Active Vibration Control of Frame Structure by using Piezoelectric Actuation.

Abstract

Abstract Active vibration control involves applying force actively in a way that is opposite and equivalent to the forces that are present due to vibration. Often vibration causes large displacements to structures which lead to catastrophic failure. Therefore the research in the control of the large displacements of the structure due to vibration is an essential part of mechanics. In the present work a plane frame structure is modeled in ABAQUS CAE to perform linear finite element analysis (FEA). The mesh convergence study is performed to obtain the suitable meshing type and the approximate global size. The frame is vibrated by applying a sinusoidal cyclic load and the maximum displacements in addition to the response in terms of displacement-time are obtained. At the next step the lateral elements of the frame are bonded with piezoelectric strips and the piezoelectric strips are actuated by applying external voltage. The effect of simultaneous application of voltage on piezoelectric strip and the external sinusoidal dynamic force is deliberated in terms of the maximum displacement, deformed shape of the frame and the displacement-time response. The results obtained with and without the applications of piezoelectric actuation are carefully compared. The comparison shows a considerable reduction in maximum displacements as well as better stability of the structure.