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

Vinod Vishwakarma; Alok Sinha

doi:10.1115/GT2015-43952

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 proceeding › Conference 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 language	English (US)
Title of host publication	Structures and Dynamics
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791856765, 9780791856765
DOIs	https://doi.org/10.1115/GT2015-43952
State	Published - 2015
Event	ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 - Montreal, Canada Duration: Jun 15 2015 → Jun 19 2015

Publication series

Name	Proceedings of the ASME Turbo Expo
Volume	7A

Other

Other	ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015
Country/Territory	Canada
City	Montreal
Period	6/15/15 → 6/19/15

All Science Journal Classification (ASJC) codes

General Engineering

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10.1115/GT2015-43952

Cite this

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title = "Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis",

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.",

author = "Vinod Vishwakarma and Alok Sinha",

note = "Publisher Copyright: Copyright {\textcopyright} 2015 by ASME.; ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 ; Conference date: 15-06-2015 Through 19-06-2015",

year = "2015",

doi = "10.1115/GT2015-43952",

language = "English (US)",

series = "Proceedings of the ASME Turbo Expo",

publisher = "American Society of Mechanical Engineers (ASME)",

booktitle = "Structures and Dynamics",

}

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

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T1 - Estimation of forcing function for a geometrically mistuned bladed rotor via modified modal domain analysis

AU - Vishwakarma, Vinod

AU - Sinha, Alok

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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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M3 - Conference contribution

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T3 - Proceedings of the ASME Turbo Expo

BT - Structures and Dynamics

PB - American Society of Mechanical Engineers (ASME)

T2 - ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015

Y2 - 15 June 2015 through 19 June 2015

ER -

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

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