Experimental validation of a model for a self-adaptive beam–slider system

A system consisting of a doubly clamped beam with an attached body (slider) free to move along the has been studied recently by multiple research groups. Under harmonic base excitation, capacity passively adapt itself (by slowly changing slider position) yield either high or low vibrations. The central contributions this work are refinement developed model regard finite stiffness beam’s clamping, followed thorough validation against experimental results. With intent achieve repeatable and robust self-adaption, new prototype was designed, featuring, in particular, continuously adjustable gap size concave inner contact geometry. initial is updated based on results Experimental Nonlinear Modal Analysis (without slider). By varying excitation level frequency wide range, all known types behavior were reproduced experiment. simulation excellent agreement measurements, both qualitatively (type behavior) quantitatively. Minor deviations attributed system’s sensitivity inevitable uncertainties, particular friction coefficient linear natural frequency. It thus concluded that proposed well-suited for further analysis intriguing dynamics model-based optimization technical applications such as energy harvesting.