Anomaly amplification in dynamic response of damaged periodic structures using piezoelectric networking

J. Zhao; J. Tang

doi:10.1117/12.847760

12 April 2010 Anomaly amplification in dynamic response of damaged periodic structures using piezoelectric networking

J. Zhao, J. Tang

Proceedings Volume 7643, Active and Passive Smart Structures and Integrated Systems 2010; 76432G (2010) https://doi.org/10.1117/12.847760
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

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.

Citation Download Citation

J. Zhao and J. Tang "Anomaly amplification in dynamic response of damaged periodic structures using piezoelectric networking", Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 76432G (12 April 2010); https://doi.org/10.1117/12.847760

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