Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A Stochastic Modeling of Aeroviscoelastic Systems Subjected to Uncertainties for Subsonic Stability Analysis.
Submission Author:
Prince Azsembergh Nogueira de Carvalho , RN
Co-Authors:
Prince Azsembergh Nogueira de Carvalho, Gutembergy Diniz, Marcelo Araújo Delgado Filho, Bruno Sousa Carneiro da Cunha, Antonio Marcos de Lima
Presenter: Bruno Sousa Carneiro da Cunha
doi://10.26678/ABCM.COBEM2023.COB2023-0305
Abstract
To reduce the environmental impact in the world, governments and international organizations have proposed several strategies to produce more efficient products and solutions. The aeronautical and aerospace industries have proposed to reduce their CO2 emissions to 0 by 2050. To achieve this goal, manufacturers are using solutions such as new blade engines, Sustainable Aviation Fuel (SAF), lighter materials, and new geometric wing shapes that are more efficients. However, to avoid the instability effects due to the structural and aerodynamic modifications of the resulting aeroelastic systems, such as the flutter phenomenon, one strategy may be the use of vibration control techniques. In this context, passive control using viscoelastic material is an interesting strategy to be used in such situations due to its low cost and application facilities. Moreover, due to the inherent variabilities of the structural and aerodynamic parameters appearing in these systems, it is also necessary to propose an efficient stochastic modeling methodology of them for dealing with more realistic applications of industrial interest. Thus, this work aims to model a stochastic aeroviscoelastic system of a plate-like wing in a subsonic regime to increase the stability of this type of structure by combining the stochastic finite element modeling and the Doublet Lattice Method (DLM). It will also quantify the effect of increasing mass and stiffness purely related to the addition of layers, and then the system including the damping of the viscoelastic material. It is shown the envelopes of solutions in terms of the flutter speed boundary and the degree of influence of structural and aerodynamic parameters on the critical flutter speeds of a panel system treated with a passive constraining layer.The results have shown an increase of 31 % flutter speed with a 38 % increase in mass. Although the ratio (speed gain/mass gain) is below one in this case, with partial treatment it can even reach 2, proving that it can be advantageous to treat aeronautical panels with layers of viscoelastic material.
Keywords
Viscoelastic material, Stochastic Finite Element Method, Vibration control, Aeroelasticity
