Numerical simulation of active control of structural vibration and acoustic radiation of a fluid-loaded laminated plate

Abstract

Active control of structural vibration and acoustic radiation of a fluid-loaded laminated plate is numerically studied. A finite element formulation is developed for modelling the dynamic behavior of the laminated plate integrated with piezoelectric layers and viscoelastic layer based on the first order shear deformation theory (FSDT). The Rayleigh integral on the plate surface is coupled with the derived finite element formulation to model acoustic fluid–structure interaction of the baffled laminated plate subjected to heavy fluid loading. Active damping control and active constrained layer damping (ACLD) control of structural vibration and acoustic radiation of the baffled fluid-loaded laminated plate with piezoelectric layers acting as active damping layers and viscoelastic layer acting as passive damping layer are formulated using the developed numerical method and negative velocity feedback control algorithm. The control performance of the active damping control and the ACLD control of structural vibration and acoustic radiation of a fluid-loaded plate is numerically evaluated. The results obtained demonstrate that the ACLD is more effective. The proposed model can be used for designing and predicting the control of structural vibration and acoustic radiation of a fluid-loaded laminated plate using active damping control and the ACLD treatment.