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One of the many topics on which he worked V.V. Lukin in end of his life, was to improve the cast parts bogies freight wagons using the finite element method. In this paper the authors shows that the method of finite element analysis of the stress-strain state of two of the most essential parts a three-element bogie freight cars to further improve the their design.

Currently, in the brake system of operated cars, there is a problem of lack of brake pressure on the wheel, which is necessary for the movement of the train at a set speed in accordance with the regulatory documentation. This is due to the tendency to increase the mass of trains and the maximum load of cars with a constant tare weight, which requires an extended range of pressure control in the brake cylinder by an air distributor or auto mode, depending on the load of the car. To solve this problem, calculations were made of the braking coefficient of cars equipped with air distributors № 483, which showed that the freight car was not equipped with brakes to run as part of a train at a set speed. In the course of engineering studies, it turned out that increasing the spring rate of loaded and medium modes can increase the adjusting range of the air distributor and partially solve the problem of lack of brake pressure. Thus, it is proposed to recalculate the stiffness of the adjusting spring. Calculations of the rigidity of regular and proposed springs were made. The braking coefficient has been recalculated, taking into account the increased spring constant. As a result, this coefficient has increased, which makes it possible to remove speed limits. The proposed method for upgrading the air distributor can be carried out on all types of repairs, which facilitates the implementation process.

The state of industrial injuries during operation and repair technology of power supply devices in the power complex of Russian Railways, which confirms the relevance of the development and implementation of methods and technical means of protecting electrical personnel of the power complex of Russian Railways from electrical injury. The analysis of existing methods of maintenance, operation and repair technology of the contact network is carried out. An innovative solution is proposed in the field of electrical safety of personnel of the energy complex of JSC "Russian Railways" through the creation of a single high-precision coordinate space of power supply devices, implemented on the basis of mechanisms for using the global navigation satellite systems GLONASS / GPS.Considered the implementation of power supply and sectioning circuits and main electrical connections in the form of a digital model, which has a mathematical description of the geometric characteristics and spatial position of the contact network; feeding feeders; overhead lines: longitudinal power supply, automatic blocking, centralization and blocking, lines «two wires - rail», lighting; waveguide and other objects of power supply and electrification of railways. On the basis of modeling dangerous situations of electric shock, the electrical personnel of the power complex of JSC «Russian Railways» during the maintenance and repair of overhead contact network devices in all categories of work substantiated the effectiveness of the implementation of a spatial database in the form of a digital model of contact network devices. The use of a digital model of the overhead contact network will increase the level of electrical safety during maintenance and repair of overhead contact network devices and reduce the level of electrical injury to employees of the power complex of Russian Railways.

The contact network is one of the most vulnerable elements of the traction power supply system. The prevailing number of events in the power supply sector is connected with the contact network. The article is devoted to the method of contactless diagnostics of the contact network of electrified Railways. The paper proposes to use a method for diagnostics of the contact network based on optical elements, followed by digital data processing and calculation of geometric parameters. This method is characterized by a low cost of the device in contrast to analogues and high accuracy of calculation. The analysis and selection of optimal installation locations for optical devices is given. The method of contactless diagnostics of wires of the contact network of electrified Railways is presented.

The main subject of this article is consideration of the possibility of applying in electric circuit of the diesel locomotive hybrid power sourse, thats consists of diesel internal combustion engine and traction energy storage (li-ion accumulator battery). The main target of this work is to describe the effectiveness of the applying Li-ion energy storage in traction and diesel internal combusion engine start modes. At the same time, the regular used lead-acit battery is excluded from the locomotive circuit and replaced by a traction accumulator battery. By using numerical simulation methods, the article considers the possibility of starting a diesel internal combustion engine with a traction li-ion accumulator battery and possibility of the increasing the torque of electric traction motors and technical characteristics of the locomotive when the li-ion traction accumutalor battery is turned on as an additional source of energy. The relevance of the results is to get data about increasing carrying mass of the train when using a hybvid energy source on a diesel locomotive. The results of the work demonstrate the effectiveness of the use of a traction battery it traction and engine start modes, while improving the performance of the locomotive. The conclusions of the work contain an analysis of the results of mathematical modeling of the use of a traction battery.

Various converters are operated at electric railways traction substations whose rectifiers design includes plug-in power rectifiers and pill ones. Such a variety of rectifiers design causes the problem of the power supply reliable operation unavailability both of volumes and of quality information concerning the characteristics and diagnostic parameters of power semiconductors rectifiers. For a possible prediction of the diodes and thyristors proper operation, new instruments as well as simple technologies of the preventive diagnostics, correspondent to the state and industry standards and instructions should be developed. One of the most accurate methods to determine not only the serviceability of rectifiers but also to forecast their wear - life, is the diagnostic method of recurrent peak backward current. This method is the basis for the design of a peak backward current meter which is used on the Western-Siberian railway. Using this device the screening of about thirty thousand rectifiers was carried out which resulted in the sorting of out-of-work rectifiers, predicting long term rectifiers conditions. The statistical analysis of the research allowed to determine the number of measures to improve the reliability of traction substations converters.

The article deals with the introduction of a twenty - four pulse rectifiers with various rectification circuits on direct current traction substations. The results of the operation of a twenty-four-pulse rectifier installed at one of the traction substations prove the expediency of using such a converter. The variants of the existing equipment modernization, which is a part of the six- and twelve-pulse rectifiers in order to use it in the creation of twenty-four-pulse rectifiers, as well as the requirements for the creation of such rectifiers in industrial design are given.

We propose the concept of the new system for monitoring and electricity metering on the feeders of the D.C. contact network. The system is based on previously designed prototype that has been put into operation, and differs from it in new solutions that allow to achieve greater mobility and simple scalability. We describe the basic technical solutions, the system functions as well as its potential.

Developed Methodology let make the calculation of coaxial cable parameters with account of the frequency of the transmitted signal. The comparative analysis of parameters of RC 50-7-28 and RG142 cables has been made with the values have been got by the measuring with the circuit analyzer according to the reference book with the results of the calculations. Check the accuracy of the calculation has pointed out the necessity for account of complementary factors for the purpose of much more correct account cable attenuation in the frequency spectrum.