Abstract—
The problem of motion of a point particle on the surface of a homogeneous gravitating ball with a spherical cavity is considered. It is assumed that the body rotates uniformly around its axis of symmetry. At the same time, it is assumed that a particle located on the outer or inner (inside the cavity) surface of the body, in addition to the force of gravity, is affected by dry friction. The gravitational properties inside the cavity and outside the ball are described. The dependence of the existence, bifurcations, and stability of the relative equilibria of a point particle on the outer or inner body surface on the parameters of the problem is studied. The results obtained both analytically and numerically are presented in the form of bifurcation diagrams. The research is motivated by the possible existence of cavities or mass concentrations (mascons) in large and small celestial bodies.
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Funding
This research is partially supported by the program of the President of the Russian Federation for the federal support of young Russian scientists, candidates of science (project no. MK-1712.2019.1) and by the Russian Foundation for Basic Research (project no. 18-01-00335).
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Translated by N. Petrov
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Burov, A.A., Nikonov, V.I. & Shalimova, E.S. On the Motion of a Point Particle on a Homogeneous Gravitating Ball with a Spherical Cavity in the Presence of Dry Friction. Mech. Solids 56, 1587–1598 (2021). https://doi.org/10.3103/S0025654421080045
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DOI: https://doi.org/10.3103/S0025654421080045