Novel frame model for mistuning analysis of bladed disk systems
Novel frame model for mistuning analysis of bladed disk systems
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.
Yuan, J.
4bcf9ce8-3af4-4009-9cd0-067521894797
Scarpa, F.
684472c3-1a28-478a-a388-5fd896986c1d
Titurus, B.
71f65324-d414-47a4-8bca-ef61fc9641bc
Allegri, G.
8dd43a78-5f53-472f-853a-1b2fd7b129e4
Patsias, S.
e7e4a982-00c2-4025-ba71-32c101489b7c
Rajasekaran, R.
c5f6d9b9-8517-49e1-afc5-5830d2d1390d
1 June 2017
Yuan, J.
4bcf9ce8-3af4-4009-9cd0-067521894797
Scarpa, F.
684472c3-1a28-478a-a388-5fd896986c1d
Titurus, B.
71f65324-d414-47a4-8bca-ef61fc9641bc
Allegri, G.
8dd43a78-5f53-472f-853a-1b2fd7b129e4
Patsias, S.
e7e4a982-00c2-4025-ba71-32c101489b7c
Rajasekaran, R.
c5f6d9b9-8517-49e1-afc5-5830d2d1390d
Yuan, J., Scarpa, F., Titurus, B., Allegri, G., Patsias, S. and Rajasekaran, R.
(2017)
Novel frame model for mistuning analysis of bladed disk systems.
Journal of Vibration and Acoustics, Transactions of the ASME, 139 (3), [VIB-15-1430].
(doi:10.1115/1.4036110).
Abstract
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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e-pub ahead of print date: 17 April 2017
Published date: 1 June 2017
Additional Information:
The authors would like to acknowledge the support of Rolls-Royce plc for the support of this research through the Composites University Technology Centre (UTC) at the University of Bristol, UK. Special acknowledgment goes also to the Strategic Investment in Low carbon Engine Technology (SILOET) Programme supported by Rolls-Royce plc and Technology Strategy Board (TSB), and to the China Scholarship Council.
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Local EPrints ID: 479221
URI: http://eprints.soton.ac.uk/id/eprint/479221
PURE UUID: 21990437-0691-4eae-b7db-abcabd8ffc95
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Date deposited: 20 Jul 2023 16:46
Last modified: 17 Mar 2024 04:20
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Author:
J. Yuan
Author:
F. Scarpa
Author:
B. Titurus
Author:
G. Allegri
Author:
S. Patsias
Author:
R. Rajasekaran
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