An analytical model for bandlimited response of vibroacoustic systems

Abstract

In this paper, an analytical method for predicting bandlimited time-averaged energies in vibroacoustic systems is presented. A vibroacoustic system is considered where a flexible boundary structure is directly excited by some external forces and an enclosed sound field is driven through an acoustic-structural coupling. This method allows for the reduction in computational effort compared to the classical modal coupling method especially for analysis in the medium frequency range where there is a large number of dominant acoustic and/or structural modes. The vibroacoustic problem is also extended to consider cases of structure-borne sound where the sound field is subject to coupling with various vibrating boundary structures. The prediction accuracy of the present method will be compared to the classical modal coupling method and its computational efficiency is demonstrated by means of numerical examples.