Vibro-Acoustic Energy Transmission Analysis of the Acoustic Cavity with Multiple Partial Partitions

The general dynamic characteristics of the acoustic cavity with multiple partial partitions are presented in this thesis. A theoretical model has been developed for predictions, and several configurations analyzed. To describe apertures on interface subcavities, virtual air panel assumption is introduced into improved Fourier series system. governing equations coupling system derived by using energy principle. results obtained proposed firstly compared numerical calculations based finite element method (FEM). Subsequently, a configuration made up from rigid partitioned steel specifically built, forced responses have measured comparison validation. present excellent over most studied frequency range. Furthermore, visualizations interior sound intensity field three under different frequencies researched to illustrate transmission paths vibro-acoustic mechanism complicated believed be helpful optimal design insulation capacity.