TY JOUR TI Modeling the Impact of a Freight Wagon Wheel with Two Non-Rejection Flat Spots on the Railway Track KW railway transport KW wheelset KW flat spot KW dynamic load KW “wheel — rail” system KW mathematical modeling KW non-rejection defect KW Pauk system (Automatic Derailment Control System) KW impact KW track JO Proceedings of Petersburg Transport University AU Adadurov, A.S. AU Podgrebennyy, I.M. AU Ivanov, A.N. AU Comaev, P.I. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"