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research
Bifurcation structure of two Coupled Periodically driven double-well Duffing Oscillators
Authors
Anatole Kenfack
Publication date
1 January 2003
Publisher
'Elsevier BV'
Doi
Cite
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on
arXiv
Abstract
The bifurcation structure of coupled periodically driven double-well Duffing oscillators is investigated as a function of the strength of the driving force
f
f
f
and its frequency
Ω
\Omega
Ω
. We first examine the stability of the steady state in linear response, and classify the different types of bifurcation likely to occur in this model. We then explore the complex behaviour associated with these bifurcations numerically. Our results show many striking departures from the behaviour of coupled driven Duffing Oscillators with single well-potentials, as characterised by Kozlowski et al \cite{k1}. In addition to the well known routes to chaos already encountered in a one-dimensional Duffing oscillator, our model exhibits imbricated period-doubling of both types, symmetry-breaking, sudden chaos and a great abundance of Hopf bifurcations, many of which occur more than once for a given driving frequency. We explore the chaotic behaviour of our model using two indicators, namely Lyapunov exponents and the power spectrum. Poincar\'e cross-sections and phase portraits are also plotted to show the manifestation of coexisting periodic and chaotic attractors including the destruction of
T
2
T^2
T
2
tori doubling.Comment: 16 pages, 8 figure
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