Abstract
The main purpose of this paper is to explore the patterns of the bursting oscillations and the non-smooth dynamical behaviours in a Filippov-type system which possesses parametric and external periodic excitations. We take a coupled system consisting of Duffing and Van der Pol oscillators as an example. Owing to the existence of an order gap between the exciting frequency and the natural one, we can regard a single periodic excitation as a slow-varying parameter, and the other periodic excitations can be transformed as functions of the slow-varying parameter when the exciting frequency is far less than the natural one. By analysing the subsystems, we derive equilibrium branches and related bifurcations with the variation of the slow-varying parameter. Even though the equilibrium branches with two different frequencies of the parametric excitation have a similar structure, the tortuousness of the equilibrium branches is diverse, and the number of extreme points is changed from 6 to 10. Overlying the equilibrium branches with the transformed phase portrait and employing the evolutionary process of the limit cycle induced by the Hopf bifurcation, the critical conditions of the homoclinic bifurcation and multisliding bifurcation are derived. Numerical simulation verifies the results well.
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Acknowledgements
This work was supported by the Key Program of the National Natural Science Foundation of China (Grant No. 11632008) and the National Natural Science Foundation of China (Grant No. 11472116).
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Qu, Z., Zhang, Z., Peng, M. et al. Non-smooth bursting analysis of a Filippov-type system with multiple-frequency excitations. Pramana - J Phys 91, 72 (2018). https://doi.org/10.1007/s12043-018-1644-8
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DOI: https://doi.org/10.1007/s12043-018-1644-8