Abstract
This paper presents the analysis of the modal frequencies and mode shapes of the Vestas four-rotor wind turbine using two operational modal analysis methods. The Frequency Domain Decomposition method is used for standstill analysis, and the Ibrahim Time Domain method is used for the operational analysis. In the standstill analysis, 8 modes are estimated from the singular-value plot. In the operational analysis, 8 modes are identified among these three from the standstill analysis. The operational analysis reveals that the modes related to in-plane rotor motions dominate due to the high aerodynamic damping of out-of-plane motions.
| Original language | English |
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| Title of host publication | Proceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019 |
| Number of pages | 7 |
| Publisher | International Society of Offshore and Polar Engineers |
| Publication date | 2019 |
| Pages | 448-454 |
| ISBN (Print) | 978-1-880653-85-2 |
| Publication status | Published - 2019 |
| Event | The 29th International Ocean and Polar Engineering Conference - Honolulu, United States Duration: 16 Jun 2019 → 21 Jun 2019 |
Conference
| Conference | The 29th International Ocean and Polar Engineering Conference |
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| Country/Territory | United States |
| City | Honolulu |
| Period | 16/06/2019 → 21/06/2019 |
| Series | Proceedings of the International Offshore and Polar Engineering Conference |
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| ISSN | 1098-6189 |
Keywords
- Hierarchical clustering
- Multi-rotor wind turbine
- Operational modal analysis