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Proceedings Paper

Anomaly amplification in dynamic response of damaged periodic structures using piezoelectric networking
Author(s): J. Zhao; J. Tang
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Paper Abstract

Damage detection of spatially periodic structures is challenging, as such structures may have clustered natural frequencies, which makes it difficult to ascertain the damage-induced change of individual vibration frequency/mode. Moreover, the inevitable mistuning (i.e., substructure-to-substructure difference) in these structures further complicates the problem because it results in variations in natural frequencies/modes even under healthy condition. In this paper, taking advantage of the unique characteristics of periodic structures, we explore the possibility of using piezoelectric networking to temporarily induce or intensify the vibration localization in a mistuned periodic structure. The intensified vibration localization will cause drastic change in dynamic response patterns upon damage occurrence to highlight the damage effect. We integrate identical piezoelectric inductive circuits onto all substructures, and couple the circuits with identical capacitance elements, which retains the nominal periodicity of the system. Through analytical studies and parametric investigations, the circuitry inductance and coupling capacitance values that lead to intensified vibration localization are identified. Our analysis indicates that this proposed scheme can significantly amplify the response anomaly for periodic structures when damage occurs.

Paper Details

Date Published: 12 April 2010
PDF: 12 pages
Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 76432G (12 April 2010); doi: 10.1117/12.847760
Show Author Affiliations
J. Zhao, Univ. of Connecticut (United States)
J. Tang, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 7643:
Active and Passive Smart Structures and Integrated Systems 2010
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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