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arXiv 2012.06223nlin.CD
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演化摆网络中混沌和超混沌的出现

Appearance of chaos and hyperchaos in evolving pendulum network

V. O. Munyaev, D. S. Khorkin, M. I. Bolotov, L. A. Smirnov, G. V. Osipov

摘要:

确定性混沌的研究一直是非线性动力学领域的重要问题之一。人们对低维动力学系统和耦合振子大系综中的混沌现象都有研究兴趣。本文研究了具有常转矩的局部耦合全同双链中时空混沌的产生。对混沌出现(消失)和性质的研究是由于以下方面的变化而完成的:(i)由于这个问题中耗散的影响而导致的元素的个体性质,以及(ii)考虑中的整个系综的性质,由相互作用的元素的数量和它们之间的连接强度决定。结果表明,在耦合力和单元数一定的情况下,系统耗散的增加会导致系统出现混沌,这是由于系统周期运动的级联倍周期分岔或不变环面破坏分岔的结果.混沌和超混沌可以通过添加或排除一个或多个元素而在系综中出现。此外,由于在这种情况下,控制参数是离散的,因此难以产生混沌。耦合强度对混沌发生的影响是特定的。混沌的出现是由小耦合和中等耦合引起的,是由于不同的异相旋转模区域的重叠而引起的。这些地区的边界确定解析和确认的数值实验。如果耦合强度足够强,链中不存在混沌区。

英文摘要:

The study of deterministic chaos continues to be one of the important problems in the field of nonlinear dynamics. Interest in the study of chaos exists both in low-dimensional dynamical systems and in large ensembles of coupled oscillators. In this paper, we study the emergence of spatio-temporal chaos in chains of locally coupled identical pendulums with constant torque. The study of the scenarios of the emergence (disappearance) and properties of chaos is done as a result of changes in: (i) the individual properties of elements due to the influence of dissipation in this problem, and (ii) the properties of the entire ensemble under consideration, determined by the number of interacting elements and the strength of the connection between them. It is shown that an increase of dissipation in an ensemble with a fixed coupling force and elements number can lead to the appearance of chaos as a result of a cascade of period doubling bifurcations of periodic rotational motions or as a result of invariant tori destruction bifurcation. Chaos and hyperchaos can occur in an ensemble by adding or excluding one or more elements. Moreover, chaos arises hard, since in this case the control parameter is discrete. The influence of the coupling strength on the occurrence of chaos is specific. The appearance of chaos occurs with small and intermediate coupling and is caused by the overlap of the various out-of-phase rotational modes regions existence. The boundaries of these areas are determined analytically and confirmed in a numerical experiment. Chaotic regimes in the chain do not exist if the coupling strength is strong enough.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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