TRANSLATIONAL-ROTATIONAL MOTION OF A NONSTATIONARY AXISYMMETRIC BODY
Ключевые слова:
variable mass, translational-rotational motion, axisymmetric body, secular perturbations.Аннотация
A nonstationary two-body problem is considered such that one of the bodies has a spherically
symmetric density distribution and is central, while the other one is a satellite with axisymmetric dynamical
structure, shape, and variable oblateness. Newton’s interaction force is characterized by an approximate expression
of the force function up to the second harmonic. The masses of the central body and the satellite vary isotropically at
different rates and do not occur reactive forces and additional rotational moments. The nonstationary axisymmetric
body have an equatorial plane of symmetry. Thus, it has three mutually perpendicular planes of symmetry. The axes
of its intrinsic coordinate system coincide with the principal axes of inertia and they are directed along the
intersection lines of these three mutually perpendicular planes. This position remains unchangeable during the
evolution. Equations of motion of the satellite in a relative system of coordinates are considered. The translationalrotational
motion of the nonstationary axisymmetric body in the gravitational field of the nonstationary ball is studied
by perturbation theory methods. The equations of secular perturbations reduces to the fourth order system with one
first integral. This first integral is considered and three-dimensional graphs of this first integral are plotted using the
Wolfram Mathematica system.
