The work investigates the application of a novel frame model to reduce computational cost of the mistuning analysis of bladed disk systems. A full-scale finite element (FE) model of the bladed disk is considered as benchmark. The frame configuration for a single blade is identified through structural identification via an optimization process. The individual blades are then assembled by three-dimensional (3D) springs, whose parameters are determined by means of a calibration process. The dynamics of the novel beam frame assembly is also compared to those obtained from three state-of-the-art FE-based reduced order models (ROMs), namely: a lumped parameter approach, a Timoshenko beam assembly, and component mode synthesis (CMS)-based techniques with free and fixed interfaces. The development of these classical ROMs to represent the bladed disk is also addressed in detail. A methodology to perform the mistuning analysis is then proposed and implemented. A comparison of the modal properties and forced response dynamics between the aforementioned ROMs and the full-scale FE model is presented. The case study considered in this paper demonstrates that the beam frame assembly can predict the variations of the blade amplitude factors, and the results are in agreement with full-scale FE model. The CMS-based ROMs underestimate the maximum amplitude factor, while the results obtained from beam frame assembly are generally conservative. The beam frame assembly is four times more computationally efficient than the CMS fixed-interface approach. This study proves that the beam frame assembly can efficiently predict the mistuning behavior of bladed disks when low-order modes are of interest.
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June 2017
Research-Article
Novel Frame Model for Mistuning Analysis of Bladed Disk Systems
Jie Yuan,
Jie Yuan
Aerospace Engineering,
University of Bristol,
Bristol BS8 1TR, UK;
University of Bristol,
Bristol BS8 1TR, UK;
Aerospace Division,
Cranfield University,
Cranfield MK43 0AL, UK
Cranfield University,
Cranfield MK43 0AL, UK
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Fabrizio Scarpa,
Fabrizio Scarpa
Aerospace Engineering;
Dynamics and Control Research Group,
University of Bristol,
Bristol BS8 1TR, UK
e-mail: f.scarpa@bristol.ac.uk
University of Bristol,
Bristol BS8 1TR, UK
e-mail: f.scarpa@bristol.ac.uk
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Branislav Titurus,
Branislav Titurus
Aerospace Engineering;
Dynamics and Control Research Group,
University of Bristol,
Bristol BS8 1TR, UK
University of Bristol,
Bristol BS8 1TR, UK
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Giuliano Allegri,
Giuliano Allegri
Department of Aeronautics,
Imperial College London,
London SW7 2AZ, UK
Imperial College London,
London SW7 2AZ, UK
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Sophoclis Patsias,
Sophoclis Patsias
Rolls-Royce plc,
P. O. Box 31,
Derby DE24 8BJ, UK
P. O. Box 31,
Derby DE24 8BJ, UK
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Ramesh Rajasekaran
Ramesh Rajasekaran
Rolls-Royce plc,
P. O. Box 31,
Derby DE24 8BJ, UK
P. O. Box 31,
Derby DE24 8BJ, UK
Search for other works by this author on:
Jie Yuan
Aerospace Engineering,
University of Bristol,
Bristol BS8 1TR, UK;
University of Bristol,
Bristol BS8 1TR, UK;
Aerospace Division,
Cranfield University,
Cranfield MK43 0AL, UK
Cranfield University,
Cranfield MK43 0AL, UK
Fabrizio Scarpa
Aerospace Engineering;
Dynamics and Control Research Group,
University of Bristol,
Bristol BS8 1TR, UK
e-mail: f.scarpa@bristol.ac.uk
University of Bristol,
Bristol BS8 1TR, UK
e-mail: f.scarpa@bristol.ac.uk
Branislav Titurus
Aerospace Engineering;
Dynamics and Control Research Group,
University of Bristol,
Bristol BS8 1TR, UK
University of Bristol,
Bristol BS8 1TR, UK
Giuliano Allegri
Department of Aeronautics,
Imperial College London,
London SW7 2AZ, UK
Imperial College London,
London SW7 2AZ, UK
Sophoclis Patsias
Rolls-Royce plc,
P. O. Box 31,
Derby DE24 8BJ, UK
P. O. Box 31,
Derby DE24 8BJ, UK
Ramesh Rajasekaran
Rolls-Royce plc,
P. O. Box 31,
Derby DE24 8BJ, UK
P. O. Box 31,
Derby DE24 8BJ, UK
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received October 9, 2015; final manuscript received May 23, 2016; published online April 24, 2017. Assoc. Editor: John Yu.
J. Vib. Acoust. Jun 2017, 139(3): 031016 (13 pages)
Published Online: April 24, 2017
Article history
Received:
October 9, 2015
Revised:
May 23, 2016
Citation
Yuan, J., Scarpa, F., Titurus, B., Allegri, G., Patsias, S., and Rajasekaran, R. (April 24, 2017). "Novel Frame Model for Mistuning Analysis of Bladed Disk Systems." ASME. J. Vib. Acoust. June 2017; 139(3): 031016. https://doi.org/10.1115/1.4036110
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