Modified modal domain analysis of a bladed rotor using coordinate measurement machine data on geometric mistuning

Vinod Vishwakarma, Alok Sinha, Yasharth Bhartiya, Jeffery M. Brown

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations

    Abstract

    Modified Modal Domain Analysis (MMDA), a reduced order modeling technique, is applied to a geometrically mistuned integrally bladed rotor to obtain its natural frequencies, mode shapes and forced response. The geometric mistuning of blades is described in terms of proper orthogonal decomposition (POD) of the coordinate measurement machine (CMM) data. Results from MMDA are compared to those from the full (360 degrees) rotor ANSYS model. It is found that the MMDA can accurately predict natural frequencies, mode shapes, and forced response. The effects of the number of POD features and the number of tuned modes used as bases for model reduction are examined. Results from frequency mistuning approaches, fundamental mistuning model (FMM) and subset of nominal modes (SNM), are also generated and compared to those from full (360 degree) rotor ANSYS model. It is clearly seen that FMM and SNM are unable to yield accurate results whereas MMDA yields highly accurate results.

    Original languageEnglish (US)
    Title of host publicationASME Turbo Expo 2013
    Subtitle of host publicationTurbine Technical Conference and Exposition, GT 2013
    DOIs
    StatePublished - Dec 17 2013
    EventASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 - San Antonio, Tx, United States
    Duration: Jun 3 2013Jun 7 2013

    Publication series

    NameProceedings of the ASME Turbo Expo
    Volume7 B

    Other

    OtherASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013
    CountryUnited States
    CitySan Antonio, Tx
    Period6/3/136/7/13

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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  • Cite this

    Vishwakarma, V., Sinha, A., Bhartiya, Y., & Brown, J. M. (2013). Modified modal domain analysis of a bladed rotor using coordinate measurement machine data on geometric mistuning. In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 [GT2013-94393] (Proceedings of the ASME Turbo Expo; Vol. 7 B). https://doi.org/10.1115/GT2013-94393