«Approaches to modeling occurrence of rolling contact fatigue damages in rails»

Contact fatigue damages in rails along with rail wear are the most common types of rail defects, including new generation rails.  Over the last years there have been significant changes in the classification of types of contact fatigue damage on both Russian and foreign railways, especially those working in conditions of heavy haul traffic. Therefore, it is current to study the mechanisms and modeling the appearance of rolling contact fatigue damages in rails. The authors consider modern approaches to such modeling.

«Development of an improved wheel profile for a freight car. Theoretical justification»

A technique for designing a wheel profile is proposed and the results of its application for developing a new wheel surface form for freight cars with axial loads more than 25 t.  Wheels measurements of the model cars 12-9853 installed on bogies 18-9855, which were under control operation, were used as the basic data.

«Accounting of energy consumption of passenger electric Locomotives in locomotive operational depots»

The comparison of specific costs of electrics locomotives: dual mode with asynchronous tractive motor ЭП20, direct current ЭП2К, alternate current ЭП1М with rotational motor when driving with the same type of passenger cars. With an electric motive power for a direct current system, the specific power consumption of the ЭП20 is significantly higher than the consumption of the ЭП2K; with an electric motive power according to the AC system, the consumption of the ЭП20 locomotive is almost equal to the specific consumption of the ЭП1М electric locomotive. An analysis of potential reasons of increased energy consumption by an electric ЭП20 locomotive is given, recommendations are given.

«Efficiency of adjustable few-stage filter compensating installations in an AC traction network»

The experience of regulated filter compensating installations in an AC traction network (ФКУ) of domestic railways indicates the need to develop a standard version of an economical adjustable installation for their wide use in the traction power supply system. The development can be based on the presented version of switchable ФКУ as the most effective at the modern stage, taking into account the specifics of the power supply of the traction network.

«Test results of resonance single-wire system for power transmission to infrastructure objects of JSC RZD»

Electric supply challenges of remote customers must be settled on the base of new generation electric systems with use of overfrequency that allows creating electric fixtures with much smaller mass-dimensional dimensions than existing. There are represented test results of test model of resonance single-wire system for power transmission at overfrequency on the distance 2000 m. Resonance line is secure, it does not create step-by-step tension and the electromagnetic field level meets Sanitary Rules and Norms requirements .

«Follow up system to train electric-dynamic breaking of direct current with collector driving motor»

Follow up system to train electric-dynamic breaking manages управляет electromagnetic processes in the power circuit in a motor coach  by special algorithm. The result is relative increase into the system of traction energy. Reducing energy consumption due to implementation of follow up system at operational electric multiple unit will make up 4,5 %.

«Vibration damping of material dynamic forces applied at ballast and non-ballast track. Polymer shim plate»