Structural multi-modal damping by optimizing shunted piezoelectric transducers

Stéphanie Livet (1) , Manuel Collet (2) , Marc Berthillier (2) , Pierrick Jean (1) , Jean Cote (2)

1 Snecma-SAFRAN group
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

The capacity of different auto-supplied devices using shunted piezoelectric circuits are studied here to improve structural damping by avoiding implementation of complex and heavy control devices. The presented technique uses a dedicated numerical piezo-mechanical model combining both mechanical and electrical coupling parameters. An original methodology are also introduced for optimizing the parameters of electrical shunt circuits connected to piezoelectric elements and also structural locations of these integrated transducers. The results, experimentally validated (on beams and a plate), demonstrate that vibrations can be significantly reduced when shunted piezoelectric devices are mounted on a real structure. Finally, the proposed methodology is used for optimizing shape and location of the shunted piezoelectric patches to damp several modes of a plate.

Domaines: Mécanique [physics]

Stéphanie Livet, Manuel Collet, Marc Berthillier, Pierrick Jean, Jean Cote. Structural multi-modal damping by optimizing shunted piezoelectric transducers. Revue Européenne de Mécanique Numérique/European Journal of Computational Mechanics, 2011, 20 (1-4), pp.73-102. ⟨10.3166/ejcm.20.73-102⟩. ⟨hal-02300138⟩