Review article

The issue of building the closest to reality mathematical model of a system of superstructures and high-speed trains is one of the most pressing topics in the field of calculation, design and construction of railway bridges. This work is devoted to the study of the dynamic behavior of superstructures under conditions of high-speed traffic. Structural and rail elements are simulated using the finite element method with rod finite elements. The calculation was carried out by direct dynamic analysis in a linear formulation using dynamic nodal loading. Based on the results, there were obtained the dependences of the largest vertical dynamic displacement on time for different vehicle speeds and different concentrated moving forces. The results show the possibility of adopting the current 3d model to determine the dynamic response of superstructures under the influence of concentrated moving forces.