Various ways of solving problems of oil film hydrodynamics with local inertia forces are investigated. Compact formulae for hydrodynamical reaction are received. On the base of these formulae several problems concerning synchronous precession and rotor stability are considered.
Analytically and a numerical integration method agency of an interior friction on dynamics of curls of turbo-compressors is explored. It is shown, that in the field of unstablis rotational speed the appearing self-oscillatory component can have rather small amplitude so level of the net vibration of a curl remains in permissible limits under some requirements.
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