Donald B. Bliss
Dept. of Mech. Eng. and Mater. Sci., School of Eng., Duke Univ., Durham, NC 27706
A new homogenization approach to periodic panel/frame acoustics permits faster analysis and design of panel/frame structures. The approach involves incorporating periodic local transfer functions in a homogenized global problem. The transfer functions model the local-global interactions at various orders. The present work develops the idea of these transfer functions and the idea of tailoring these functions for noise control. The transfer functions are computed for idealized spring-mass-damper panel subsystems and for real flexible panel subsystems. Results are shown with problems incorporating different orders of transfer functions, and the frequency of applicability is shown to increase with higher-order corrections. Results are also shown where noise reduction is obtained across panel/frame structures incorporating tailored transfer functions.