Abstract.
Systems which admit waves via Hopf bifurcations and even systems that do not undergo a Hopf bifurcation but which support weakly damped waves may, when parametrically excited, respond quasiperiodically. The bifurcations are from a limit cycle (the time-periodic basic flow) to a torus, i.e. Naimark—Sacker bifurcations. Floquet analysis detects such bifurcations, but does not unambiguously determine the second frequency following such a bifurcation. Here we present a technique to unambiguously determine the frequencies of such quasiperiodic flows using only results from Floquet theory and the uniqueness of the self-rotation number (the generalization of the rotation number for continuous systems). The robustness of the technique is illustrated in a parametrically excited Taylor—Couette flow, even in cases where the bifurcating solutions are subject to catastrophic jumps in their spatial/temporal structure.
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Received: November 6, 1997; revised: March 21, 1998
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Lopez, J., Marques, F. Determining the self-rotation number following a Naimark—Sacker bifurcation in the periodically forced Taylor—Couette flow. Z. angew. Math. Phys. 51, 61–74 (2000). https://doi.org/10.1007/PL00001507
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DOI: https://doi.org/10.1007/PL00001507