52 articles in this issue
O. M. Bondaryev,A. I. Zhulai,O. O. Bondaryev
In the article the analysis of factors, which influence upon decentring values of axles of shafts of tractive engines and tractive gearheads of locomotives, is presented and the calculations to determine the conditions of allocation of mountings of tracti... see more
V. S. Dzhus,A. Ya. Kulichenko
In the article presented there are considered the mathematical expressions of requirements to safe deformation of buffer elements of wagons according to condition of the motion deceleration by shock with introduction into equation of constant quantities d... see more
S. V. Myamlin,V. V. Zhyzhko,V. I. Prykhodko,O. A. Shkabrov
In the paper the results of calculations on determination of strength features of springs in the spring suspension of passenger coach bogies and their dynamic characteristics with the account of requirements of normative documentation are presented.
S. V. Myamlin,A. S. Matsuk
The mathematical methods of calculation and analysis of patent fund enable estimation of progress of technical object trends. Using these methods, certain directions of development of biaxial bogie of freight carriage, in particular promising ones and dir... see more
V. I. Bobrovskyi,R. V. Vernihova,A. V. Kudryashov,L. O. Yelnikova
The operating limitations of braking modes for cuts on humps are explored; a procedure of construction of region of permissible speeds for exit of cuts from the retarding positions is developed.
V. V. Myamlin
Negative aspects of traditional production-and-conveyer lines for wagon repair are shown. Advantages of a new type of wagon-repair flow – asynchronous flexible one – are considered. An aggregative system is suggested as a mathematical model of functioning... see more
A. M. Afanasov
The possible variants of providing the mutual loading of electric machines of direct current are considered on principle.
D. S. Biluhin
The possibility of application of the modern power semiconductor keys is considered for realization of asynchronous method of control of voltage level for circuits of on-board feeding of electric locomotives.
O. I. Bondar,I. L. Bondar
In this work the generalized mathematical model of an electrical network of the electrified railway junction is proposed. An estimation of influence of static var compensators installation on electric power losses in a network is executed on the basis of ... see more
Yu. P. Goncharov,V. V. Zamaruev,V. V. Ivahno,R. I. Liubych,N. V. Panasenko
The structure of traction substation 3,2 kV DC power source is considered. It is shown that the output filter choke of traction substation with voltage added converter may be excluded. A dynamic model of voltage added converter is developed, its features,... see more
Yu. P. Goncharov,V. V. Zamaruev,V. V. Ivahno,N. V. Panasenko,V. V. Bozhko,P. D. Andryenko,I. I. Lahuta
The results of analytical research and computer design of the anomalous, steady-state and transitional modes related to the resonance in the input filter of voltage added converter based on IGBT with the PWM are presented. The ways of resonance removal by... see more
Yu. I. Zharkov,Yu. H. Semenov
The principles of construction and the structure of radio system for detecting damaged current collectors and glaze-ice regimes on arc breaking of current collection as well as the peculiarities of received radio signals and the basics of their identifica... see more
Ye. D. Kim,V. H. Sychenko,V. L. Kalmykov
On the base of numeric investigations on mathematical models of stationary electric field the basic electric performances of insulating suspensions from porcelain and polymeric insulators for contact nets of alternating and direct current are compared.
P. Yu. Krasovskyi
The analysis of the basic components of electric power losses in elements of the power supply system is carried out and their classification is proposed.
P. O. Loza
The methods of determination of equivalent load current in tests of electric locomotive traction engines without forced ventilation with use of the results of qualification test of engines of certain types are offered in the article.
O. O. Matusevych
The method of system approach for increasing the reliability of controlling equipment on traction electric supply system for electric transport is proposed. This approach is based on expert information that takes into account the importance of indices. Th... see more
Ye. P. Mesiats
The efficiency of compensation of capacitor currents of single-phase short circuit on ground corresponds to a resonant, or close to it, mode of adjustment of the compensating device. In the paper the critical analysis of the most widespread methods of aut... see more
A. M. Muha
In the article the structured schemes of steady-state converter are offered for traction drive of promising multisystem electric locomotives with traction engines of direct current and their comparative analysis is conducted.
N. V. Panasenko,Yu. P. Honcharov,V. V. Ivahno,O. Ye. Ivanov,V. N. Kozachok,P. P. Morozov
The structure of the insert of direct current on the traction substation, which makes it possible to remove a number of deficiencies in the acting feeding scheme of the overhead electric transport power line of alternating current, is proposed. Additional... see more
Yu. Ya. Sheika
On the basis of materials of scientists of Moscow and Petersburg State Universities of C Ways and NIIEFAENERGO Ltd.» the author of this article with additions has considered a practical possibility of us bipolar switches on three-phase connections of dist... see more
F. P. Shkarbets,O. V. Ostapchuk,A. M. Hrebeniuk
The control system of contact wire integrity and the element of signal selection by the supervision system and also its further tuning are considered.
I. P. Korzhenevych
The accuracy of survey of railway plan and the possibility of its increase are examined.
M. B. Kurhan,N. A. Muhina,O. S. Chernyshova
The mathematical model for prediction of change of running time and mechanical work of the locomotive traction force at occurrence of restrictions of the train traffic speed is suggested.
V. V. Rybkin,M. P. Nastechek,O. V. Hubar,V. S. Andrieiev
In the given article the analysis of dynamic characteristics of the railway track with fastenings ???-4 is presented.
M. M. Biliaiev,I. V. Kalashnikov,O. M. Lutsenko,Ye. Yu. Rats
A number of technical approaches to eliminate the contamination area in soil or ground waters were considered. Their advantages and disadvantages are also discussed.
