PREDICTION AND MEASUREMENT OF THE VIBRATION AND ACOUSTIC RADIATION OF PANELS SUBJECTED TO ACOUSTIC LOADING

摘要

Baseline experimental measurements of the response and acoustic radiation of an aluminum panel due to normally incident random acoustic excitation have been acquired. Computational predictions of the responses were made using a measured spectrum of the incident pressure as input. The prediction method is based upon a finite element model of the panel and Rayleigh's integral for the radiated acoustic field. Comparisons of the predicted and measured power spectral densities of the panel normal velocity and transmitted acoustic pressure show very good agreement, thus validating the prediction method. Minor discrepancies appear primarily attributable to uncertainties about the spatial characteristics of the incident pressure and acoustic reflections in the receiving room.