Oscillations Caused by Solid Friction : Part 4,Experimental Study

概要

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Oscillations caused by solid friction are treated experimentally in a rotational system. A ring-like body is connected to a spring and can oscillate coaxially with a rotating shaft under the application of spring force and nonlinear friction force between sliding contact surfaces. Pre-driving of the rotating shaft just after the cleaning of sliding surfaces has a great influence on the characteristic curve betwen kinetic friction moment and peripheral velocity of the shaft. Pre-driving produces a change in configuration of the characteristic curve, therefore the corresponding amplitude-velocity curve and the period-velocity curve obtained experimentally show different appearances from those without pre-driving. These curves are qualitatively similar closely to theoretical ones derived from Lienard's construction.
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