Resonance Frequency Detuning In Regions Of High Modal Density

Abstract

Resonance frequency detuning is a piezoelectric vibration reduction approach for systems subject to swept frequency excitation. More specifically, the main focus is on reducing turbomachinery blade vibrations caused by transient passages through resonance. Previous research has been centered around performance for a single-degree-of-freedom system, an assumption that breaks down in regions of high modal density. This study provides a multi-degree-of-freedom analysis that is necessary due to these regions being present at the higher mode numbers of the blade, as well as at the lower mode numbers in the case of blade mistuning. Utilizing a two-degree-of-freedom system with a small stiffness element coupling the two masses, this paper investigates the effects that some of the key parameters, such as the piezoelectric coupling coefficient, modal separation, and the modal amplitudes of adjacent peaks, have on the optimal switch triggers.

Publication Date

1-1-2017

Publication Title

25th AIAA/AHS Adaptive Structures Conference, 2017

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2017-1439

Socpus ID

85089161103 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85089161103

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