Vestnik of Samara State Technical University. Technical Sciences SeriesVestnik of Samara State Technical University. Technical Sciences Series1991-85422712-8938Samara State Technical University2133910.14498/tech.2019.2.%uResearch ArticleNumerical mathematical model demagnetization of rails in rail welding productionKhristinichA. R.Info@eco-vector.comKhristinichR. M.Info@eco-vector.comKhristinichE. V.Info@eco-vector.comKrasnoyarsk Institute of Railway Transport branch of the Irkutsk State University of CommunicationsKrasnoyarsk State Agrarian University150620192721361470603202006032020Copyright © 2020, Samara State Technical University2020<p>A three-dimensional numerical mathematical model is considered for studying the effectiveness of rail lash demagnetization in rail welding production. The main assumptions for solving the electromagnetic problem of the inductor-rail system are presented, the boundary conditions are determined, the current loads of the sources of the electromagnetic field are specified, and the boundary conditions of the problem are determined. The calculation of the electromagnetic field of the model inductor-rail is performed in the ANSYS software package. The numerical mathematical model allows to investigate the process of rail demagnetization when exposed to a lower frequency electromagnetic field. The effective parameters and characteristics of the rail demagnetization unit are determined to achieve the greatest effect of rail demagnetization.</p>three-dimensional numerical mathematical modelrail demagnetizationrail demagnetization deviceeffective parametersтрехмерная численная математическая модельразмагничивание рельсаустановка размагничивания рельсовэффективные параметры