Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Dynamic behavior of viscoelastic rotors – A comparative analysis
Submission Author:
Zoroastro Fernandes Filho , BA , Brazil
Co-Authors:
Zoroastro Fernandes Filho, Ubatan Almeida Miranda, Alex Álisson Bandeira Santos
Presenter: Zoroastro Fernandes Filho
doi://10.26678/ABCM.COBEM2017.COB17-2408
Abstract
Viscoelastic materials are widely used in industry and their modelling techniques are very useful for application in vibration damping problems linked with rotors and structural systems, contributing to the development of compact and efficient mechanical models. For the reduction of the rotors’ weight, polymeric materials may be including in its construction. In view of this reality, the target of this paper is to present two theoretical numeric models to describe the dynamic behavior of viscoelastic rotors, evaluating and comparing their performances. From the Anelastic Displacement Fields (ADF) approach, introduced into the Lagrange equations by a differential operator in time domain, the equations of motion are getting by Rayleigh-Ritz approximation. Comparative analyses are performed for two different types of PVC and aluminum rotors, based on the results of the numerical resolution and theoretical references. The first model results in a good approximation for the aluminum, while the latter does for the PVC.
Keywords
viscoelasticity, SDI, Hysteretic., ADF, rotor
