Reduced order model for noise and vibration attenuation of water immersed viscoelastic sandwich structures

Lucie Rouleau , Jean-François Deü , Antoine Legay , Jean-Francois Sigrist (1) , Pierre Marin-Curtoud

1 Service Technique et Scientifique

The structural optimisation of structures with constrained viscoelastic layers is a major issue in the conception of submarines, to assure stealthiness performances. This work proposes reduction methods to solve the system composed of a sandwich structure with a viscoelastic core coupled to fluids in the frequency domain. The first one consists in developping added mass operators to take into account the fluid. The second one is the combination of modal projection and iterative methods to evaluate the reduced problem and estimate the dissipative energy in view of optimization. This numerical strategy is applied to the response of a bidimensional sandwich ring coupled to internal and external fluids and extended to a tridimensional structure.

Domaines: Acoustique [physics.class-ph]

Lucie Rouleau, Jean-François Deü, Antoine Legay, Jean-Francois Sigrist, Pierre Marin-Curtoud. Reduced order model for noise and vibration attenuation of water immersed viscoelastic sandwich structures. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810773⟩