TY JOUR TI Mathematical modeling of thermodynamic processes in subway ventilation shafts KW ventilation shafts KW subway KW pressure KW stresses KW convection KW ground massive KW Metrogiprotrans method KW finite element method KW foam glass concrete JO Proceedings of Petersburg Transport University AU Sokornov, A.A. AU Kon'kov, A.N. AU Filonov, Y.A. AU Kozin, E.G. PY 2024 IS 21 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"