A HYBRID WAVE BASED VIBRO-ACOUSTIC MODELLING TECHNIQUE FOR THE PREDICTION OF INTERIOR NOISE IN AN AIRCRAFT FUSELAGE

摘要

This paper presents a newly developed hybrid simulation technique for interior coupled vibro-acoustic analysis, which applies a wave based model for the acoustic cavity and a finite element model for the structure. The resulting hybrid model benefits from the computational efficiency of the wave based method, while retaining the finite element method's ability to model the structural part of the problem in great detail. Application of this approach to the study of the interior noise inside a section of an aircraft shows an improved computational efficiency over classical finite element procedures and illustrates the potential of the hybrid method as a powerful tool for the analysis of coupled vibro-acoustic systems.