Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
STUDY OF AEROVISCOELASTIC SYSTEMS IN A PLATE MODELING USING DOUBLET LATTICE METHOD
Submission Author:
Bruno Sousa Carneiro da Cunha , MG
Co-Authors:
Antonio Marcos de Lima, Bruno Sousa Carneiro da Cunha, Tobias Morais, Denner Borges
Presenter: Bruno Sousa Carneiro da Cunha
doi://10.26678/ABCM.COBEM2019.COB2019-1648
Abstract
The aeronautical industry is always facing the flutter phenomena. The usefulness of flutter as a design metric leads the requirements for the optimization of aeroelastic performance. In order to achieve flutter suppression, the use of viscoelastic materials aims to control vibration amplitudes, in such a way to benefit the structural and aerodynamic performance. A plate wing model is used to investigate the influence of viscoelastic treatment in the aeroelastic response. The structural calculation is performed independently via the finite element method combined with Mindlin's theory, using the Fractional Derivative Model (FDM) for the viscoelastic layer. In addition, industry-standard tools are used to perform the unsteady aerodynamics calculations using the Doublet Lattice Method (DLM). A coupled scheme to assembly the aerodynamic and the structural viscoelastic effects are used in order to solve the aeroelastic model, via usual matching frequency methods. Finally, the influence of the viscoelastic treatment on the proposed structure will be evaluated as well the influence of environmental and operational parameters in the critical flutter velocity.
Keywords
flutter suppression, passive flutter control, aeroviscoelastic, doublet lattice method
