TY JOUR TI Defect Detection on the Freight-Car Wheel Surface with a Monitoring Device Mounted on the Axle Box KW Digital freight car KW research tests KW diagnostics system KW accelerometers KW acceleration amplitudes KW rolling surface defect KW wheelset KW axle box JO Bulletin of scientific research results AU Solin, D.N. AU Shamray, A.A. AU Danilenko, D.V. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"