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

摘要

Satellites and payloads launched with large vehicleswith rocket boosters like ARIANE-5 are subjected tosignificant noise levels during lift-off which may becritical in terms of stress/acceleration level for sensitivecomponents 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 beapplied in the early stage of the design of Herschel andPlanck satellites to provide an early assessment of theacceleration responses of satellite substructures.A special focus is given on the proposed methodology,its benefits and obtained results in terms of responsepredictions, as well as on the progress still expected bythe Space industry in terms of computational efficiencyvs. frequency range of interest.