Journal
PHYSICS LETTERS A
Volume 375, Issue 25, Pages 2524-2530Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2011.05.021
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The author considers the planar rotational motion of the mathematical pendulum with its pivot oscillating both vertically and horizontally, so the trajectory of the pivot is an ellipse close to a circle. The analysis is based on the exact rotational solutions in the case of circular pivot trajectory and zero gravity. The conditions for existence and stability of such solutions are derived. Assuming that the amplitudes of excitations are not small while the pivot trajectory has small ellipticity the approximate solutions are found both for high and small linear dampings. Comparison between approximate and numerical solutions is made for different values of the damping parameter. (C) 2011 Elsevier B.V. All rights reserved.
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