Abstract
This paper discusses the air-borne and structure-borne insertion losses of acoustic materials attached to sandwich-composite panels. The main structure is modeled using an analytical model using discrete layer theory. In this model, all layers of the panel are assumed orthotropic, and both symmetric and anti symmetric modes of propagation are accounted for. For both air-borne and structure-borne excitations, the transfer matrix method with finite size effect correction is used to account for the effect of the noise control treatment. Moreover, power balance is used to highlight the effect of the acoustic treatments in terms of added damping. A three dimensional finite element modeling based on the mixed (u,p) formulations for poroelastic materials and a sandwich element for the structure is presented and used to validate the model. Several examples including sandwich composite panels and various noise control treatments (foams versus fibers, effect of a resistive screens, etc.) are presented and compared.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