Yu. V. Zelenko
The principles and peculiarities of conduction of elimination measures after emergency emissions of oil products are presented. The technologies of local cleaning of soils from oil products and their utilization are proposed.
P. B. Mashyhina
The 2D numerical model to simulate the pollutant dispersion over complex terrain was proposed. The model is based on the equation of potential flow and the equation of admixture transfer. Results of the numerical experiment are presented.
O. M. Pshinko,M. M. Biliaiev,O. Yu. Gunko
The 3D CFD model to simulate the pollutant transfer and the process of neutralization of toxic gas after accidents was developed. The model is based on the transport gradient model and the model of inviscid incompressible fluid. The results of numerical e... see more
O. V. Anufrieva,B. H. Klochko
The article is about the results of experimental-and-theoretical research of usefulness of mortar and concrete mixes for underwater repair works. It is shown that the developed compositions of hydraulic engineering concretes are characterized by high effe... see more
I. K. Badalakha
In the article it is proposed to divide the overall deformation of elastic medium on two independent components – pure and voluminous ones, which are subjected to different physical relationships and determined separately. A comparative analysis of the re... see more
D. O. Bannikov
In the paper two special theoretical problems as for working of stiffening ribs in steel capacity structures for granular materials are presented. The first problem is devoted to determination of degree of joint work of the wall together with the rib; the... see more
P. V. Bezditko,A. V. Krasnyuk,A. D. Malyi,N. P. Bocharova
This article describes the technology of modeling regular polyhedra by graphic methods. The authors came to the conclusion that in order to create solid models of regular polyhedra the method of extrusion is best to use.
N. I. Biloshitska
In the article the research results of influence of technological factors on properties and characteristics of the plastoconcretes under development for repair-reconstruction work are presented.
O. L. Herasymova
A complex criterion of estimation of efficiency of the management system by the construction projects is developed in the article. It assumes the choice of administrative decisions on the basis of data of project realization statistics and a middle risk o... see more
M. V. Drapaliuk
In the paper main points of technology of semi-dry forming of the ferroconcrete articles of hydraulic engineering purposes are presented. The semi-dry forming of the modified concrete mixes enables to avoid the heat treatment of articles due to the activa... see more
V. I. Kyrian,V. V. Knysh,H. O. Lynnyk
In the work the operating experience and methods of increasing the reliability and durability of steel bridges are investigated.
V. M. Pylypenko
In the article main points of developed technology of vibroimpact-pulse compaction of concrete mix for producing the pipes of sewage collectors are stated. It is shown that using the offered technology ensures the intensive growth of concrete strength at ... see more
O. S. Raspopov,O. O. Ruban,S. O. Chernyshenko
Exact analytical decisions are presented for free flexing vibrations of multiple-deck and multiple-bay regular frames taking into account inertia of rotation, shifts, and static longitudinal forces. Analogical results are obtained for the joint vibrations... see more
M. M. Rudenko,V. O. Doronina
In the article the analysis of efficiency of methods of maintenance of road concrete in a summer period of placing is presented. The technology of maintenance of fresh-placed road cement-concrete is related to the complex of measures aimed at obtaining th... see more
V. M. Shastun,A. I. Bjeghun,V. V. Kovalenko
In the article the issues of protection of build constructions from the action of water environment by means of use of hydrophobic composition ZhF-4 are considered.
A. A. Bosov,K. U. Jeliseenko,O. I. Kharchenko
The variant of prerequisites for mathematical problem of rational use of resources is offered. The economic integral indicator for railway stations is built.
P. F. Ghorbachov
In the paper, with the purpose of accounting a casual character of distribution of capacities of transport areas on labor movements in a matrix of correspondences, the interval concept of modeling the population needs in movements has been suggested when ... see more
V. S. Naumov
The basic technological operations of the automobile freight forwarding process have been determined. The base algorithms of the freight forwarding technological process have been proposed. The fundamental flow charts of technological process in use have ... see more
I. O. Vakulenko
In the article the research results of mathematical description of curve of cyclic loading of carbon steel are presented.
M. A. Grischenko
In the article the research results of arising defects of metal on the tread contact surface of railway wheels are presented.
V. O. Zabludovskyi,O. M. Gulytsev,V. V. Dudkina
Electrochemical and gravimetric methods are used in order to research the influence of high overvoltages during electroplating on corrosive and electrochemical behavior of amorphous Co-P films, which were made using deposition from water solution of an el... see more
I. Ye. Kramar,S. O. Yakovliev
In this work the authors have conducted an analysis of the state of equipment of our enterprises. It is shown that in conditions of shortage of investments and disintegration of machine-building industry not the repair as proven mean of renewal of funds b... see more
V. Yu. Bozhanova,V. A. Razumova
In the article the main modern progress of the housing market trends are considered. The calculations of coefficient of housing price to income ratio for the population of Dnipropetrovs’k region are produced. The results of these calculations are analyzed... see more
Yu. V. Bulhakova,H. S. Piatyhorets
The proposals to determine the optimal order of realization of restructuration of Ukrainian railway transport in conditions of the world financial crisis was elaborated in this article.
V. V. Kompaniiets
In the article the principles of high-quality economic education are formulated; the results of introduction into the economic education of special courses, which take into account spiritual-and-moral, socio-cultural, innovativeintellectual constituents, ... see more
N. V. Myroshnyk
The concept «finance» is defined. It is investigated that in conditions of the market economy for effective management of financial resources the provision of enterprise activities with optimal amount of the financial resources, their rational use, the pr... see more
M. I. Mishchenko
The operational expenses of the railway transport infrastructure and their dependence on the basic railway indices in modern condition are under investigation.