HAVRYLOV M. Improvement of the Technology of Railway Track Alignment in the Plan and Longitudinal Profile

The dissertation is devoted to development of a method of reconstruction of a track with use of the advanced technology of machine correction of a railway track in the plan and a longitudinal profile on the basis of the analysis of its geometrical position in curves. The theory and practice of railway track straightening technology with the use of modern track machines are analysed in the work. A new method of studying the geometric position of the railway track in the curves is proposed, which makes it possible to estimate its deviations and predict the development of these deviations depending on the operating conditions of the railway track. In the dissertation the definition of estimation of accuracy of position of a railway track in the plan and a profile with use of the automated systems on the basis of results of experiment has got further development. The evidence base for the adequacy of the application of involute and spline models of curve correction calculations in the plan is significantly expanded. A mathematical model for the control of mechanized track straightening in the longitudinal profile has been developed. The directions of development of measuring means of modern track machines on the example of application of computer system of track correction for tamping machine type machines are offered. The results of the dissertation will be useful for planning track repairs in order to increase the smoothness of trains, ride comfort, reduce the cost of track work, and the introduction of accelerated and high-speed train traffic. Experimental researches of the developed mathematical tool for calculation of correction of a track in the plan and a longitudinal profile by cars like tamping machine are carried out. The experiment showed the adequacy of the developed mathematical tool. The use of a tamping machine with an automated track straightening system in the plan and longitudinal profile and a mathematical tool implemented in it allowed to reduce the qualification requirements of service personnel, increased the speed of work, reduce the duration of the "window" for these works to 14%.