TY JOUR TI IMPROVEMENT OF STRENGTH CALCULATION PROCEDURE OF CAR SIDE UPPER FRAMING IN GONDOLA CARS KW freight car KW gondola car KW car computation scheme KW strength computation KW finite element method JO Bulletin of Bryansk state technical university AU Bulychev, M.A. AU Antipin, D.Y. PY 2019 IS 2019 PB Bryansk State Technical University