Renseignements pratiques
TÉLÉCHARGEZ L'OFFRE
- Master_CeLyA_LTDS_LVA_2020.pdf (PDF, 463 Ko)
Informations sur l'organisme
Keywords
complex structures, composites, laminated panels, multilayers, interface conditions, damping, non-linearity, analytical modeling, equivalent/condensed modeling.
Context
Generally, poroelastic materials are inserted along the path of noise propagation to mitigate and dissipate the propagation of sound waves. More and more sophisticated material architectures are developed integrating solid inclusions, anisotropic materials, heterogeneous materials, damping systems, stiffeners... However, for this type of nonhomogeneous solutions, conventional modeling and characterization tools are generally difficult to implement and finite element solutions are often used. These solutions are very expensive in terms of resources and computation time and unknowns remain as the boundary conditions and interface conditions to be considered between the different layers. Reduced and condensed models, mainly analytical, are thus necessary to better understand and optimize the vibratory and damping behaviour of these structures.
Industrial Partner
Matelys Research Lab
François Xavier Bécot, Fabien Chevillotte, Fabien Marchetti https://www.matelys.com/fr/index.html
Tel : +33 (0)9 72 50 93 16 francois-xavier.becot@matelys.com
References
[1] Zhou, C.W., Sun, X.K., Lainé, J.P., Ichchou, M.N., Zine, A., Hans, S., Boutin, C., Wave Propagation Feature in Two-Dimensional Periodic Beam Lattices with Local Resonance by Numerical Method and Analytical Homogenization Approach International Journal of Applied Mechanics, 10 (4), art. no. 1850042 (2018).[2] Gourdon, E., Seppi, M., On the use of porous inclusions to improve the acoustical response of porous materials: Analytical model and experimental verification Applied Acoustics, 71 (4), pp. 283-298 (2010).
[3] Ege, K., Roozen, N.B., Leclère, Q., Rinaldi, R.G., Assessment of the apparent bending stiffness and damping of multilayer plates; modelling and experiment Journal of Sound and Vibration, 426, pp. 129- 149 (2018).
[4] Marchetti, F., Ege, K., Roozen, N.B., Leclère, Q. On the structural dynamics of laminated composite plates and sandwich structures ; a new perspective on damping identification, Submitted to Journal of Sound and Vibration, 2019.