Can I read Extreme parametric resonance oscillations of a cantilever: An exact theory and experimental validation on EtoBox?

Extreme parametric resonance oscillations of a cantilever: An exact theory and experimental validation by Hamed Farokhi; Eetu Kohtanen; Alper Erturk is a Engineering article available to read on EtoBox.

What is Extreme parametric resonance oscillations of a cantilever: An exact theory and experimental validation about?

Flexible cantilevered beams are capable of undergoing motions of extremely large amplitudes which are relevant to both conventional and emerging applications. However, modelling and capturing such behaviour is not a straightforward task and requires the application of a geometrically exact model. In this study, the extreme parametric resonance responses of a cantilever with a tip mass are captured through carefully conducted experimental measurements and compared to the predictions of a centreline-rotation-based geometrically exact cantilever beam model. For the experimental part, a state-of-the-art in-vacuo base excitation set-up consisting of a vacuum chamber and a long-stroke shaker is utilised to excite the cantilever in the axial direction near parametric resonance and drive the cantilever to very large oscillation amplitudes. This set-up is accompanied by a high-speed camera to capture footage of the deformed configurations of the cantilever in a period of steady-state oscillations at each excitation frequency. The cantilever motion amplitudes are then extracted from the videos through use of a robust image processing code. For the theoretical modelling and numerical analysis

Who reads Extreme parametric resonance oscillations of a cantilever: An exact theory and experimental validation?

Author

Hamed Farokhi; Eetu Kohtanen; Alper Erturk

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)