In the field of turbomachinery, the assumption of cyclic symmetry of the different rotor stages is usually made to reduce the required computational resources. However, in reality small random blade-to-blade variations, known as mistuning, appear due to manufacturing tolerances, wear during use, etc. and disturb the dynamic behavior of bladed disks. This work proposes a new combination of two modeling techniques, incorporating the advantages of both methods to model more precisely the mistuned response of bladed disks with reduced computational time. In particular, we combine the reduced-order modeling technique based on cyclic symmetry with the nonparametric approach for modeling uncertainties in order to introduce them directly in the modal space of the blades of the structure and thus reduce the size of the model. We perform a numerical comparison between the frequency response function of a bladed structure. The proposed method allows to retrieve the results of the nonparametric approach while reducing the size of the structural matrices.
Skip Nav Destination
ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 17–20, 2014
Buffalo, New York, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4641-4
PROCEEDINGS PAPER
Modeling of Uncertainties in Bladed Disks Using a Nonparametric Approach
Florence Nyssen,
Florence Nyssen
University of Liege, Liege, Belgium
Search for other works by this author on:
Maarten Arnst,
Maarten Arnst
University of Liege, Liege, Belgium
Search for other works by this author on:
Jean-Claude Golinval
Jean-Claude Golinval
University of Liege, Liege, Belgium
Search for other works by this author on:
Florence Nyssen
University of Liege, Liege, Belgium
Maarten Arnst
University of Liege, Liege, Belgium
Jean-Claude Golinval
University of Liege, Liege, Belgium
Paper No:
DETC2014-35025, V008T11A068; 9 pages
Published Online:
January 13, 2015
Citation
Nyssen, F, Arnst, M, & Golinval, J. "Modeling of Uncertainties in Bladed Disks Using a Nonparametric Approach." Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 26th Conference on Mechanical Vibration and Noise. Buffalo, New York, USA. August 17–20, 2014. V008T11A068. ASME. https://doi.org/10.1115/DETC2014-35025
Download citation file:
8
Views
0
Citations
Related Proceedings Papers
Related Articles
A Statistical Characterization of the Effects and Interactions of Small and Large Mistuning on Multistage Bladed Disks
J. Eng. Gas Turbines Power (April,2020)
Reduced Order Modeling and Vibration Analysis of Mistuned Bladed Disk Assemblies With Shrouds
J. Eng. Gas Turbines Power (July,1999)
Identification of Frequency-Dependent Parameters in a Flexible Rotor System
J. Eng. Gas Turbines Power (July,2006)
Related Chapters
Introduction
Turbine Aerodynamics: Axial-Flow and Radial-Flow Turbine Design and Analysis
Surface Analysis and Tools
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
On the Evaluation of Thermal and Mechanical Factors in Low-Speed Sliding
Tribology of Mechanical Systems: A Guide to Present and Future Technologies