Upper Bound of Vibration Response of Satellite Panel Under Diffused Acoustic Field Excitation

Abstract

Severe random vibration is easily induced to satellite structure during the flight. Acoustic test at ground is applied to verify the structural design and abnormal function of equipment. An accurate prediction of acoustic induced vibration response of equipment, therefore, is critical for design purposes. Especially for a satellite exterior panel, it has been shown that two subsystem statistical energy analysis model composed of an acoustic chamber and a single panel will simplify the analyses approach and gives a satisfactory result. This paper derives two subsystem SEA model for the prediction of the exterior satellite panel and formulates the damping loss factor equation based on the experiment data. Moreover, the upper bound value of the two subsystem SEA model is presented for further simplification with which response is obtained without structural damping loss factor and radiation coupling loss factor. These two models were validated well by acoustic tests of eleven satellite honeycomb panels.