44 articles in this issue
M. M. Biliaiev,O. V. Koptyla
A 2D computer model to simulate air pollution after liquid ammonia leakage accidents has been developed. The model is based on numeric integration of diffusion equation and convectional transfer of the impurity. The calculation has been performed accordin... see more
V. H. Viktorov,V. V. Kravets,V. A. Kholoimov,Ye. V. Khrystian
The article represents practical studies on using the method of airlift for circulations of solution in chemical cleaning of the caldron DKVR-4/13 from scum and describes the main technological schemes of the method. The authors show that application of t... see more
S. V. Arpul
The paper suggests a technique of determination of coordinates of passenger electric locomotives marginal tractive characteristic for carrying out traction calculations in solving the problems of parameters optimization of tractive rolling stock’s n... see more
A. M. Afanasov
The paper suggests a technique of estimation of wheel flange wear in locomotive whealset skidding in negotiations of curves.
V. Ye. Vasyliev
For the analysis of stability of characteristics by the methods of probability theory and mathematical statistics, the paper suggests the forms for determination of expectancy and dispersion of speed and tractive force, with account of nonlinearity of fun... see more
V. Ye. Kazhan
The paper considers the «Polumarkovskaya» model of operation process and suggests an algorithm of electromechanical system reliability performances, based on the methods of statistic modeling.
M. M. Kedria,I. V. Chumak
A mathematical model of the traction drive of electric locomotive series DE1 has been built on the basis of a well-known methodology. The equations, the structural scheme of the motor as a non-linear regulation object, the time constants of structure unit... see more
A. I. Kiiko
The article represents some results of computer modelling of dynamic processes in the tractive drive of freight and passenger electric locomotives in realization of marginal friction forces and their interaction with anti-boxing system of boxing preventio... see more
D. V. Ustymenko
The authors suggest a system of automatic control of braking force at recuperation ofd.c.electric locomotives, in which the necessary braking effort is generated by the decisive unit, constructed on the basis of a microcontroller, according to the p... see more
T. M. Mishchenko
Theoretical research of voltage emissions has been conducted for the collector of electric locomotive DE1. The comparative results of theoretical and experimental calculations have been provided.
V. I. Borshchov,V. I. Klymov
Development of drainage defects, the defects of concrete coating, corrosion of the ferroconcrete rods and vatting of solution of railway span structures, made from conventional rod fixtures, due to ageing processes, have been analysed. The dependence has ... see more
V. I. Borshchov,K. I. Soldatov
The paper considers the main rules of determining the carrying capacity of ferroconcrete beam span structures ofrailway bridges on the basis of domestic normative document CP/0085.
Sh. Miliukas,L. P. Linhaitis,V. Podvezko
The article represents the research results of probabilistic evaluation of the effect of lubricators upon the wearout of wheelsets. The authors show dependence of the intensity of flange tear-out on the running distance. Received regression curves have be... see more
V. I. Kharlan
The article investigates the influence of plane, the longitudinal profile parameters and the kind of rolling stock on the level of maximal speed in introduction of high speed train services.
P. V. Bekh
The paper describes a method of the forecasting the container services within transport corridors.
A. A. Bosov
The article proposes fundamentals of a differential calculus of multitude functions.
A. A. Bosov,B. P. Pikh
Reduction of the running time of train on account of reconstruction of the track and the vehicles is considered as a problem of vector optimization. A technique of estimation of expenditures dependence on the saved running time of train has been proposed.
H. M. Kirpa,A. A. Bosov,I. P. Korzhenevych
The article considers a mathematical model of high-speed rail network of inUkraineand proposes a method of developing the rational options.
H. M. Kodola
On the basis of the method of e -orthogonalization, a technique of constructing mathematical models with a minimum error has been proposed under the test data, when the number of indices exceeds the number of tests.
S. V. Myamlin,Ye. O. Pysmennyi,O. I. Yalovyi,L. A. Manashkin
The article proposes mathematical description of interaction of two solid bodies, connected by an elastic tie. The proposed mathematical model of shock absorbers can be used in more complex mathematical models of spatial oscillations of railway vehicles.
V. H. Viktorov
The article proposes to arrange the equipment of control systems as separate functional blocks, each of which operates only one object. Proceeding from requirements to the control system as a whole and necessity of meeting the dependences, determined by t... see more
V. V. Lahuta,M. I. Kapitsa
The article considers prognostication of the stationary mode of the fleet of VL8 locomotives on the basis of Kolmogorov's equations of the mass service theory and optimization task, with the use of observation data.
