圧電型スマート制振板の電気‐機械連成特性

抄録

This study experimentally investigates the electromechanical properties of self-powered synchronized switch damping on inductor (SP-SSDI) technique, varying the applied acceleration level. As the acceleration level increases, the resonance frequencies of the open-circuited piezoelectric plate shifted to lower frequency and the distribution of the frequency response started to show asymmetry. For the SP-SSDI, as the acceleration level increases, the damping performance enhances. The reduced equation of motion of the piezoelectric plate, which is established based on the linear piezoelectric constitutive equation and is widely accepted, cannot predict these phenomena. We introduced equation of motion from the nonlinear piezoelectric constitutive equation, including the nonlinear stress and the product term of the electric field and the stress. Qualitatively, the resonance frequency shift, the asymmetric distribution, and the enhancement of the damping performance can be explained by using the equation of motion. We assume that the nonlinear stress and the product term of the electric field and the stress in the nonlinear piezoelectric constitutive equation is more likely to trigger these phenomena.