The simulation of the stress-strain track structure condition on the section of variable rigidity made of reinforced concrete boxes.

Ensuring the stability of the railway track at the approaches to artificial structures is ensured by creating sections of variable stiffness in this zone, within which the stiffness of the track is leveled. The paper presents the results of studies on modeling the state of the structure of a section of variable stiffness (reinforced concrete boxes filled with crushed stone) when calculating the stress-strain state of bodies with anisotropic properties and their calculation-based determination. The inverse problem of forced frequency oscillations of a transversely inhomogeneous elastic layer of constant thickness is considered. By varying the values of the mechanical anisotropic characteristics of a structure with variable stiffness, it is possible to determine the confidence interval for the permissible values of frequency oscillations. Based on the mathematical solution of the engineering problem of deformation of the track superstructure under a moving dynamic load, curves of the vertical deflection of the rail were obtained for various parameters of the reinforcing structure. [ABSTRACT FROM AUTHOR]