TY JOUR TI Rayleigh damping influence on railway subgrade stability during seismic action KW Railway subgrade KW seismic impact KW finite element method KW stability KW Rayleigh damping KW damping layer JO Bulletin of scientific research results AU Merkur'ev, Y.S. PY 2024 IS 2024 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"