Dynamic characteristics of a beam system with active piezoelectric fiber reinforced composite layers

摘要

In this paper, a one-dimensional piezoelectric mass-dashpot-spring parallel model is presented to evaluate the effective Young's modulus, coefficient of shear viscosity for active piezoelectric fiber reinforced viscoelastic composite materials based on the well-known iso-field assumptions. An illustrative analysis is carried out to investigate the dynamic characteristics of a beam system with active piezoelectric fiber reinforced viscoelastic composite damping layers. Numerical results are presented to show the effects of major parameters of composite damping layers and electrode pattern on the dynamic characteristics of the beam system. It is noted that the damping factor for the considered case of the beam system with the interdigitated electrode or circular-link interdigitated electrode can be higher than twice of that with the laminar electrode (LE). For the sake of suppressing the axial or transverse vibration of the beam system, the required electric field and settling time for the LE case are greater than that for the IDE or CLIDE case.