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Using passive techniques for vibration damping in mechanical systems

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Author(s): Steffen Jr Valder | Rade Domingos A. | Inman Daniel J.

Journal: Journal of the Brazilian Society of Mechanical Sciences
ISSN 0100-7386

Volume: 22;
Issue: 3;
Start page: 411;
Date: 2000;
Original page

Keywords: Passive techniques | shunted piezoelectric | dynamic vibration absorber

ABSTRACT
This paper examines two passive techniques for vibration reduction in mechanical systems: the first one is based on dynamic vibration absorbers (DVAs) and the second uses resonant circuit shunted (RCS) piezoceramics. Genetic algorithms are used to determine the optimal design parameters with respect to performance indexes, which are associated with the dynamical behavior of the system over selected frequency bands. The calculation of the frequency response functions (FRFs) of the composite structure (primary system + DVAs) is performed through a substructure coupling technique. A modal technique is used to determine the frequency response function of the structure containing shunted piezoceramics which are bonded to the primary structure. The use of both techniques simultaneously on the same structure is investigated. The methodology developed is illustrated by numerical applications in which the primary structure is represented by simple Euler-Bernoulli beams. However, the design aspects of vibration control devices presented in this paper can be extended to more complex structures.
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