Abstract
Stochastic P-bifurcation in a self-sustained tristable oscillator subjected to two random excitations is explored. The self-sustained oscillator here has two stable limit cycles and a stable state, which is known for modeling the flutter of airfoils with large span in low-speed wind tunnels. By means of the stochastic averaging method, the stationary probability density function of the system amplitude for characterizing stochastic P-bifurcation is derived. The stationary probability density function can be easily transferred between the unimodal, bimodal and trimodal structure according to the critical parameters displayed in the bifurcation diagram. The effects of two noises and time delay on stochastic P-bifurcation are analyzed theoretically, whose correctness is verified numerically. The involvement of two noises and time delay not only expands the range of bifurcation parameters, but also enriches the bifurcation phenomenon.
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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: During the writing of the paper, the parameters of theoretical analysis and numerical simulation are clearly described in the paper. Therefore, the data will not be deposited.]
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Acknowledgements
This work was partially funded by the National Natural Science Foundation of China under Grant no. 11202120. The authors also would like to express their appreciation to the reviewers for their insightful reading and helpful comments.
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Lijuan Ning and Yingying Wang designed the research; Yingying Wang performed the research; Lijuan Ning and Yingying Wang wrote the manuscript and revised it.
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Wang, Y., Ning, L. Stochastic P-bifurcation in a self-sustained tristable oscillator under random excitations. Eur. Phys. J. B 95, 34 (2022). https://doi.org/10.1140/epjb/s10051-022-00286-0
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DOI: https://doi.org/10.1140/epjb/s10051-022-00286-0