Low frequency and large amplitude oscillations of cantilevers in viscous fluids

Aureli, Matteo; Porfiri, Maurizio
April 2010
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p164102
Academic Journal
We study nonlinear vibrations of cantilever beams oscillating in viscous fluids. A handleable expression for the inertial and damping loads due to the encompassing fluid is proposed. We expand on the canonical viscous diffusion theory by incorporating vortex shedding effects at large oscillation amplitudes. Comparison with experimental results on underwater low frequency and large amplitude oscillations of cantilevers is reported. The approach is applicable to the analysis of ionic polymer metal composites vibrating underwater.


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