%0 Journal Article %T Features free and compelled fluctuations of mechanical systems %A Belyaev, A.. %K the compelled fluctuations, free fluctuations, oscillatory system %J Actual directions of scientific researches of the XXI century: theory and practice %D 2014 %N 2 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov