Abstract
Operational modal analysis (OMA) has in the last decade shown its potential in the field of offshore structures such as oilrigs and wind turbines etc. Typically, the estimated modal parameters will be used in conjunction with a finite element (FE) model. However since bottom-fixed offshore structures typically will be semisubmerged this affects the modal parameters by fluid-structure interaction. Fluid surrounding a structure is known to retard the response and locally introduce an increase in mass and damping. These local changes yield a complex alteration of the modal parameters and this paper highlights these effects by a wave flume experiment conducted on a cantilever structure. The structure is a scaled offshore structure and its modal parameters are examined at different water levels ranging from dry state to 60 % submerged.
| Original language | English |
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| Title of host publication | Procedings of the International Conference on Noise and Vibration Engineering, ISMA |
| Number of pages | 11 |
| Publication date | 2018 |
| Publication status | Published - 2018 |
| Event | 28th International Conference on Noise and Vibration Engineering (ISMA 2018) - Leuven, Belgium Duration: 17 Sept 2018 → 19 Sept 2018 Conference number: 28 |
Conference
| Conference | 28th International Conference on Noise and Vibration Engineering (ISMA 2018) |
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| Number | 28 |
| Country/Territory | Belgium |
| City | Leuven |
| Period | 17/09/2018 → 19/09/2018 |