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Author(s): C. M. A. Vasques
B. Mace
P. Gardonio
J. D. Rodrigues
Title: Finite element modelling of beams with arbitrary active constrained layer damping treatments
Issue Date: 2004
Abstract: This paper concerns arbitrary active constrained layer damping (ACLD) treatmentsapplied to beams. In order to suppress vibration, hybrid active-passive treatmentscomposed of piezoelectric and viscoelastic layers are mounted on the substrate beamstructure. These treatments combine the high capacity of passive viscoelastic materialsto dissipate vibrational energy at high frequencies with the active capacity ofpiezoelectric materials at low frequencies. The aim of this research is the developmentof a generic analytical formulation that can describe these hybrid couplings inan accurate and consistent way. The analytical formulation considers a partial layerwisetheory, with an arbitrary number of layers, both viscoelastic and piezoelectric,attached to both surfaces of the beam. A fully coupled electro-mechanical theory formodelling the piezoelectric layers is considered. The equations of motion, electriccharge equilibrium and boundary conditions are presented. A one-dimensional finiteelement (FE) model is developed, with the nodal degrees of freedom being the axialand transverse displacements and the rotation of the centreline of the host beam, therotations of the individual layers and the electric potentials of each piezoelectric layer.The damping behavior of the viscoelastic layers is modeled by the complex modulusapproach. Three frequency response functions were measured experimentally andevaluated numerically: acceleration per unit force, acceleration per unit voltage intothe piezoelectric actuator and induced voltage per unit force. The numerical resultsare presented and compared with experimental results to validate the FE model.
Subject: Engenharia mecânica, Engenharia mecânica
Mechanical engineering, Mechanical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia mecânica
Engineering and technology::Mechanical engineering
Source: Proceedings of the Seventh International Conference on Computational Structures Technology
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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