
Mathematical problems of nonlinearity
On Nonlinear Oscillations of a NearAutonomous
Hamiltonian System in the Case of Two Identical
Integer or HalfInteger Frequencies
O. V. Kholostova^{} ^{} Moscow Aviation Institute (National Research University),
Volokolamskoe sh. 4, GSP3, A80, Moscow, 125993 Russia
Abstract:
This paper examines the motion of a timeperiodic Hamiltonian system with two degrees
of freedom in a neighborhood of trivial equilibrium. It is assumed that the system depends
on three parameters, one of which is small; when it has zero value, the system is autonomous.
Consideration is given to a set of values of the other two parameters for which, in the autonomous
case, two frequencies of small oscillations of the linearized equations of perturbed motion are
identical and are integer or halfinteger numbers (the case of multiple parametric resonance).
It is assumed that the normal form of the quadratic part of the Hamiltonian does not reduce to
the sum of squares, i.e., the trivial equilibrium of the system is linearly unstable. Using a number
of canonical transformations, the perturbed Hamiltonian of the system is reduced to normal form
in terms through degree four in perturbations and up to various degrees in a small parameter
(systems of first, second and third approximations). The structure of the regions of stability and
instability of trivial equilibrium is investigated, and solutions are obtained to the problems of
the existence, number, as well as (linear and nonlinear) stability of the system’s periodic motions
analytic in fractional or integer powers of the small parameter. For some cases, conditionally
periodic motions of the system are described. As an application, resonant periodic motions of
a dynamically symmetric satellite modeled by a rigid body are constructed in a neighborhood
of its steady rotation (cylindrical precession) on a weakly elliptic orbit and the problem of their
stability is solved.
Keywords:
multiple parametric resonance, method of normal forms, stability, nonlinear oscillations,
periodic motions, dynamically symmetric satellite, cylindrical precession
Funding Agency 
Grant Number 
Russian Science Foundation 
19–11–00116 
This research was supported by the grant of the Russian Science Foundation (project 19–11–00116) and
was carried out at the Moscow Aviation Institute (National Research University). 
DOI:
https://doi.org/10.20537/nd210107
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MSC: 70H08, 70H12, 70H14, 70H15, 70M20 Received: 01.02.2021 Accepted:19.03.2021
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Citation:
O. V. Kholostova, “On Nonlinear Oscillations of a NearAutonomous
Hamiltonian System in the Case of Two Identical
Integer or HalfInteger Frequencies”, Rus. J. Nonlin. Dyn., 17:1 (2021), 77–102
Citation in format AMSBIB
\Bibitem{Kho21}
\by O. V. Kholostova
\paper On Nonlinear Oscillations of a NearAutonomous
Hamiltonian System in the Case of Two Identical
Integer or HalfInteger Frequencies
\jour Rus. J. Nonlin. Dyn.
\yr 2021
\vol 17
\issue 1
\pages 77102
\mathnet{http://mi.mathnet.ru/nd743}
\crossref{https://doi.org/10.20537/nd210107}
\mathscinet{http://www.ams.org/mathscinetgetitem?mr=4240819}
\scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2s2.085105171790}
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http://mi.mathnet.ru/eng/nd743 http://mi.mathnet.ru/eng/nd/v17/i1/p77
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