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2021 3

Main subjects

  • Transport

  • Computer science and control

  • Safety of human activity

  

Abstracts

M.S. Gromakov, S.V. Bespal'ko, O.I. Mironenko, A.V. Zyablov
Estimation of liquid pressure forces on the tank boiler side at bogie frame swaying

This article provides a method for estimating the liquid pressure forces on the side of a tank boiler at the swaying.
Keywords: car, tank, vibrations, liquid consignment, swaying, railway, dynamics

O.I. Verevkina, O.N. Popov, I.V. Martynyuk, A.I. Shevchenko
Algorithmization fundamentals of risk dynamics analysis of train operation safety violations for line departments of track facilities under process approach

This article covers the principles of the algorithm elaboration for the line departments of track facilities as a stage of automation of risk decrease measures taking into account the development of optimal measures of life cycle infrastructure. The authors describe the problems related to the regulatory documentation underlying the risk assessment.
Keywords: risk, dynamics, algorithm, digitalization, scheme, process approach

A.E. Yunitskiy, V.A. Garakh, M.I. Tsyrlin
SkyWay string transport for urban passenger transportation

The article explains the string transport distinctive features. The authors give the description of various types of string transport for urban passenger transportation and the advantages over classic kinds of transport.
Keywords: string transport, passenger transportation, urban transport, uniwind, unibike, unilight, unibus, unicar

Yu.A. Kol'tsov, A.A. Vorobyov, D.I. Bodrikov, V.P. Smirnov
Procedure for evaluating and determining of locomotive equipment operational life by monitored parameter measurement

At present, the state of traction rolling stock is of particular importance. This article gives a simpler method for practical application of analysis, evaluation and determination of equipment operational life by samples of monitored parameters. The method is based on groupings of specific parameters of the selected equipment.
Keywords: railway, parametric reliability, operational life, wheelset, durability indicators

E.V. Malovetskaya, R.S. Bol'shakov
Estimation of railway car flow fluctuation characteristics using prediction mathematical models based on time series

The authors propose an unconventional approach to assess the seasonal unevenness of railway car flows based on the construction of mathematical forecast models. The identification of models of the time series of fluctuations of car flows delivered at the junction points of railways is carried out based on a systematic approach with the possibility of predicting their volumes. The historigrams and correlograms are obtained.
Keywords: mathematical model, time series of car flows, system approach, fluctuation of railway car flows, prediction model

S.P. Vakulenko, N.Yu. Evreenova, I.Yu. Fedorov
On specialization features of Center-South railway direction

The authors consider the problem of high-speed railway traffic organization between the Center and the South of Russia. This article assesses the possible technological effects of the introduction of specialization technology in the Center-South direction and the proposals on the main areas of further research in the field of specialization of railway directions.
Keywords: specialization of railway directions, classification of railway lines, traffic organization

V.P. Sychev, D.V. Ovchinnikov, A.Yu. Abdurashitov, A.V. Sycheva
Procedure for determining railway track life depending on its operating conditions

A method of determining the railway track life depending on its operating conditions has been developed, taking into account not only the power parameters of the impact on the track from the rolling stock but also the rail deflected mode during loading directly at the point of contact with the wheels, as well as flexural stresses in the rail base.
Keywords: railway track, rails, modelling, rail deflected mode, operational life

V.A. Eroshin, A.V. Boyko
Experimental determination of caterpillar traction during rolling on the water surface

The article describes the rolling conditions of caterpillar systems with grousers on water. The authors simulated this phenomenon and obtained the dependence of draught and bearing capacity of wheel systems on the Froude number, and present the dependence of caterpillar traction on a dimensionless parameter equal to the ratio of absolute speeds of the lower part of the caterpillar and the surface part of the model.
Keywords: ideal incompressible fluid, caterpillar, water rolling, hydrodynamic forces, physical simulation

V.A. Bogachev, A.S. Kravets, O.V. Ignat'eva, T.V. Bogachev
Mathematical methods in distribution optimization of grain freight flows directed to small ports of the Azov-Black Sea basin

Within the framework of the egalitarian concept, a comprehensive approach has been developed in welfare theory in finding rational schemes for the distribution of freight flows in a multimodal transport and technological system. The authors propose an optimization model of a regional freight transportation process, and its mathematical implementation is an integer programming problem solved with a computer algebra system.
Keywords: rail transport, freight traffic, multiagency, distribution of freight flows, Pareto criterion

