Responses of Duffing oscillator with fractional damping and random phase

Yong Xu, Yongge Li, Di Liu, Wantao Jia, Hui Huang

科研成果: 期刊稿件文章同行评审

75 引用 (Scopus)

摘要

This paper aims to investigate dynamic responses of stochastic Duffing oscillator with fractional-order damping term, where random excitation is modeled as a harmonic function with random phase. Combining with Lindstedt-Poincaré (L-P) method and the multiple-scale approach, we propose a new technique to theoretically derive the second-order approximate solution of the stochastic fractional Duffing oscillator. Later, the frequency-amplitude response equation in deterministic case and the first- and second-order steady-state moments for the steady state in stochastic case are presented analytically. We also carry out numerical simulations to verify the effectiveness of the proposed method with good agreement. Stochastic jump and bifurcation can be found in the figures of random responses, and then we apply Monte Carlo simulations directly to obtain the probability density functions and time response diagrams to find the stochastic jump and bifurcation. The results intuitively show that the intensity of the noise can lead to stochastic jump and bifurcation.

源语言英语
页(从-至)745-753
页数9
期刊Nonlinear Dynamics
74
3
DOI
出版状态已出版 - 11月 2013

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