TY JOUR TI Testing the methodology for justifying the service life of freight cars based on the results of analog car testing KW freight car service life KW extending freight car service life KW service life justification methodology JO Bulletin of scientific research results AU Cyganskaya, L.V. AU Hamraeva, E.R. AU Narkizova, E.A. PY 2024 IS 2024 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"