Nonlinear geometric analysis of a mistuned bladed disk

Evangéline Capiez-Lernout 1 Christian Soize 1 M Mbaye 2
1 MSME - Laboratoire de Modélisation et Simulation Multi Echelle
2 Turbomeca
Abstract : This paper deals with the dynamical analysis and uncertainty quantification of a mistuned industrial rotating integrally bladed disk, for which the operating regime under consideration takes into account the nonlinear geometric effects induced by large displacements and deformations. First, a dedicated mean nonlinear reduced-order model of the tuned structure is explicitly constructed using three-dimensional solid finite elements. The random nature of the mistuning is then modeled by using the nonparametric probabilistic approach extended to the nonlinear geometric context. Such a computational strategy provides an efficient tool, which is applied to a computational model of an industrial centrifugal compressor with a large number of degrees of freedom. This allows for putting in evidence some new complex dynamical behaviors.
Keywords : vibrations geometric non-linearities mistuning uncertainty quantification
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Conference papers
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Evangéline Capiez-Lernout, Christian Soize, M Mbaye. Nonlinear geometric analysis of a mistuned bladed disk. Euromech Conference on Coupling and Nonlinear %Interactions in Rotating Machinery (Euromech 573), Aug 2015, Lyon, France. pp.1-2. ⟨hal-01192568⟩

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