Intentional mistuning optimization of nonlinear mistuned bladed-disks

Evangéline Capiez-Lernout (1) , Christian Soize (1)

1 MSME - Laboratoire Modélisation et Simulation Multi-Echelle

One major industrial challenge is to consider the detuning as a technological means to reduce the dynamical amplifications induced by mistuning. A full analysis of the detuning optimization of mistuned bladed-disks with finite displacements is carried out on a 12 bladed-disk finite element model. The paper is based on a computational methodology previously developed by the authors. We then have to be very careful with the construction of an adapted scalar quantity of interest for defining the detuning optimization problem. Direct computations allowing for all possible detuned configurations to be considered allow for obtaining a full data basis. A meticulous post-processing shows the existence of a few detuned configurations, that inhibits the mistuning amplification effects of the pure mistuned bladed-disk.

Keywords: intentional mistuning -detuning; mistuning; geometrical nonlinearities; optimization

Domains: Engineering Sciences [physics]; Mechanics [physics.med-ph]; Structural mechanics [physics.class-ph]; Engineering Sciences [physics]; Mechanics [physics.med-ph]; Vibrations [physics.class-ph]; Engineering Sciences [physics]

Evangéline Capiez-Lernout, Christian Soize. Intentional mistuning optimization of nonlinear mistuned bladed-disks. 25 ème Congrès Français de Mécanique, CFM 2022, Aug 2022, Nantes, France. pp.1-6. ⟨hal-03799292⟩