A great deal of research has been conducted on the effects of small random variations in structural properties, known as mistuning, in single stage bladed disks. Due to the inherent randomness of mistuning and the large dimensionality of the models of industrial bladed disks, a reduced order modeling approach is required to understand the effects of mistuning on a particular bladed disk design. Component mode mistuning (CMM) is an efficient compact reduced order modeling method that was developed to handle this challenge in single stage bladed disks. In general, there are multiple stages in bladed disk assemblies, and it has been demonstrated that for certain frequency ranges accurate modeling of the entire bladed disk assembly is required because multistage modes exist. In this work, a statistical characterization of structural mistuning in multistage bladed disks is carried out. The results were obtained using CMM combined with a multistage modeling approach previously developed. In addition to the statistical characterization, a new efficient classification method is detailed for characterizing the properties of a mode. Also, the effects of structural mistuning on the characterization of the mode is explored.
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e-mail: kdsouza@umich.edu
e-mail: epureanu@umich.edu
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January 2012
Research Papers
A Statistical Characterization of the Effects of Mistuning in Multistage Bladed Disks
Kiran X. D’Souza,
Kiran X. D’Souza
Research Fellow
Department of Mechanical Engineering,
e-mail: kdsouza@umich.edu
University of Michigan
, Ann Arbor, MI 48109-2125
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Bogdan I. Epureanu
Bogdan I. Epureanu
Department of Mechanical Engineering,
e-mail: epureanu@umich.edu
University of Michigan
, Ann Arbor, MI 48109-2125
Search for other works by this author on:
Kiran X. D’Souza
Research Fellow
Department of Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125e-mail: kdsouza@umich.edu
Bogdan I. Epureanu
Department of Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125e-mail: epureanu@umich.edu
J. Eng. Gas Turbines Power. Jan 2012, 134(1): 012503 (8 pages)
Published Online: November 4, 2011
Article history
Received:
April 14, 2011
Revised:
April 19, 2011
Online:
November 4, 2011
Published:
November 4, 2011
Citation
D’Souza, K. X., and Epureanu, B. I. (November 4, 2011). "A Statistical Characterization of the Effects of Mistuning in Multistage Bladed Disks." ASME. J. Eng. Gas Turbines Power. January 2012; 134(1): 012503. https://doi.org/10.1115/1.4004153
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