A compact, generalized component mode mistuning representation for modeling bladed disk vibration

Sang Ho Lim, Ronnie Bladh, Matthew P. Castanier, Christophe Pierre

Research output: Contribution to journalConference articlepeer-review

43 Scopus citations

Abstract

The forced response of a mistuned bladed disk can be significantly amplified compared to that of a tuned bladed disk. Various reduced-order models have been studied to predict the response of mistuned bladed disks. Most of these models have been tested only for simple mistuning cases that may not be realistic for actual systems. In this paper, a new approach to generate a general reduced-order model for a mistuned system is presented. From this general formulation, a compact reduced-order model for small blade mistuning is also derived in which mistuning is projected to tuned-system normal modes using modal participation factors of cantilevered-blade component modes. The presented mistuning projection method can estimate the effects of complicated mistuning easily from measurable modal mistuning values of mistuned blades.

Original languageEnglish
Pages (from-to)1359-1380
Number of pages22
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume2
StatePublished - 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Norfolk, VA, United States
Duration: 7 Apr 200310 Apr 2003

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