Stationary Large Amplitude Dynamics of the Finite Chain of Harmonically Coupled Pendulums

We present an analytical description of the large-amplitude stationary oscillations of the finite discrete system of harmonically-coupled pendulums without any restrictions to their amplitudes (excluding a vicinity of \(\pi\)). Although this model has numerous applications in different fields of phy...

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Hauptverfasser: Smirnov, Valeri V, Manevitch, Leonid I
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description We present an analytical description of the large-amplitude stationary oscillations of the finite discrete system of harmonically-coupled pendulums without any restrictions to their amplitudes (excluding a vicinity of \(\pi\)). Although this model has numerous applications in different fields of physics it was studied earlier in the infinite limit only. The developed approach allows to find the dispersion relations for arbitrary amplitudes of the nonlinear normal modes. We underline that the long-wavelength approximation, which is described by well- known sine-Gordon equation leads to inadequate zone structure for the amplitude order of \(\pi/2\) even if the chain is long enough. The extremely complex zone structure at the large amplitudes corresponds to lot of resonances between nonlinear normal modes even with strongly different wave numbers. Due to complexity of the dispersion relations the more short wavelength modes can possess the smaller frequencies. The numerical simulation of the dynamics of the finite-length chain is in a good agreement with obtained analytical predictions.
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subjects Amplitudes
Chains
Complexity
Computer simulation
Mathematical models
Pendulums
title Stationary Large Amplitude Dynamics of the Finite Chain of Harmonically Coupled Pendulums
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