Vibration damping in sandwich panels

摘要: Currently, there is incomplete knowledge of the damping level and its sources in satellite structures a suitable method to model it constitutes necessary step for reliable dynamic predictions. As first characterization, honeycomb structural panels, which identified as main contributor global damping, has been considered by ALCATEL SPACE. In this work, inherent vibration mechanism sandwich including those with both aluminium carbon fibre-reinforced plastic (CFRP) skins, considered. It shown how theoretical modal properties panel can be predicted from stiffness constituent components using basic laminate theory, first-order shear deformation theory simple discretization method. Next, finite-element transcription approach presented. what extent implemented software package predict overall value each specific mode. Few many models used natural frequencies plates are supported experimental data even fewer values. Therefore, second, part, Rayleigh–Ritz NASTRAN (finite-element SPACE) characteristics (frequency damping) compared experimentally obtained values two specimens typical core panels (aluminium CFRP skins) SPACE panels. through these results that (theoretical finite element) satisfactory promising.