Operational Modal Analysis and Fluid-Structure Interaction

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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 languageEnglish
Title of host publicationProceedings of the International Conference on Noise and Vibration Engineering : ISMA2018-USD2018
Number of pages11
Place of publicationLeuven
PublisherKU Leuven, Department Werktuigkunde
Publication year2018
Article number522
ISBN (print)978-907380299-5
Publication statusPublished - 2018
EventInternational Conference on Noise and Vibration Engineering - Leuven, Belgium
Duration: 17 Sep 201819 Sep 2018
Conference number: 28


ConferenceInternational Conference on Noise and Vibration Engineering

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