V.N. Alekseev
On the question of vibrations of the elastic medium caused by the action of uniformly distributed concentrated force

The article considers the plane-polarized wave motion of the elastic medium. The expressions for scalar and vector potentials of such motion are obtained, which allows determining the components of displacements and stresses arising in media.
Keywords: isotropic-elastic medium, longitudinal and transverse waves, scalar and vector potentials, plane-polarized motion, Bessel and Hankel functions

A.A.Vorobyov, V.A. Karpov, D.M. Mayakov
Calculation of reliability indicators of 2TE25KM diesel locomotive equipment

The article describes the method of calculation of reliability indicators of the 2TE25KM diesel locomotive equipment based on the results of operating time before and between failures. The test was carried out on the example of the results of a study of more than 3,000 failures of 145 2TE25KM diesel locomotives operating on the Moscow and North Caucasus Railways from 2015 to 2018.
Keywords: reliability, reliability indicators, traction rolling stock, failures, 2TE25KM diesel locomotive, equipment

D.G. Evseev, A.V. Korobkin
Condition and features of screen medium (ground effect) when moving a high-speed amphibious aircraft

The article first proposes and justifies the hypothesis about the characteristics of the screen environment, the knowledge of which allows more consciously designing high-speed amphibious aircraft and on this basis optimizing the design features of the ekranoplan.
Keywords: high-speed amphibious aircraft, screen medium (ground effect), underlying surface, condensed medium

E.A. Seredov
Using fuzzy set theory to determine the required number of train units

This article considers the determination of the required number of train units on a particular section of the railway, taking into account the preferences of passengers and the cost estimates of trains by the method of paired comparisons. The method used is based on the theory of fuzzy sets and makes it possible to switch to the general scale of measurements while preserving the values of the criteria.
Keywords: train unit, method of paired comparisons, fuzzy sets

E.P. Balakina, L.A. Baranov, V.G. Sidorenko
Scenario approach in the training of operational personnel of urban rail transport systems

The basis of the transition to a scenario approach is the concept of traffic operation using situational management. The classification of the parameters of the situational approach to the metro line is given. The authors consider the scenario approach in the training of operational personnel of urban rail transport systems on the example of the underground system and describe the methodology for scenarios development of operational personnel training.
Keywords: training simulators, training of operational personnel, situation management, learning scenarios

A.A. Loktev, P.V. Sychev, V.A. Aksyonov, A.S. Pikalov, V.P. Sychev
Ensuring the safety of personnel of track machine complexes taking into account their life cycle modelling

The article discusses particulars of mathematical modelling of life cycle stages of track machine complexes with different technologies of track operations formed from different units of special rolling stock. The model takes into account the features of special rolling stock operations in terms of the impact on increasing its level of safe operation and reducing injuries.
Keywords: modelling, special rolling stock, railway track, reliability, safety, labour protection

O.I. Poddaeva
Predictability of dangerous areas during aerodynamic impact on large-span bridge structures

The article deals with issues related to ensuring the safety of workers operating on large-span bridge structures, taking into account the wind impact. The main approaches to solving the problem of the dynamic interaction of bridge structures and wind flow are presented, including experimental studies and numerical modelling, with subsequent identification of dangerous areas of workers on the structure. Based on the results of the study, the need was identified to determine the parameters of dangerous areas for workers and to finalize labour protection standards.
Keywords: bridge structure, vibrations, wind tunnel, experimental modelling, numerical procedures, CFD

M.V. Grafkina
Some aspects of industrial injury statistics in transport

The article presents some aspects of statistics of industrial injuries in transport based on the Rostrud (Federal Service for Labour and Employment) data analysis. The impact on statistics on injuries of classification by types of economic activity, inspection measures of authorized bodies, modes of transport is shown. Statistical analysis is necessary to make informed decisions on occupational health management to minimize accidents at work.
Keywords: industrial injuries, transport, statistics, road transport, causes of injuries

A.M. Sazonova, D.P. Gurt, M.V. Kvitkina, E.V. Staseva
Research and analysis of injuries in road construction

The authors carried out the research and ranking of accidents at the road construction facilities according to the types of work performed dangerous factors and causes of their occurrence to identify general trends and develop preventive measures.
Keywords: road construction, industrial injuries, causes of injuries, working conditions, safety