Abstract
As offshore wind farms are being installed farther and in deeper waters offshore,
new, and more sophisticated marine substructures such as jackets need to be used. Herein, a
10MW wind turbine mounted on a jacket sub structure at a mean water depth of 50 meters is
investigated with regards to the fatigue design loads on the braces of the jacket. Since large
wind turbines of 10MW rating have low rotor speeds (p), the modal frequencies of the sub
structures approach 3p at low wind speeds, which leads to a modal coupling and resonance.
Therefore an active control system is developed which provides sufficient structural damping
and consequently a fatigue reduction at the substructure. The resulting reduction in fatigue
design loads on the jacket structure based on the active control system is presented.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 11th World Congress on Computational Mechanics (WCCM XI) |
| Editors | Eugenio Onate, Xavier Oliver, Antonio Huerta |
| Number of pages | 9 |
| Volume | 4 |
| Publisher | International Center for Numerical Methods in Engineering |
| Publication date | 2014 |
| Pages | 3767-3775 |
| ISBN (Print) | 978-84-942844-7-2 |
| Publication status | Published - 2014 |
| Event | 11th World Congress on Computational Mechanics, 5th European Conference on Computational Mechanics, 6th European Conference on Computational Fluid Dynamics - Barcelona, Spain Duration: 20 Jul 2014 → 25 Jul 2014 |
Conference
| Conference | 11th World Congress on Computational Mechanics, 5th European Conference on Computational Mechanics, 6th European Conference on Computational Fluid Dynamics |
|---|---|
| Country/Territory | Spain |
| City | Barcelona |
| Period | 20/07/2014 → 25/07/2014 |
Keywords
- MATHEMATICS,
- MECHANICS
- Fatigue load
- extreme load
- active control
- foundation structure
