04.2 - Structural Analysis and Design, Structural Dynamics, Aeroelasticity
STRUCTURAL DAMPING EFFECTS ON THE ACOUSTIC SCATTERING BY ELASTIC PLATES
M.M. Nilton¹, A.V.G. Cavalieri¹, M.V. Donadon¹, W.R. Wolf, Universidade Estadual de Campinas, Brazil; ¹Instituto Tecnológico de Aeronáutica, Brazil
This work deals with trailing edge noise, with turbulence scattered by a poroelastic plate. We use a boundary element method that couples the acoustic problem with the fluid-structure interaction, taking into account structural damping of viscoelastic materials. Critical damping coefficients, optimal for noise reduction, are obtained. Their relevance for aeronautical applications is discussed.