TY JOUR TI Improving the Traction and Energy Characteristics of Self-Contained Locomotives Through the Use of Modular Design of the Traction System Elements KW Traction rolling stock KW self-contained locomotive KW electric locomotive KW diesel locomotive KW single platform KW modular structure KW traction system KW power plant KW energy efficiency KW computer simulation JO Bulletin of scientific research results AU Talahadze, T.Z. AU Grebennikov, N.V. AU Bol'shih, I.V. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"