TY JOUR TI Physical interpretation of the railway track’s equivalent mass coefficients in track strength calculations KW railway track KW track-rolling stock interaction KW impact of wheel-rail vertical forces KW track strength calculation KW reduced track mass KW α0 and α1 coefficients JO Bulletin of scientific research results AU Antonov, A.Y. AU Blazhko, L.S. PY 2026 IS 2026 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"