TY JOUR TI OPTIMIZATION OF PARAMETERS OF TWO-STAGE VIBRATION MECHANISM WITH ASYMMETRIC OSCILLATIONS BY DYNAMIC COEFFICIENT KW unbalance vibrator KW asymmetrical vibrations KW vibration mechanism steps KW dynamic coefficient KW driving force JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Gerasimov, M.D. AU Vorob'ev, N.D. AU Ivanov, V.I. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov