Abstract
With increasing interests in the development of offshore floating
vertical axis wind turbines (FVAWTs), a large amount of studies on the
FVAWTs have been conducted. This paper focuses on evaluating the
effect of second-order difference-frequency force on the dynamics of a
5 MW FVAWT in misaligned wave-wind condition. The studied
FVAWT is composed of a 5 MW Darrieus rotor, a semi-submersible
floater and a catenary mooring system. Fully coupled nonlinear time
domain simulations were conducted using the state-of-art code Simo-
Riflex-DMS. Several misaligned wave-wind conditions were selected
to investigate the global dynamic responses of the FVAWT, such as the
platform motions, structural responses and mooring line tensions. It has
been found that the wave-wind misalignment does not significantly
affect the mean values of the global responses since the global
responses are primarily wind-induced. And the second order differencefrequency
force can contribute to a slightly larger mean value. The
standard deviations and maximum values of the global responses are
slightly more sensitive to the wave-wind misalignment and the second
order difference-frequency force, especially at high significant wave
height conditions.
Original language | English |
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Title of host publication | Proceedings of the Twenty-fifth (2015) International Ocean and Polar Engineering Conference |
Publisher | International Society of Offshore and Polar Engineers |
Publication date | 2015 |
Pages | 517-524 |
ISBN (Print) | 978-1-880653-89-0 |
Publication status | Published - 2015 |
Event | 25th International Ocean and Polar Engineering Conference - Kona, United States Duration: 21 Jun 2015 → 26 Jun 2015 http://www.isope.org/conferences/conferences.htm |
Conference
Conference | 25th International Ocean and Polar Engineering Conference |
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Country/Territory | United States |
City | Kona |
Period | 21/06/2015 → 26/06/2015 |
Internet address |
Series | Proceedings of the International Offshore and Polar Engineering Conference |
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ISSN | 1098-6189 |
Keywords
- Floating vertical axis wind turbine
- Difference-frequency force
- Wave-wind misalignment
- Dynamic responses