Nonlinear Dynamics

, Volume 50, Issue 1–2, pp 341–352 | Cite as

2:1 Resonance in the delayed nonlinear Mathieu equation

Original Paper
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Abstract

We investigate the dynamics of a delayed nonlinear Mathieu equation:
$$\ddot{x}+(\delta+\varepsilon\alpha\,\cos t)x +\varepsilon\gamma x^3=\varepsilon\beta x(t-T)$$
in the neighborhood of δ = 1/4. Three different phenomena are combined in this system: 2:1 parametric resonance, cubic nonlinearity, and delay. The method of averaging (valid for small ɛ) is used to obtain a slow flow that is analyzed for stability and bifurcations. We show that the 2:1 instability region associated with parametric excitation can be eliminated for sufficiently large delay amplitudes β, and for appropriately chosen time delays T. We also show that adding delay to an undamped parametrically excited system may introduce effective damping.

Keywords

Averaging Degenerate Hopf Delay Nonlinear Mathieu Parametric excitation 
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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  1. 1.Department of Theoretical and Applied MechanicsCornell UniversityIthacaUSA

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