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)
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

Publication series

NameProceedings of the ASME Turbo Expo
Volume7A

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 (Proceedings of the ASME Turbo Expo; 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. American Society of Mechanical Engineers (ASME), 2015. (Proceedings of the ASME Turbo Expo).
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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. Proceedings of the ASME Turbo Expo, 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. American Society of Mechanical Engineers (ASME), 2015. (Proceedings of the ASME Turbo Expo; Vol. 7A).

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. American Society of Mechanical Engineers (ASME). 2015. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/GT2015-43952