Mistuning analysis of a detuned bladed-disk with geometrical nonlinearities

Anthony Picou (1, 2) , Evangéline Capiez-Lernout (1) , Christian Soize (1) , Moustapha Mbaye (2)

1 MSME - Laboratoire de Modélisation et Simulation Multi Echelle
2 Safran Tech

This work concerns the nonlinear numerical analysis of mis-tuned blades for a rotating detuned bladed-disk structure with geometrical nonlinearities. The detuning phenomenon is taken into account through a deterministic approach by modifying material properties of some blades. A nonlinear reduced-order model is obtained by constructing a basis using a double projection method. The mistuning uncertainties are implemented through a nonparametric probabilistic approach for which the level of uncertainties is controlled by a hyperparameter. A numerical application is carried out on a bladed-disk structure made up of 24 blades whose finite element model has about 800,000 dofs putting in evidence complex dynamic behaviors.

Domaines: Mécanique [physics.med-ph]; Vibrations [physics.class-ph]; Probabilités [math.PR]; Statistiques [math.ST]

Anthony Picou, Evangéline Capiez-Lernout, Christian Soize, Moustapha Mbaye. Mistuning analysis of a detuned bladed-disk with geometrical nonlinearities. ASME Turbo Expo 2019, Jun 2019, Phoenix, Arizona, United States. pp.1-10. ⟨hal-02175580⟩