Parametric Study of a Revolving Piezoelectric Tapered-Bimorph Beam Subjected to Pulsating Axial Load Considering Various Boundary Conditions

Abstract

Designing any rotational vibration energy harvester requires a comprehensive study of rotating sandwiched structures with piezoelectric layers and under external loading. In this article, the parametric investigation of a rotating piezoelectric bidirectional-tapering-bimorph beam comprises both width and thickness tapering central host and piezoelectric patches on its surfaces, under axial pulsating load is done. The mathematical modeling of the system is done using Hamilton’s equation. The effect of four boundary arrangements and different piezoelectric patch thicknesses, taper parameters, and rotational frequencies on the system’s response is studied with the help of parametric instability regions and static load graphs using the MATLAB program. The results demonstrate that an increase in the thickness taper parameter increases resonant frequencies of the structure significantly compared to the marginal rise with the width counterpart. The resonant frequencies decreased with an increase in the piezoelectric patch thickness up to a particular value; after that, the frequencies are increased. The pinned–pinned system provides the lowest first resonant frequency for any set of operating and system parameters; however, practical implementation of this system in the energy harvesting devices will be complicated. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.