764 - Normal incidence transmission loss of symmetric sandwich structures in a plane wave tube
Bonfiglio P., Pompoli F., Peplow A.
Abstract
The Transmission Loss of different kind of small symmetric (outer laminates same thickness) sandwich structures is investigated by means of a four microphone technique in a plane wave tube. By using the decomposition technique, incident, reflected and transmitted contributions are separated and transmission coefficient is easily calculated. Furthermore the Transmission Loss of above-mentioned samples is simulated by means of a Finite Element model. In order to obtain values, to be used in the model, for the mechanical parameters of the sandwich structures components (i.e. Young modulus of the laminates and Shear modulus of the core), measurements on symmetric beams with both ends free were carried out and an inverse six order PDE model was used.
Citation
Bonfiglio P.; Pompoli F.; Peplow A.: Normal incidence transmission loss of symmetric sandwich structures in a plane wave tube, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
|
