Bugaec N. Increase of carrying capacity of the rail and sleeper substructure of non-public railway tracks

The object is loading capacity of a rail fastening system for non-public railways; the aim is to solve the engineering problem of higher loading capacity of a rail fastening system for non-public railways. The methods involve a complex approach to the problems under consideration based on analytical methods of theoretical and structural mechanics with three-dimensional models to calculate interaction forces between the track and the rail vehicle, and loads on the rail fastening system, methods of finite elements to calculate and analyze a three-dimensional distorted rail fastening system, and methods of experimental investigation into the work of both the whole track and the rail fastening system; the novelty is determination of influence of a rail fastening system on three-dimensional elastic-dissipative parameters of rail supports of non-public railway lines considering levels of actual loads. It has also been given forecasting assessment of changes in elastic-dissipative parameters of a rail fastening system in operation, and determined the load level on a rail fastening system when running special rolling stock on non-public railways. For the first time it has been ascertained the impact of speeds, radii of curves, irregularities of the track, rail joints on a distorted rail fastening system. It has been investigated modes of deformation of a rail fastening system for non-public railways, and finally calculated the influence of construction peculiarities of special rolling stock and construction peculiarities of non-public railways on a rail fastening system. It has been calculated the vibration level in a rail fastening system for non-public railway lines, and for the first time it has been ascertained the influence of axial loads, speeds, construction peculiarities of a track on vibration accelerations inside the ballast and on the solid subgrade. The scientific approaches to calculation of permissible load capacity in the ballast and on the solid subgrade have further been developed considering peculiarities of non-public railway lines' operation. For the first time it has been determined efficient methods for strengthening a rail fastening system of non-public railway lines regarding higher loading capacity; the results obtained have made it possible to determine substantiated and efficient methods for strengthening a rail fastening system of non-public railway lines depending on their engineering and operational performance; the sphere of application is non-public railway lines, scientific and educational equipment.