Order-Tuned and impact absorbers for rotating flexible structures

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This work describes analytical and simulation investigations of order-tuned and impact vibration absorbers that are used to attenuate vibrations of flexible blades in a bladed disk assembly. These absorbers exploit the centrifugal field arising from rotation so that for small amplitudes they are tuned to a given order of excitation, and they use impacts to dissipate energy at larger vibration amplitudes. Analytical results are obtained for idealized models; these show that for impact-free motion optimal reduction of blade vibrations and robustness are achieved by tuning the absorbers slightly below the excitation order. During impact operation, absorber performance is largely insensitive to the tuning order, but depends on the absorber mass and impact properties. These results offer a basic understanding of the dynamics of individual blades fitted with order-tuned and impact vibration absorbers, and serve as a first step to the investigation of more realistic models.

Original languageEnglish
Title of host publicationProceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Pages612-621
Number of pages10
StatePublished - 2006
Event11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11 - Honolulu, HI, United States
Duration: 26 Feb 20062 Mar 2006

Publication series

NameProceedings of the 11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Volume2

Conference

Conference11th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-11
Country/TerritoryUnited States
CityHonolulu, HI
Period26/02/062/03/06

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