Blade manufacturing tolerances definition for a mistuned industrial bladed disk

Evangéline Capiez-Lernout (1) , Christian Soize (1) , J.-P. Lombard (2) , Celine Dupont (2) , E. Seinturier (2)

1 LaM - Laboratoire de Mécanique
2 SNECMA Villaroche [Moissy-Cramayel]

This paper deals with the characterization of the blade manufacturing geometric tolerances in order to get a given level of amplification in the forced response of a mistuned bladed-disk. It is devoted to an industrial application in order to validate the theory previously developed and in order to show that this theory is suited to any industrial bladed-disks. It should be noted that the development of an adapted methodology for solving the inverse problem, in order to characterize the manufacturing tolerances, is an important challenge for industries in this area.This theory is based on the use of a nonparametric probabilistic model of random uncertainties in the blade. The dispersion parameters controlling the nonparametric model are estimated as a function of the geometric tolerances. Such an identification is carried out in a computational context by using the numerical Monte Carlo simulation and by using the reduced model method presented. The industrial application is devoted to the mistuning analysis of a 22 blades wide chord fan stage.

Mots clés: unertainty quantification; bladed disk; mistuning; blade tolerances; nonparametric probabilistic method; statistical inverse method; random matrix; structural dynamics; mistuned bladed-disk

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Probabilités [math.PR]

Evangéline Capiez-Lernout, Christian Soize, J.-P. Lombard, Celine Dupont, E. Seinturier. Blade manufacturing tolerances definition for a mistuned industrial bladed disk. ASME Turbo Expo: Land, Sea and Air 2004, Jun 2004, Vienna, Austria. GT-2004-53356, pp. 1-12. ⟨hal-00688121⟩