Investigation of the combined effects of intentional and random mistuning on the forced response of bladed disks

Matthew P. Castanier, Christophe Pierre

Research output: Contribution to conferencePaperpeer-review

72 Scopus citations

Abstract

The maximum blade forced response amplitudes for mistuned bladed disks are generally much greater than those of their tuned counterparts. However, it is known that the ratio of mistuned to tuned maximum amplitudes — the amplitude magnification — is often largest at a relatively small level of mistuning. Increasing the level of mistuning beyond this critical value actually leads to a decrease in the amplitude magnification. In this study, the use of "intentional mistuning" to reduce the amplitude magnification of an industrial rotor is investigated. Intentional mistuning is introduced into a reduced order model of a 29-blade industrial rotor by varying the nominal blade stiffnesses in harmonic patterns. In addition to this intentional mistuning, the unavoidable, random mistuning of the blades is included in the model as usual. The individual and combined effects of intentional and random mistuning on the statistics of the forced response are examined. It is seen that intentional mistuning can greatly reduce the rotor’s sensitivity to random mistuning.

Original languageEnglish
DOIs
StatePublished - 1998
Event34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 1998 - Cleveland, United States
Duration: 13 Jul 199815 Jul 1998

Conference

Conference34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 1998
Country/TerritoryUnited States
CityCleveland
Period13/07/9815/07/98

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