We present in this work a new semi-passive nonlinear absorber that aims to attenuate the vibrations of an elastic structure under external excitation. The design of the absorber consists of connecting a nonlinear shunt circuit to the host structure via a piezoelectric patch. The shunt circuit is composed of an R-L circuit connected in series with a quadratic nonlinear voltage source, intentionally added to the circuit. The main feature of this absorber is the replacement of the mechanical resonance by an antiresonance with an amplitude independent of the excitation level, and thus, a saturation phenomenon. This feature is a consequence of the two-to-one internal resonance generated by a specific tuning of the electrical resonance frequency. We show in this work the theoretical modeling of the absorber and experimental analysis on a cantilever beam structure in which the saturation phenomenon is detected, leading to a high attenuation level.
This work concerns the modeling and analysis of nonlinear vibrations of thin structures with piezoelectric transduction. This type of structures is used in numerous applications and in particular for the design of micro-electro-mechanical systems (MEMS). This study proposes a numerical strategy to compute efficiently the dynamics of electromechanical problems with geometric non-linearities, i.e. by taking into account both piezoelectric coupling and large structural displacements. The methodology is based on the computation of independent Reduced-Order Models (ROM) obtained from full-order finite element solutions by using a modal projection technique and a non-intrusive STEP (STiffness Evaluation Procedure) approach.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.