Selection and substantiation of main design parameters of catenary suspension for three-phase traction power supply system on tangent level track

At development of common concept of current collection for three-phase traction power supply system there is the need to select and substantiate main design parameters of catenary suspension. For this purpose, the authors have carried out analytical calculations and developed a numerical mathematical model that allows assessing catenary statics and it’s dynamics in interaction with current collector. On the basis of results of modeling, the authors have substantiated and selected all the required parameters. In particular, they have determined the permissible speed of trains and maximal length of catenary spans.

Simulation study of development and elimination dynamics of bottlenecks in task of location of railway emergency facilities

The paper studies the influence of a transport accident on operation of a polygon, compares theoretical and practical variants of operational environment progress. With the use of simulation modeling the author has thoroughly analysed the process of train situation progress and has determined the economic losses from forced delays of trains of various categories, which can be recommended for the application at solving the task of location of emergency trains on polygons.

Organization of transport production of permanent way work with the consideration for information modeling

The JSC «RZD» Long-term program up to 2025 envisages a digital transformation of railway transport. It dedicates a special attention to information and digital technologies of modeling advanced development of infrastructure for provision of growing traffic, increase of production efficiency, provision of expected result of traffic safety and industry economics in whole. The paper presents a design of the information model for infrastructure control within the framework of introduction of the BIM RZD Automated Control System on the example of organization of transport production of permanent way work.

Development of tests of increased reliability sensors for inspection system of axle box heating

All the domestic passenger cars since 1960 are produced only on bogies with roller bearings. A transition to roller bearings demanded the cars to be equipped with inspection system of axle box heating. It is necessary because axle box be heated over a specified temperature that leads to deterioration of the oil lubricity. The main element of the inspection system of axle box heating is a thermal sensor that is installed on each axle box. Nowadays, bolster bogies of all models are equipped with type 393 thermal sensors. At introduction of new bolsterless bogies the installation of the type 393 thermal sensors on the axle boxes was carried out with the use of special brass adapter. The observations in operation showed insufficient reliability of the inspection system of axle box heating in bolsterless bogies. Consequently, the authors have carried out research on new increased reliability thermal sensors. The pilot batch has passed preliminary and acceptance rig tests. On the results of the rig tests it has been decided to carry out an under-control operation on mainline passenger cars. The under-control operation with new sensors has been carried out on the basis of the Novosibirsk passenger wagon depot. On the basis of its results the authors have established the required temperature of the inspection system of axle box heating actuation.

Assessment of efficiency of distribution centre at different variants of freight traffic consolidation

For the determination of a potential benefit from creation of a distribution centre the paper proposes a method and presents results of calculation of a decrease of total number of rides and total run of automobiles at various variants of goods consolidation. The authors have established a positive influence of the centre on intracity transportation. At the same time, high efficiency of the considered technology can be reached by involvement of a bigger number of consignees and by consolidation of a relatively small number of goods batches in one automobile at efficient routing and correct selection of location of a distribution centre.

Carrying load of column poles of railway bridges that are designed according the I-st principle on permafrost ground

The paper presents results of development of a method for determination of carrying load of column poles of railway bridges that are based on permafrost ground and designed according the I-st principle. It also shows the necessity to use methods of mathematical modeling for determination of thermal mode of permafrost ground in the foundation of artificial constructions, which will allow forecasting the carrying load of bridge poles for any term of operation. As a result, the paper shows an algorithm for calculation and forecasting of carrying load of bridge poles at degradation of permafrost in their foundation.

Calculation of operating costs on change of train weight

The urgency of studying this issue when designing a new railway line in the Irkutsk region is shown. The existing methodology for calculating operating costs on change of train weight is considered and the main questions for the study are formulated. The dependences of the annual operating costs associated with the change of train weight on the smaller mass of the train at the point of change of train weight are investigated. A program for calculating operating costs on change of train weight has been developed. A test example is considered for two variants of the route of the projected line with diesel traction (locomotive type - diesel locomotive 2TE10M) when the mass of the train is broken at the Uzlovaya station.

Perspectives of application of complex-reinforced concretes in engineering structures of transport infrastructure objects

The paper substantiates a necessity to improve operational properties of building products and structures that are used at construction of transport objects. It shows that the modern approach to design ated problem is in the course of fibre reinforcement of fused and cellular concretes. The work provides reference and experimental data on the level of positive influence of metal and synthetic fibre on operational properties of concretes of various structures. On the basis of experimental results the authors have presented a fundamental possibility of complex improvement of engineering structures properties by using bar fibre-glass reinforcement. As a result, they have formulated a number of perspective technologies suitable for creating building elements from fibre and complexreinforced concretes for transport objects.

Automatic system for monitoring parameters of railway rolling stock wheelsets

The paper considers operating principles of an automatic measuring system for monitoring the control condition of railway rolling stock wheelsets developed by the team of authors. The paper also presents the description of the system and the hardware implementation of devices integrated in its composition.

Features of current distribution in the traction rail network for heavy-haul traffic

The paper investigates the limits of change in resistance value of traction rail network elements due to dynamic loads arising during the movement of trains with increased weight and length. An augmented electric diagram of rail joint with a duplicating junction coupler taken into account has been presented. The ways of traction current flow during simultaneous passing of heavy-weight trains along the adjacent track connected by intertrack junctions have been determined. Conclusions have been made about the necessity of constant monitoring of traction rail network elements condition, which can be ensured only by implementing special automated systems.