Abstract
This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination and sea surface elevation. Natural frequencies and corresponding damping ratios are assessed using different operational modal analysis techniques, enhanced frequency domain decomposition and stochastic subspace identification. Application and results from both methods are compared and discussed. Research shows that the total damping ratio of the lowest eigenmode is normally distributed with mean value of 1.11% of critical damping. Linear correlation between the damping ratio and the significant wave height is observed.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of ISMA2016 : International conference proceedings on noise and vibration engineering |
| Editors | P. Sas, D. Moens, A. van de Walle |
| Number of pages | 10 |
| Place of Publication | Leuven |
| Publisher | KU Leuven, Department of Mechanical Engineering, PMA |
| Publication date | 2016 |
| Pages | 4045-4054 |
| Publication status | Published - 2016 |
| Event | The International Conference on Noise and Vibration Engineering - Leuven, Belgium Duration: 19 Sept 2016 → 21 Sept 2016 Conference number: 2016 |
Conference
| Conference | The International Conference on Noise and Vibration Engineering |
|---|---|
| Number | 2016 |
| Country/Territory | Belgium |
| City | Leuven |
| Period | 19/09/2016 → 21/09/2016 |
Keywords
- Offshore foundations
- Mono bucket foundations
- Full scale
- Experimental damping assessment