G. Vaiciunas,L. P. Lingaitis
The paper deals with the effect of asymmetric character of the Lithuanian railroad freight traffic in western and eastern directions on the selection of optimal locomotive traction. On the basis of analysis of data on freight turnover in 1999, it has been... see more
O. M. Bondariev,T. O. Ryzhova,O. O. Bondariev
The paper provides the outcomes of theoretical calculations of vertical loading of wheelsets of two-axle locomotive bogies with the locomotive running on a stationary mode with a freight train. Evaluation is given to the influence of the slope angle of th... see more
V. L. Horobets
The article considers the methods of reproduction of vibrations, perceived by bearing structures of the rolling stock, in the course of stationary vibration tests.
M. O. Kostin,P. Ye. Mykhalichenko
The article describes a mathematical model and the results of the probabilistic experimental and theoretical research of the degree of wear of the inside surface of bearing rings and wheelset neck of the VL series electric locomotives. A new technology of... see more
A. P. Zubko,I. P. Korzhenevych,M. B. Kurhan,D. M. Kurhan
The authors have carried out an analysis and established the sphere of application of rolling stock with forced inclination of the car bodies.
B. Ya. Ostapiuk
Basing on the results of economic and theoretical calculations, and also the static outcomes of car examinations, the authors have considered and proposed several reasonable options of extending the term of passenger cars operation.
V. I. Bobrovskyi,M. V. Rohov
The authors have developed an iteration method of optimizing the train cuts braking modes on the sorting humps, which allows maximizing the intervals between the cuts on separating switches, and made a study of its efficiency.
V. S. Andrieiev,O. L. Tiutkin,T. O. Selikhova
The article considers the issues of mathematical modelling of behaviour the outside-of-the-centre loaded basements, resting on multi-layer beds. It has been shown that application of the finite elements method forcalculation of such basements allows to ge... see more
B. H. Klochko,S. O. Bychkov,V. O. Momot,A. A. Kushvid,D. V. Hrynko,V. V. Punahin
The article presents the results of experimental and theoretical studies, aimed at improvement of antisulphate stability of concrete in the structures, operated in conditions of a sulphate aggression. It has been shown that usage of a mathematical model o... see more
B. H. Klochko,S. O. Bychkov,V. V. Momot,D. V. Horidko,V. V. Punahin
The paper provides main definitions and technological principles of obtaining the composite materials, used in hydro-technical construction. Experimental data have been presented for steel-fiber-concretes, destined for preparation of monolithic coatings w... see more
V. P. Pochtar
The paper deals with one of the practical ways of determining the necessary volumes of preliminary works at the railway objects in the course of planning and organization of their technical cover. This issue has not been examined by Ukrainian authors befo... see more
?. M. Pshinko,M. V. Savytskyi,S. O. Koretska,O. O. Honcharenko
This article describes a conceptual approach to the organization of production and the manufacturing technology of thermo-insulating material «Heatisol», provides the basic data on the material and considers its advantages in comparison with conventional ... see more
O. M. Pshinko,A. V. Krasniuk,V. M. Punahin
The work provides analysis of the problems, connected with obtaining high-strength concretes for ring-like and tubular non-armatured constructions and shows a possibility of obtaining a material, capable of enduring significant pull tensions in applicatio... see more
A. V. Radkevych,I. D. Pavlov,F. I. Pavlov
Reconstruction of the objects, destined for different purposes, has always the same aim, i.e. execution of the woks within the set periods with the smallest possible costs. The practice of the reconstruction works, however, testifies that the timeframes a... see more
V. L. Siedin,V. D. Petrenko,O. L. Tiutkin
The article features a numerical analysis of influence of new design decisions in constructions of pylon stations. It has been concluded that introduction of any new elements in the construction of an underground structure requires a detailed analysis, be... see more
K. I. Soldatov,H. S. Zhelezniak,K. V. Hurzhii
The article is devoted to the possibility of replacement of complex inseparable irregular bridge structures by their regular counterparts, with minimal errors in definition of the own frequencies. The analysis has been performed on a real five-span bridge... see more
D. Yu. Chashyn
The aim of the work is improvement of methodical principles of organizational and technological preparation to construction of the transport object. In order to reach this goal, solutions of the set tasks are presented on the basis of modern achievements ... see more
Ye. O. Misiura
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V. Ye. Volkova
The object of the present study is one-mass vibro-percussion dampers. Hybrid modelling was chosen as the main testing method. The time processes, spectral characteristics and phase trajectories for dynamic dampers with the piecewise-and-linear elastic cha... see more
S. Sh. Aitov
The article analyses the issue of peculiarities and stages of development of economic theories about globalization processes.
V. I. Dziuba
A research has been proposed of permanent and variable portions of the factory costs in a transport enterprise, at their distribution in the general structure of expenditures.
N. V. Radionova
The article considers the issues and main directions of formation of an effective control system over the state corporate rights in present-day market economy conditions inUkraine.