Resonance suppression in multi-degree-of-freedom rotating flexible structures using order-tuned absorbers

Serif Gozen, Brian J. Olson, Steven W. Shaw, Christophe Pierre

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

This paper considers the dynamic response and order-tuning of vibration absorbers fitted to a rotating flexible structure under traveling wave (TW) engine order excitation. Of specific interest is the extension of previous results on the so-called no-resonance zone, that is, a region in linear tuning parameter space in which the coupled structure/absorber system does not experience resonance over all rotation speeds. The no-resonance feature was shown to exist for cyclic rotating structures with one structural and one absorber degree of freedom (DOF) per sector. This work uses a higher-fidelity structural model to investigate the effects of higher modes on the cyclically-coupled system. It is shown that the no-resonance zone is replaced by a resonance-suppression zone in which one structural mode is suppressed, but higher-order resonances still exist with the addition of the absorbers. The results are general in the sense that one vibration mode can be eliminated using a set of identically-tuned absorbers on a rotating structure with arbitrarily many DOFs per sector.

Original languageEnglish
Article number61016
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume134
Issue number6
DOIs
StatePublished - 2012

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