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The subject of the study is energy efficiency of traction power supply system and traction electric drive of electric locomotives. The article is scientifically based on the assessment of the energy efficiency of the mutually connected system of electric traction of trains. The study is aimed at solving problems on reduction of voltage losses in the contact system, active power in the contact system and traction electric drive of electric locomotives. This is possible due to the full and continuous use of the electrical potential of the power supply system. The research methodology is based on the law of energy preservation, mathematical modeling of the energy process and spectral analysis of voltage and current on the current collector of the electric locomotive. Analytically and by results of calculation it has been proved that significant losses of voltage, active power in the contact system, traction electric drive of electric locomotives are caused by unsatisfactory operation of power regulators and mismatch of voltage level in the contact power network, which is necessary for realization of heavy and high-speed driving of trains. In order to eliminate the negative effect of the inductive coupling of AC traction power supply on the energy efficiency and speed of trains, it is proposed to increase the voltage in the DC contact system and develop power regulators of electric locomotives. Mathematical model of DC electric traction system shows possibilities of reduction of electric energy losses and increase of movement speed due to application of electric semiconductor variator for matching of high voltage in contact system with voltage of traction electric motors of electric locomotive.

The operational reliability of the electrification and power supply system and the associated traffic safety is mainly determined by the technical condition of the contact network-an element that is extremely difficult to reserve in any way. The state of the contact network devices of the East Siberian railway is indirectly characterized by periods of electrification of sections. The equipment of the contact network, put into operation in the 1960s and 1970s, has developed its design life, does not have the required load capacity enough and reduces the reliability of the electrified section. The article shows that the purpose of improving the reliability of electrical equipment in the operation of power supply devices is to predict the state of its elements, in particular the metal supports of the contact network, as an object of study. Correctly assess the state and resource of the contact network devices will allow the use of the latest diagnostic systems by personnel in practice, using mathematical apparatus and modeling methods. It is shown that by monitoring various parameters characterizing the support, it is possible to detect a change in the technical condition of the object of study in time and to carry out maintenance in the period of time when there are deviations of parameters beyond unacceptable limits. The statistical data on the state of the support economy at the VSZHD are summarized, the main types of damage to metal support and supporting structures are given. It is shown that new types of damage to metal structures, not classified earlier, are revealed, that qualitative and quantitative assessment of the state of metal supports of the contact network, which have various structural damage is possible using methods, modeling, simulation and evaluation of the state of structures. FEMAP, an independent computer-aided design system from Siemens PLM, is used as an independent full-featured environment for modeling, simulation and evaluation of the results of the analysis of the characteristics of metal supports of the M6/10 model

Research the fatigue crack initiation and the fatigue crack growth in rail with thermomechanical damage. On basis of cyclic test and numerical simulation of rail deflected mode was determine a fatigue failure characteristics and fatigue crack growth characteristic in rail steel.

In research consider a methodology the remaining life assessment of rail with fatigue crack in lower flange. Obtain the stress intensity factor equations for crack size and kind of stress: bending stress, thermal and residual stress. Make up an fatigue strength analysis of rail P65 and under different conditions of loading and remaining life calculation of damaged rail when given conditions of loading. Submit a assessment evaluation rail reinforcement in cyclic crack growth rate.