TY JOUR TI Accelerated Test Method for the Side Frames of the 18-9891 Model Innovative Bogie KW Load-bearing bogie KW side frame KW fatigue strength KW accelerated test method JO Proceedings of Petersburg Transport University AU Chernov, V.A. AU Danilenko, D.V. AU Cyganskaya, L.V. AU Komichenko, S.O. AU Efimov, V.P. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"