VIBROACOUSTIC STUDY OF SCIENTIFIC SATELLITES RELYING ON A TIME DOMAIN FEM/BEM METHOD

摘要

Satellites and payloads launched with large vehicles with rocket boosters like ARIANE-5 are subjected to significant noise levels during lift-off which may be critical in terms of stress/acceleration level for sensitive components or lightweight panels. This paper highlights how a time domain FEM/BEM (Finite Element Model/Boundary Element Model) approach for modeling the vibroacoustic loads may be applied in the early stage of the design of Herschel and Planck satellites to provide an early assessment of the acceleration responses of satellite substructures. A special focus is given on the proposed methodology, its benefits and obtained results in terms of response predictions, as well as on the progress still expected by the Space industry in terms of computational efficiency vs. frequency range of interest.