Bielikov E. Features of work of intermediate fasteners of types TREP and TREP-Sh in conditions of non-genuine use

The dissertation is devoted to the experimental and theoretical research of the stress-deformed state of the underbreathing foundation with intermediate rail fastenings of the types TREP and TREP-SH taking into account the forces of interaction of the special and specialized rolling stock and the track in the conditions of non-garbage railways. The analysis of rail supports with fastenings TREP and TREP-Sh under spatial forces was conducted; the parameters forming spatial rigidities of these supports were defined. On the base of experimental research, both in laboratories and in the field, the rigidities of elastic elements of rail supports and the impact of loads on these parameters were defined, and dependencies of changes in spatial rigidities in operation were established. The changes considering some operational features of the vehicle/track system with the fastenings TREP and TREP-Sh were produced in the mathematical model of the spatial dynamics. Implementation of the design diagram of the track taken as a beam rested on many elastic supports with non-linear elastic-dissipative characteristics allowed considering additional dynamic forces being a result of an irregular rigidity of the rail foundation. The numerical methods were used in the research into spatial forces on the special and specialized track with the fastenings TREP and TREP-Sh. The influence of characteristics of the fastenings on the active forces was defined, and the comparative operational analysis of the track with the fastenings TREP, TREP-Sh and KB was made. The elements of the rail foundation with the fastenings TREP and TREP-Sh for non-public railways were modeled with the application of the finite element method in order to calculate the mode of deformation. On the base of multi-choice calculations the analysis of the mode of deformation of the rail foundation elements in various operational conditions for non-public railways was made. The practical recommendations for application of the fastenings TREP and TREP-Sh were given. The experimental works on the test section of a non-public railway with the fastenings TREP sleepers were conducted. The modern microprocessor-based video digital technology and computers were applied. The results and theoretical calculations were compared with the experimental data.