TY JOUR TI Dynamic Forces of Wheel Impact on Rail at Ballastless Track Structure RHEDA 2000 KW Ballastless track KW vertical dynamic forces KW Schlumpf method KW RHEDA2000 ballastless structure KW strain gauge method KW vertical dynamics coefficient JO Bulletin of scientific research results AU Ivanova, K.I. AU Kolos, A.F. PY 2023 IS 2023 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"