Spiryagin V. Improvement of dynamic interaction between the locomotive and railway track.

Thesis is research for the estimation of the influence of the change for the design of a locomotive underframe and its parameters on dynamic interaction between wheels of railway vehicles and the rails. Usage of the imitation model, which is based on the imitator of adhesive forces, the imitator of locomotive underframe and mathematical model of locomotive, and by means of complex criterion allows for the estimation of dynamic tractive characteristics of the locomotive and for the forecast of wear of wheel pairs by using theoretic-experimental method for determination of a wear of wheel pair. The proposed mathematical model of the locomotive contains the cooperative work of mechanical and electric parts of the vehicle, friction conditions of rail-wheel contact, longitudinal oscillations of a train, the influence of the rigid characteristics of spring suspension and equipment for radial installation of wheel pair on dynamic processes in "locomotive-railway track" system for straight and curving parts onhorizontal and vertical planes. The mathematical model was checked by means of comparison calculation results with experimental data. The estimation of dynamic tractive characteristics of locomotive 2TE116 with serial bogies and with radial installation of wheel pairs' bogies was made. The estimation of a wear of wheel pairs for these two types of locomotives was executed. The rigid characteristics of the link between a wheel pair and a bogie and constructions for improving of dynamic and tractive characteristics were proposed.