In many fields of engineering combinations of several materials has to be used to achieve the required behavior. In particular, the sound insulation of a structure is normally obtained by attaching some porous layers to the solid structure which carries the load. Examples are walls of buildings, the engine hood in a car, or the side wall of an aircraft. The latter will serve in this project as model problem because it essentially covers all aspects of such a construction.
The aim is to simulate the acoustic behavior of a layered plate like structure. Different to a composite plate, here, clearly identifiable layers are considered where the connection between them vary from tight to loose or it is simply an air gap. Hence, not only the plate itself also the coupling has to be considered. Whereas the porous structure requires the development of a poroelastic plate theory the other
structural elements can be modeled with known techniques. But, the coupling between the single layers has to be rigorously
analyzed. Finally, the numerical simulation tool will be validated by experiments in cooperation with Prof. O. v. Estorff, Hamburg
University of Technology (TU HH).
Numerical simulation of the dynamic behaviour of poroelastic plates due to acoustical excitation