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Article overview
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Experimental validation of a model for a self-adaptive beam-slider system | | Florian Müller
; Maximilian Beck
; Malte Krack
; | | Date: |
1 Aug 2022 | | Abstract: | A system consisting of a doubly clamped beam with an attached body (slider)
free to move along the beam has been studied recently by multiple research
groups. Under harmonic base excitation, the system has the capacity to
passively adapt itself (by slowly changing the slider position) to yield either
high or low vibrations. The central contributions of this work are the
refinement of the recently developed system model with regard to the finite
stiffness of the beam’s clamping, followed by a thorough validation of this
model against experimental results. With the intent to achieve repeatable and
robust self-adaption, a new prototype of the system was designed, featuring, in
particular, a continuously adjustable gap size and a concave inner contact
geometry. The initial beam model is updated based on the results of an
Experimental Nonlinear Modal Analysis of the system (without slider). By
varying the excitation level and frequency in a wide range, all known types of
behavior were reproduced in the experiment. The simulation results of the
updated model with slider are in excellent agreement with the measurements,
both qualitatively (type of behavior) and quantitatively. Minor deviations are
attributed to the system’s sensitivity to inevitable uncertainties, in
particular with regard to the friction coefficient and the linear natural
frequency. It is thus concluded that the proposed model is well-suited for
further analysis of its intriguing dynamics and for model-based optimization
for technical applications such as energy harvesting. | | Source: | arXiv, 2208.00660 | | Services: | Forum | Review | PDF | Favorites | |
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