Vibration control of a rotating hub-plate with enhanced active constrained layer damping treatment

Abstract

A rigid-flexible coupled dynamic model for a rotating hub-plate with enhanced active constrained layer damping (EACLD) treatment is established. To improve the transmissibility of the active control of the piezoelectric (PZT) layer, the edge elements are attached to the rim of the traditional active constrained layer damping (ACLD) treatment in the present EACLD model. The coupling effect of transverse bending and in-plane stretching of the rotating EACLD plate is considered in the first-order approximate coupling (FOAC) dynamic equation. The sandwich layer in the EACLD structure is composed of edge elements and viscoelastic material (VEM), in which the edge elements are fabricated by epoxy glue and modeled as two slender body with mass and stiffness. After the modal validation under different cases, numerical simulation and vibration analysis including the influences of the rotation speed of the hub, the control gains, the equivalent shear modulus of the edge elements, the thickness ratio of the VEM layer and the base plate, the coverage area and the location of the EACLD patch are analyzed. Transient response results show that the vibration controllability of the rotating plate with EACLD treatment behaves preferably compared to the traditional ACLD configuration.