TY JOUR TI DETERMINATION OF CRITICAL FREQUENCIES OF ROTARY SYSTEMS WITH CONICAL-CYLINDRICAL SLIDING BEARINGS BASED ON THE ANALYSIS OF DYNAMIC COEFFICIENTS KW speed KW bearing KW stability KW coefficients KW stiffness KW Reynolds equation KW Routh-Hurwitz criterion JO Transport engineering AU Nguyen, T.. AU Liu, Y.. AU Kazakov, Y.N. AU Nastepanin, K.K. AU Savin, L.A. PY 2026 IS 2026 PB Bryansk State Technical University