Modeling of Shunted Piezoelectrics and Enhancement of Vibration Suppression through an Auxetic Interface

Abstract

In this study, a new technique is presented for enhancing the vibration suppression of shunted piezoelectrics by using an auxetic composite layer. Finite element models have been created to simulate the dynamic behavior of the piezoelectric composite beam. In particular, 2D FE and 3D FE models have been created by simulating the shunt as a passive controller and their results are compared. Furthermore, a parametric analysis is presented of the circuit elements, i.e., the resistors, inductors, and capacitors and of the auxetic material, i.e., the thickness. It was found that the proposed modification by adding an auxetic layer of a considerable thickness enhances the electromechanical coupling and indirectly influences the vibration control of the whole structure. However, the use of 3D modeling is necessary to study this auxetic enhancement.

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

“…The discussion of the results follows, and the findings of this research are highlighted at the end. The present paper is an extension of a concept that has been presented by the authors in the conference paper [40].…”

“…The frequencies for the first four bending modes of the beam are given in Table 2 and are derived using the Multiphysics 3-D finite element model [40]. Furthermore, the finite element model of the structure is depicted in Figure 5a.…”

“…The present paper is an extension of a concept that has been presented by the authors in the conference paper [40].…”

Auxetic Enhancement of the Shunted Piezoelectric Effect for Vibration Suppression

“…The approach of utilizing an auxetic to change a tensile-compressive input at the top of a bending beam into a tensile-tensile signal at the piezoelectric patch may be more widely applicable. The different stress distribution, [7], is due to the ability of the auxetic layer to transform a tension-compression signal from the surface of the host beam to a tension-tension one on the surface of the piezoelectric patch. It must be noted that the usage of 3D modeling is necessary for the study of this effect, which is invisible in 2D models.…”

“…It must be noted that the usage of 3D modeling is necessary for the study of this effect, which is invisible in 2D models. For more information, the reader is referred to the paper [7].…”