Abstract
North Sea. In order to investigate dynamic behaviors under a complex state of loads, a continuous dynamic monitoring system was implemented by Federal Institute for Material Research and Testing (BAM). It recorded structural responses and environmental/operational variables from November 2007 to October 2009.
This paper presents significant resonance phenomenon due to the interaction in the tower-nacelle system under operational conditions. Modal parameters are automatically estimated by the poly reference Least Square Complex Frequency domain (p-LSCF) method. Campbell plot demonstrates that a three-blade passage frequency and its multiples f3n match with the natural frequencies of the wind turbine system in several modal orders. The damping estimates decrease and the vibration amplitude increase significantly. A control system is necessary to minimize the excessive vibrations.
This paper presents significant resonance phenomenon due to the interaction in the tower-nacelle system under operational conditions. Modal parameters are automatically estimated by the poly reference Least Square Complex Frequency domain (p-LSCF) method. Campbell plot demonstrates that a three-blade passage frequency and its multiples f3n match with the natural frequencies of the wind turbine system in several modal orders. The damping estimates decrease and the vibration amplitude increase significantly. A control system is necessary to minimize the excessive vibrations.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014 Porto, Portugal, 30 June - 2 July 2014 |
| Publication date | 2015 |
| Pages | 3619-3626 |
| ISBN (Electronic) | 978-972-752-165-4 |
| Publication status | Published - 2015 |
| Externally published | Yes |
| Event | 9th International Conference on Structural Dynamics - Porto, Portugal Duration: 30 Jun 2014 → 2 Jul 2014 Conference number: 9 http://paginas.fe.up.pt/~eurodyn2014/ |
Conference
| Conference | 9th International Conference on Structural Dynamics |
|---|---|
| Number | 9 |
| Country/Territory | Portugal |
| City | Porto |
| Period | 30/06/2014 → 02/07/2014 |
| Internet address |
Keywords
- Wind Turbine
- Tower-Nacelle system
- Resonance
- Continuous dynamic monitoring
- Automated operational modal analysis