Abstract
The problem of calculating the period of second order nonlinear autonomous oscillators is formulated as an eigenvalue problem. We show that the period can be obtained from two integral variational principles dual to each other. Upper and lower bounds on the period can be obtained to any desired degree of accuracy. The results are illustrated by an application to the Duffing equation.
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REFERENCES
Y. Biollay, Problème aux limites non-linéaire y''+λ 2 f(y)=0: Existence d'une solution et bornes pour λ 2(évaluations de la valeur critique), ZAMP 27:877–881 (1976).
R. D. Benguria and M. C. Depassier, A variational principle for eigenvalue problems of Hamiltonian systems, Phys. Rev. Lett. 77:2847–2850 (1996).
R. D. Benguria and M. C. Depassier, Phase space derivation of a variational principle for one-dimensional Hamiltonian systems, Phys. Lett. A 240:144–146 (1998).
R. D. Benguria and M. C. Depassier, A variational method for nonlinear eigenvalue problems, in Advances in Differential Equations and Mathematical Physics, E. Carlen, E. Harrell, and M. Loss, eds., Contemporary Mathematics, Vol. 217 (Amer. Math. Soc., 1998), pp. 1–17.
I. Ekeland and R. Témam, Convex analysis and variational problems, Classics in Applied Mathematics, Vol. 28 (SIAM, Philadelphia, 1999).
D. D. Joseph, Nonlinear heat generation and stability of the temperature distribution in conducting solids, Int. J. Heat Mass Transfer 8:281–288 (1965).
H. Kleinert, Path Integrals in Quantum Mechanics, Statistics Polymer Physics, and Finantial Markets, third extended edition (World Scientific, Singapore, 2003).
T. Laetsch, The number of solutions of a nonlinear two point boundary value problem, Indiana Univ. Math. J. 20:1–13 (1970).
A. Pelster, H. Kleinert, and M. Schanz, High-order variational calculation for the frequency of time-periodic solutions, Phys. Rev. E 67:016604 (2003).
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Benguria, R., Depassier, M.C. Variational Calculation of the Period of Nonlinear Oscillators. Journal of Statistical Physics 116, 923–931 (2004). https://doi.org/10.1023/B:JOSS.0000037219.42798.f7
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DOI: https://doi.org/10.1023/B:JOSS.0000037219.42798.f7