Experimental investigation of vibration localization in bladed disks, Part II: Forced response

Marlin J. Kruse, Christophe Pierre

Research output: Contribution to journalConference articlepeer-review

13 Scopus citations

Abstract

The results of an experimental investigation on the effects of random blade mistuning on the forced dynamic response of bladed disks are reported. Two experimental specimens are considered: a nominally periodic twelve-bladed disk with equal blade lengths, and the corresponding mistuned bladed disk, which features slightly different blades of random lengths. Both specimens are subject to traveling-wave excitations delivered by piezo-electric actuators. The primary aim of the experiment is to demonstrate the occurrence of an increase in forced response blade amplitudes due to mistuning, and to verify analytical predictions about the magnitude of these increases. In particular, the impact of localized mode shapes, engine order excitation, and disk structural coupling on the sensitivity of forced response amplitudes to blade mistuning is reported. This work reports one of the first systematic experiments carried out to demonstrate and quantify the effect of mistuning on the forced response of bladed disks.

Original languageEnglish
JournalAmerican Society of Mechanical Engineers (Paper)
StatePublished - 1997
EventProceedings of the 1997 International Gas Turbine & Aeroengine Congress & Exposition - Orlando, FL, USA
Duration: 2 Jun 19975 Jun 1997

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