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Vibration control using piezoelectric shunt damping systems : recent developments in modeling and applications

le 17 mai 2018
à 13h30

Jean-François Deü, Professeur au Conservatoire National des Arts et Métieurs, interviendra lors d'un séminaire.

Piezoelectric materials are proposed for many applications, especially in the field of dynamics where their properties of coupling mechanical stress and strain with an electric circuit are used to detect, measure, or control the vibrations. Some of active research fields that use piezoelectric materials are energy harvesting, passive and active vibration control, shape adaptation and structural health monitoring. Piezoelectric materials have also become widely used in micro/nano electromechanical systems as an alternative to the traditional electrostatic transduction technique. In this work, the specific application of passive reduction of structural vibration by means of shunted piezoelectric patches is addressed both theoretically and experimentally. Special attention is given on modeling aspects, optimization and applications on complex systems. 

The first part will be devoted to the modeling of coupled electromechanical systems including (i) the development of efficient finite element formulations, (ii) electromechanical coupling and (iii) reduced order models. Then, we will focus on performance of piezoelectric shunts. Various strategies to optimize, in terms of damping efficiency, the geometry of piezoelectric patches as well as their placement on the host structure, will be proposed. In particular, topology optimization algorithms will be adapted to vibration control problems. Various applications will be also presented in order to show the potential of piezoelectric shunt techniques: (i) vibration reduction of complex composite fan blades, (ii) nonlinear vibrations of piezoelectric multilayered structures, and (iii) vibro-acoustic control of structural-acoustic systems. Finally, some recent developments in multimodal vibration damping of structures coupled to their analogous piezoelectric networks will be presented.
Type :
Séminaires - conférences
Lieu(x) :
Campus de Cachan
Bâtiment Léonard de Vinci
Amphi E-media

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