%0 Journal Article %T A Mathematical Model of External Forces Acting on the Train Traction System in Both Traction and Brake Modes %A Ripol'-Saragosi, T.L. %A Ripol'-Sragosi, L.F. %A Yaickov, I.A. %K Traction force, brake force, approximation, brake shoe, rheostatic braking %J Proceedings of Petersburg Transport University %D 2025 %N 22 %P 5 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"