Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis

Vinod Vishwakarma, Alok Sinha

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

    Abstract

    Modified Modal Domain Analysis (MMDA) is a method to generate an accurate reduced order model (ROM) of a bladed disk with geometric mistuning. An algorithm based on MMDA ROM and a state observer is developed to estimate forcing functions for synchronous (including integer multiples) conditions from the dynamic responses obtained at few nodal locations of blades. The method is tested on a simple springmass model, finite element model (FEM) of a geometrically mistuned academic rotor and FEM of a bladed rotor of an industrial scale transonic research compressor. The accuracy of the forcing function estimation algorithm is examined by varying the order of reduced-order model and the number of vibration output signals.

    Original languageEnglish (US)
    Title of host publicationStructures and Dynamics
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Volume7A
    ISBN (Electronic)9780791856765, 9780791856765
    DOIs
    StatePublished - Jan 1 2015
    EventASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 - Montreal, Canada
    Duration: Jun 15 2015Jun 19 2015

    Other

    OtherASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015
    CountryCanada
    CityMontreal
    Period6/15/156/19/15

    Fingerprint

    Rotors
    Dynamic response
    Compressors

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

    Cite this

    Vishwakarma, V., & Sinha, A. (2015). Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis. In Structures and Dynamics (Vol. 7A). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2015-43952
    Vishwakarma, Vinod ; Sinha, Alok. / Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis. Structures and Dynamics. Vol. 7A American Society of Mechanical Engineers (ASME), 2015.
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    abstract = "Modified Modal Domain Analysis (MMDA) is a method to generate an accurate reduced order model (ROM) of a bladed disk with geometric mistuning. An algorithm based on MMDA ROM and a state observer is developed to estimate forcing functions for synchronous (including integer multiples) conditions from the dynamic responses obtained at few nodal locations of blades. The method is tested on a simple springmass model, finite element model (FEM) of a geometrically mistuned academic rotor and FEM of a bladed rotor of an industrial scale transonic research compressor. The accuracy of the forcing function estimation algorithm is examined by varying the order of reduced-order model and the number of vibration output signals.",
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    Vishwakarma, V & Sinha, A 2015, Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis. in Structures and Dynamics. vol. 7A, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015, Montreal, Canada, 6/15/15. https://doi.org/10.1115/GT2015-43952

    Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis. / Vishwakarma, Vinod; Sinha, Alok.

    Structures and Dynamics. Vol. 7A American Society of Mechanical Engineers (ASME), 2015.

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

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    Vishwakarma V, Sinha A. Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis. In Structures and Dynamics. Vol. 7A. American Society of Mechanical Engineers (ASME). 2015 https://doi.org/10.1115/GT2015-43952