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

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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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). https://doi.org/10.1115/GT2015-43952