title: Assessment of a hybrid finite element-transfer matrix model for flat structures with homogeneous acoustic treatments.
abstract: Modeling complex vibroacoustic systems including poroelastic materials using finite element based methods can be unfeasible for practical applications. For this reason, analytical approaches such as the transfer matrix method are often preferred to obtain a quick estimation of the vibroacoustic parameters. However, the strong assumptions inherent within the transfer matrix method lead to a lack of accuracy in the description of the geometry of the system. As a result, the transfer matrix method is inherently limited to the high frequency range. Nowadays, hybrid substructuring procedures have become quite popular. Indeed, different modeling techniques are typically sought to describe complex vibroacoustic systems over the widest possible frequency range. As a result, the flexibility and accuracy of the finite element method and the efficiency of the transfer matrix method could be coupled in a hybrid technique to obtain a reduction of the computational burden. In this work, a hybrid methodology is proposed. The performances of the method in predicting the vibroacoutic indicators of flat structures with attached homogeneous acoustic treatments are assessed. The results prove that, under certain conditions, the hybrid model allows for a reduction of the computational effort while preserving enough accuracy with respect to the full finite element solution.
authors.affiliation: Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada.
authors.forename: Luca
authors.initials: L
authors.lastname: Alimonti
authors.affiliation: Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada.
authors.forename: Noureddine
authors.initials: N
authors.lastname: Atalla
authors.affiliation: Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada.
authors.forename: Alain
authors.initials: A
authors.lastname: Berry
authors.affiliation: Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST), Montreal, Quebec H3A 3C2, Canada.
authors.forename: Franck
authors.initials: F
authors.lastname: Sgard