Modélisation de l'amortissement actif-passif des structures sandwichs

Abstract : Since the last decade, active and passive control of noise and vibration became a main issue in industrial application. Concerning passive solutions, sandwich panels and beams with viscoelastic core layer are used in many applications for vibration and noise control thanks to their superior capability in energy absorption. In active control, piezoelectric layers and patch are most widely used due to their effectiveness. Coupling both control types, in the so named ?hybrid control?, results in multi-modal vibration control. Using sandwich panels, this coupling leads to some identified problems. The first one is that the global stiffness matrix is complex, frequency and control dependant, leading to a non linear eigenvalue problem. The second problem is that the model should take into account the viscoelastic shear effect. In this work, analytical and numerical models and methods are developed for determining the modal properties, frequency and hybrid damping introduced by viscoelastic and piezoelectric sandwich structure
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Hakim Boudaoud. Modélisation de l'amortissement actif-passif des structures sandwichs. Autre. Université Paul Verlaine - Metz, 2007. Français. ⟨NNT : 2007METZ035S⟩. ⟨tel-01748995⟩

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