Nonlinear Dynamics of Axially Loaded Piezoelectric Energy Harvester

In the present work nonlinear dynamics of axially loaded energy harvester which is modeled as a fixed-guided beam with tip mass having piezoelectric patch has been investigated. The system is subjected to a base excitation and periodic axial load. The governing equation of motion of the system is developed using Lagrange principle. A closed form solution has been developed to find out the response and generated voltage using method of multiple scales (MMS). Frequency response of the system is obtained for superharmonic and subharmonic resonance conditions and parametric study has been carried out in order to investigate the variation of output voltage with different system parameters.