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Modeling Geometric Mistuning of a Bladed Rotor: Modified Modal Domain Analysis

  • Alok SinhaEmail author
  • Yasharth Bhartiya
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 1011)

Abstract

Modified Modal Domain Analysis (MMDA) is a novel method for the development of a reduced-order model of a bladed rotor with geometric mistuning. This method utilizes proper orthogonal decomposition of Coordinate Measurement Machine (CMM) data on blades’ geometries, and sector analyses using ANSYS and solid modeling. In this paper, the algorithm to compute reduced-order mass and stiffness matrices from ANSYS sector analyses are provided and numerical results dealing with variations in natural frequencies and forced response are presented for different patterns of geometric mistuning.

Keywords

MMDA Geometric mistuning Sector Analysis Reduced order model 

References

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    Sinha, A., Hall, B., Cassenti, B., Hilbert, G.: Vibratory parameters of blades from coordinate measurement machine (CMM) data. ASME J. Turbomach. 130, 011013, January (2008) (Also GT2005–69004)Google Scholar
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    Sinha, A.: Reduced-order model of a bladed rotor with geometric mistuning. ASME J. Turbomach. 131(3), 031007, July (2009) (Also GT2007–27276)Google Scholar
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    Yang, M.T., Griffin, J.H.: A reduced order model of mistuning using a subset of nominal system modes. ASME J. Eng. Gas Turb. Power 123(4), 893–900 (1999)CrossRefGoogle Scholar
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    Bladh, R., Castanier, M.P., Pierre, C.: Component-mode-based reduced order modeling techniques for mistuned bladed disks – Part I: Theoretical models, Part II: Application. ASME J. Eng. Gas Turb. Power 123, 89–108 (2001)CrossRefGoogle Scholar
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    ANSYS Theory Manual, 12th edn., SAS IP Inc., 15-65-15-66 (1999)Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Mechanical and Nuclear EngineeringThe Pennsylvania State UniversityUniversity ParkUSA

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