Operational Modal Analysis and Fluid-Structure Interaction

M. Vigsø, T. Kabel, M. Tarpø, Rune Brincker, C. Georgakis

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    524 Downloads (Pure)


    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 publicationProcedings of the International Conference on Noise and Vibration Engineering, ISMA
    Number of pages11
    Publication date2018
    Publication statusPublished - 2018
    Event28th International Conference on Noise and Vibration Engineering (ISMA 2018) - Leuven, Belgium
    Duration: 17 Sept 201819 Sept 2018
    Conference number: 28


    Conference28th International Conference on Noise and Vibration Engineering (ISMA 2018)


    Dive into the research topics of 'Operational Modal Analysis and Fluid-Structure Interaction'. Together they form a unique fingerprint.

    Cite this