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Bifurcation of Safe Basins and Chaos in Nonlinear Vibroimpact Oscillator under Harmonic and Bounded Noise Excitations

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  • Rong Haiwu
  • Wang Xiangdong
  • Luo Qizhi
  • Xu Wei
  • Fang Tong

Abstract

The erosion of the safe basins and chaotic motions of a nonlinear vibroimpact oscillator under both harmonic and bounded random noise is studied. Using the Melnikov method, the system’s Melnikov integral is computed and the parametric threshold for chaotic motions is obtained. Using the Monte-Carlo and Runge-Kutta methods, the erosion of the safe basins is also discussed. The sudden change in the character of the stochastic safe basins when the bifurcation parameter of the system passes through a critical value may be defined as an alternative stochastic bifurcation. It is founded that random noise may destroy the integrity of the safe basins, bring forward the occurrence of the stochastic bifurcation, and make the parametric threshold for motions vary in a larger region, hence making the system become more unsafely and chaotic motions may occur more easily.

Suggested Citation

  • Rong Haiwu & Wang Xiangdong & Luo Qizhi & Xu Wei & Fang Tong, 2014. "Bifurcation of Safe Basins and Chaos in Nonlinear Vibroimpact Oscillator under Harmonic and Bounded Noise Excitations," Journal of Applied Mathematics, Hindawi, vol. 2014, pages 1-10, December.
    • Handle: RePEc:hin:jnljam:967395
    DOI: 10.1155/2014/967395
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