Regular and chaotic motion of two bodies swinging on a rod

Lazare Osmanov () and Ramaz Khomeriki ()
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Lazare Osmanov: Free University of Tbilisi
Ramaz Khomeriki: Ivane Javakhishvili Tbilisi State University

The European Physical Journal B: Condensed Matter and Complex Systems, 2022, vol. 95, issue 11, 1-7

Abstract: Abstract We investigate regular and chaotic dynamics of two bodies swinging on a rod, which differs from all the other mechanical analogies: depending on initial conditions, its oscillation could end very quickly and the reason is not a drag force or energy loss. We use various tools to analyze motion, such as Poincaré section for quasi-periodic and chaotic cases. We calculate Lyapunov characteristic exponent by different methods including Finite Time Lyapunov Exponent analysis. Our calculations show that the maximal Lyapunov exponent is always positive except in the marginal cases when one observes quasi-periodic oscillations. Graphic abstract

Date: 2022
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DOI: 10.1140/epjb/s10051-022-00435-5

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