Nonlinear piezoelectric shunting for structural damping

David J. Warkentin; Nesbitt W. Hagood

doi:10.1117/12.275699

6 June 1997 Nonlinear piezoelectric shunting for structural damping

David J. Warkentin, Nesbitt W. Hagood

Proceedings Volume 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems; (1997) https://doi.org/10.1117/12.275699
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

The electromechanical coupling behavior of piezoelectric materials allows their use as damping elements in dynamic structural systems. By shunting the electrical terminals of piezoelectric element bonded to a structure, electrical components can be used to change the apparent dynamic response of the structure. Linear shunting components such as resistive elements or inductive-resistive-capacitive circuits, respectively, have been used to produce behavior analogous to that use of viscoelastic damping materials and tuned proof- mass dampers. This paper examines the possible use of nonlinear shunting circuits with the aim of attaining higher effective damping levels and reduced sensitivity to frequency tuning as compared with conventional linear shunts. The shunting components may be realized in such a way as to allow the vibrational energy removed from the structure to be recovered in a usable form. The shunting circuits examined in this work are a rectified dc voltage source and a time-varying resistor. A one-dimensional electromechanical circuit model is used to evaluate the performance of the shunts in terms of effective material loss factor, and the dependence of this loss factor on the electromechanical coupling coefficient and the disturbance amplitude is considered. The behavior of the rectified dc voltage source shunting scheme applied to a simple resonant structure is examined to determine the achievable damping levels, amplitude dependence, and potential undesirable motions induced at higher harmonics of resonance or disturbance frequencies by the electrical nonlinearities.

Citation Download Citation

David J. Warkentin and Nesbitt W. Hagood "Nonlinear piezoelectric shunting for structural damping", Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); https://doi.org/10.1117/12.275699

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available