CREEM2020

CREEM2020

Redução de Vibração em uma Viga Utilizando Neutralizadores Dinâmicos Viscoelásticos Através de Elementos Finitos

Submission Author: Gabriel de Almeida Pereira , PR , Brazil
Co-Authors: Gabriel de Almeida Pereira, Carlos Alberto Bavastri, Jucélio Tomás Pereira, Thiago da Silva
Presenter: Gabriel de Almeida Pereira

doi://10.26678/ABCM.CREEM2020.CRE2020-0065

 

Abstract

. Viscoelastic dynamic absorbers for vibration control can demand expensive experimental tests. Commercial finite element (FEM) software packages viscoelastic material models very simple or very complex, and required coefficients are not usually available for the user. This work aims to propose a simple methodology, using the commercial software ANSYS to predict the dynamic behavior of composite structures with those materials. For this, the work is carried out in two steps. The first is to model an MVE-mass system, result of which is compared with a single degree-of-freedom analytical model. The second, is to design an optimum viscoelastic absorber to reduce the vibration amplitude of a MGL structure, using a proprietary software, Lavibs-ND, and compare the associated prediction with an equivalent response obtained by ANSYS. The viscoelastic material properties are introduced through a table, once they are frequency and temperature functions. The results obtained from the analytical model and the software Lavibs-ND are compared with those obtained by ANSYS. The comparison shows that the Ansys model is consistent, being promisor to predict the dynamic behavior from the structures of concern.

Keywords

Vibrations, Vibration control, Passive Vibration Control, Neutralizer viscoelastic, Dynamic neutralizers, Optimization, viscoelastic materials, Finite Elements

 

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