Vibration Characteristics Investigation of Hard-Coated Mistuned Blisk With Multipackets by Lumped Parameter Model

Abstract

To improve the performance and reduce the vibration of the mistuned blisk, a novel approach combining hard-coating and multipackets is presented. First, the dynamical models of the blisk without hard-coating and multipackets, the hard-coated mistuned blisk without multipackets, and the hard-coated mistuned blisk with multipackets are established based on the lumped parameter model (LPM). Then, the solved results are compared with those previous literature to validate the feasibility and correctness of the proposed models. Furthermore, the characteristics of the natural frequencies and the vibration responses for the mistuned blisk is investigated by proposed LPMs. Finally, the effect of the hard-coating and multipackets on the vibration characteristics for the mistuned blisk are discussed. The obtained results manifest that the vibration response of the mistuned blisk can be further suppressed when the hard-coating and the multipackets are considered simultaneously compared with only the hard-coating or multipackets considered, which provides useful guidance on the vibration reduction for the mistuned blisk.