- Peretti, L.F. and Dowell, E.H., Asymptotic modal analysis of a rectangular acoustic cavity excited by wall vibration,
AIAA J. (USA), vol. 30 no. 5
pp. 1191 - 8 .
(last updated on 2007/04/10)
Asymptotic medal analysis, a method that has recently been developed for structural dynamical systems, has been applied to a rectangular acoustic cavity. The cavity had a flexible vibrating portion on one wall, and the other five walls were rigid. Banded white noise was transmitted through the flexible portion (plate) only. Both the location along the wall and the size of the plate were varied. The mean square pressure levels of the cavity interior were computed as a ratio of the result obtained from classical modal analysis to that obtained from asymptotic modal analysis for the various plate configurations. In general, this ratio converged to 1.0 as the number of responding modes increased. Intensification effects were found due to both the excitation location and the response location. The asymptotic modal analysis method was both efficient and accurate in solving the given problem