Model of the vibro-acoustic behaviour of a double panel partition

The double panel partitions are often used in noise control engineering because of their high attenuation capacity of noise and their low weight. To investigate the physical phenomena governing the vibro-acoustic behaviour, some authors have considered simply supported panels and relatively huge fluid cavities. Moreover, no parametric study has been carried out in the literature. In this study, we propose to investigate a double panel partition in which the two panels are not simply supported but maintained to each other and to a fixed support by three rubber bands at the boundaries. We developed a numerical model taking into account possible motion of the panels boundaries and the fluid-structure interaction. We studied later the influence of some parameters such as the rubber stiffness the mass stiffness ratio of the panels and the fluid cavity on the global behaviour of the system and in particular on the mass-air-mass mode. A comparison with an experimental study has taken place in this work.