BEM-FEM Acoustic-Structure Interaction For Modeling and Analysis of Spacecraft Structures Subject to Acoustic Excitation

Spacecraft structures are subject to acoustic load and high frequency vibration, particularly during launch, which can impose severe and adverse affect ot the structures of the spacecraft and their payloads. For many classes of structures exhibiting a plate-like vibration behavior, such as antennas and solar panels, their low-order mode response is likely to be of greatest importance. Based on these considerations, the present work is focused on modeling and analysis of spacecraft structure subject to acoustic excitation, and for this purpose, the acoustic-structure interaction problem is modeled and analyzed using boundary and finite element coupling. The analysis has been developed using three parts of approach: the calculation of the acoustic radiation from the vibrating structure, the finite element formulation of structural dynamic problem, and the calculation of the acoustic-structural coupling using coupled BEM/FEM techniques. The development of the computational scheme for the calculation of the structural dynamic response of the structure using coupled BEM/FEM will be elaborated. Some generic examples typical for spacecraft structure are elaborated.