A reduced order modeling technique for mistuned bladed disks

M. P. Castanier, G. Óttarsson, C. Pierre

Research output: Contribution to journalArticlepeer-review

253 Scopus citations

Abstract

The analysis of the response statistics of mistuned turbomachinery rotors requires an expensive Monte Carlo simulation approach. Simple lumped parameter models capture basic localization effects but do not represent well actual engineering structures without a difficult parameter identification. Current component mode analysis techniques generally require a minimum number of degrees of freedom which is too large for running Monte Carlo simulations at a reasonable cost. In the present work, an order reduction method is introduced which is capable of generating reasonably accurate, very low order models of tuned or mistuned bladed disks. This technique is based on component modes of vibration found from a finite element analysis of a single disk-blade sector. It is shown that the phenomenon of mode localization is well captured by the reduced order modeling technique.

Original languageEnglish
Pages (from-to)439-447
Number of pages9
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume119
Issue number3
DOIs
StatePublished - Jul 1997

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