Vibratory behavior prediction of mistuned stator vane clusters: An industrial application

•SDK method is a robust and efficient approach to simulate unreliable structures.•SDK method provides predictive results for a reasonable computation cost.•Industrial model tests highlight a thousand time reduction factor compared to a standard Monte Carlo method. Geometric and material dispersions...

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Bibliographic Details
Published in:Computers & structures 2018-02, Vol.196, p.12-23
Main Authors: Philippe, J., Thouverez, F., Blanc, L., Gruin, M.
Format: Article
Language:English
Subjects:
Behavior
Blade vibration
Density
Disks
Double modal synthesis
Industrial applications
Karhunen-Loève
Mistuning
Mistuning (turbomachinery)
Polynomial chaos
Sensitivity
Stators
Studies
Symmetry
Uncertainties
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Summary:•SDK method is a robust and efficient approach to simulate unreliable structures.•SDK method provides predictive results for a reasonable computation cost.•Industrial model tests highlight a thousand time reduction factor compared to a standard Monte Carlo method. Geometric and material dispersions of bladed disks imply some mistuning effects, which result in both the loss of cyclic symmetry properties and a vibratory response amplification in areas of high modal density. These conditions complicate the prediction of vibratory behavior, causing high modal density and extreme sensitivity to mistuning. A non-intrusive spectral stochastic method has been developed to predict the vibratory behavior of a mistuned stator vane. To apply this method to an industrial model, a Karhunen-Loève expansion and a double modal synthesis method have been combined with the stochastic method. The complete method was first tested on a simple academic model and then on an industrial stator vane sector.
ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2017.11.003