Effects of geometrical nonlinearities for a rotating intentionally mistuned bladed-disk

Abstract : The present paper describes a computational methodology adapted to the analysis of the nonlinear dynamical behavior of a detuned bladed disk. The context of the analysis is the following : (1) the detuning is taken into account by voluntarily breaking the cyclic symmetry of the structure with the use of a pattern constituted of different blade types; (2) the structure is assumed to undergo large strain/displacements induced by the geometrical nonlinear effects; (3) the prestresses and the gyroscopic effects induced by the rotating motion are considered in the nonlinear dynamical analysis. The computational strategy has to be compatible with the industrial context. Consequently, a particular attention is paid to the construction of an adapted nonlinear reduced-order model. Finally, the proposed methodology is applied on a complex bladed disk structure.
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Submitted on : Tuesday, September 18, 2018 - 6:45:29 PM
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Anthony Picou, Evangéline Capiez-Lernout, Christian Soize, Moustapha Mbaye. Effects of geometrical nonlinearities for a rotating intentionally mistuned bladed-disk. Conference on Noise and Vibration Engineering (ISMA 2018), Sep 2018, Leuven, Belgium. pp.1-11. ⟨hal-01876795⟩

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