Determination of the Effects of Mass and Stiffness on the Vibration Response of Ribbed Panels Subjected to Random Acoustic Noise.

摘要

The purpose of the report is to experimentally determine the effects of localized mass and stiffness parameters on the vibration response of stiffened panel structures excited by acoustic noise. Eleven panels were constructed,similar in weight and configuration with typical aircraft panel structures. A baseline panel was used to determine reference mass and stiffness properties;five panels were varied in mass with stiffness kept constant,and five panels with constant mass were in stiffness. The panels were excited in an acoustic reverberation test facility using a broad-band siren and horn assembly. Excitation and response measurements were taken using microphone and accelerometer transducers attached to the panels. The data were then reduced and correlated to construct vibration prediction curves as a function of excitation/response levels,frequency,and mass and stiffness parameters. (Modified author abstract)