TY JOUR TI Estimation of the Service Life of the TEM2 Shunting Locomotive Main Frame on the Uzbekistan Railways KW Shunting locomotive KW bogie KW dynamic loading KW fatigue curve KW stress-strain state KW multi-cycle fatigue KW safety factor KW fatigue life KW residual resource KW track irregularities JO Bulletin of scientific research results AU Grigor'ev, P.S. AU Kodirov, N.S. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"