TY JOUR TI Mechanical oscillations systems. equivalent forms of mathematical models KW lever ties KW quasisprings KW the given ruggedness KW adequacy of lever schemes KW equivalent settlement schemes JO Actual directions of scientific researches of the XXI century: theory and practice AU Kaimov, E.. AU Kashuba, V.. AU Kinash, N.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov