damping due to wind is formulated. Experimental data reported from prior tests described above show good agreement with the theoretical model. [DOI:10.1115/1.4028744] |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
K. P. Thiagarajan R. Urbina W. Hsu Turbine Structure |
spellingShingle |
K. P. Thiagarajan R. Urbina W. Hsu Turbine Structure Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
author_facet |
K. P. Thiagarajan R. Urbina W. Hsu Turbine Structure |
author_sort |
K. P. Thiagarajan |
title |
Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
title_short |
Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
title_full |
Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
title_fullStr |
Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
title_full_unstemmed |
Nonlinear Pitch Decay Motion of a Floating Offshore Wind |
title_sort |
nonlinear pitch decay motion of a floating offshore wind |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.656.8143 http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.656.8143 http://proceedings.asmedigitalcollection.asme.org/data/Journals/JMOEEX/930926/omae_137_01_011902.pdf?resultClick%3D1 |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766340015377350656 |