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  • Transport Problems

 

Research Article | 27-February-2017

IMPROVEMENT OF WORKING CONDITIONS OF THE FREIGHT LOCOMOTIVE RUNNING GEAR

Summary. To improve the working conditions of the electric locomotive running part, it is necessary to decrease unsprung masses, lateral loads and the angle of attack and provide the third body with proper tribotechnical properties. A new scheme of the freight electric locomotive running gear is elaborated in the work, which ensures a decrease of unsprung masses, relative sliding of a wheel on the rail and an angle of attack that provides resistance to the destruction of the third body in the

George TUMANISHVILI, Tamaz NATRIASHVILI, Givi GOLETIANI, Victor ZVIADAURI, Tengiz NADIRADZE

Transport Problems, Volume 11 , ISSUE 3, 103–109

Article | 31-July-2018

REDUCTION OF ELECTRIC LOCOMOTIVE'S ENERGY CONSUMPTION BY SCALABLE TRACTIVE POWER CONTROL

At the beginning of the paper, the analysis of energy efficiency indicators for freight electric locomotive with asynchronous traction drive feeding from AC network under various operating conditions including when working with trains of various masses is made. The movement on different railway sections is considered. The graphs of locomotive’s speed, traction force, consumed power, and power for the traction obtained by on-board recorder are shown. In addition, the dependence of the

Andrey Andryushchenko, Pavel Kolpahchyan, Alexander Zarifyan Jr.

Transport Problems, Volume 13 , ISSUE 2, 103–110

Research Article | 21-April-2017

RESEARCH OF IMPACT OF THE LOADING ON ENDURANCE OF THE FREIGHT LOCOMOTIVE ENGINES

The publication reflects the research results of the rationalization of the rolling stock use of JSC LG Lithuanian railways to increase the reliability indicators of the freight diesel locomotive exploitation reliability. The comparative evaluation of the exploited freight diesel locomotive work duration, according to the technical documentation, by using comparative test results and indirect diesel reliability criteria approved in practice. An algorithm of work duration forecasting methodology

Sergejus LEBEDEVAS, Galina LEBEDEVA, Stasys DAILYDKA, Gediminas VAIČIŪNAS

Transport Problems, Volume 10 , ISSUE 4, 45–55

Article | 05-September-2020

POWER FLOWS IN A HYDROSTATIC-MECHANICAL TRANSMISSION OF A MINING LOCOMOTIVE DURING THE BRAKING PROCESS

This paper considers the braking process of a mine diesel locomotive with hydrostatic mechanical transmission (HSMT) operating according to the “input differential” scheme. Braking process modeling involves four implementation methods. Identification and systematization of basic regularities in the distribution of power flows within a closed transmission contour in the process of braking have been performed with the help of software support developed by means of MatLab/Simulink. The

Vadym SAMORODOV, Anatoliy BONDARENKO, Igor TARAN, Iryna KLYMENKO

Transport Problems, Volume 15 , ISSUE 3, 17–28

Article | 05-September-2020

INCREASING THE RESOURCE OF MILLING CUTTERS USED TO PROCESS THE LOCOMOTIVE WHEELSETS. PART 2: STUDY OF STRESSED-DEFORMED STATE

The article deals with the stress-strain state of the cutters used in the mills of a new design for the restoration of the working surfaces of locomotive wheels. A comparative analysis of stresses in the cutters was carried out using the finite element method, which showed a significant advantage of the new technical solution, the novelty of which is confirmed by the patent.

Aleksander SŁADKOWSKI, Yuriy PROYDAK, Vladislav RUBAN

Transport Problems, Volume 15 , ISSUE 3, 139–151

Research Article | 21-April-2017

Assessing steam locomotive dynamics and running safety by computer simulation

Steam locomotives are preserved on heritage railways and also occasionally used on mainline heritage trips, but since they are only partially balanced reciprocating piston engines, damage is made to the railway track by dynamic impact, also known as hammer blow. While causing a faster deterioration to the track on heritage railways, the steam locomotive may also cause deterioration to busy mainline tracks or tracks used by high speed trains. This raises the question whether heritage operations

Dāvis BUŠS

Transport Problems, Volume 10 , ISSUE SE, 15–27

Article | 18-March-2018

ANALYSIS OF HYDROSTATIC MECHANICAL TRANSMISSION EFFICIENCY IN THE PROCESS OF WHEELED VEHICLE BRAKING

To analyze the braking process of a mine diesel locomotive with hydrostatic- mechanical transmission (HSMT), a mathematical model has been developed. In contrast to available models, this one takes into consideration rules of changes in controlling the parameters of hydrostatic drive (HSD) and implementation methods for the braking process. Moreover, the model makes it possible to study changes in kinematic parameters, power parameters, and energy parameters of HSMT under various conditions of

Igor TARAN, Iryna KLYMENKO

Transport Problems, Volume 12 , ISSUE SE, 45–56

Article | 25-November-2017

MODEL TO CALCULATE THE OPTIMAL MODE OF TRAIN LOCOMOTIVES TURNOVER

Summary. A model to calculate the optimal work modes of train locomotives while serving train flows is proposed. The model is a further development of the dynamic transportation problem. Parameters of train movement and locomotive utilization are published. Both locomotive turnover and train schedules are produced. Useful utilization of locomotives increases from 70% to 90–95%. This allows the reduction of several thousands of train locomotives.

Petr KOZLOV, Sergey VAKULENKO, Nikolay TUSHIN, Elena TIMUKHINA

Transport Problems, Volume 12 , ISSUE 3, 125–133

Article | 24-December-2021

CAPACITY UTILIZATION LEVEL OF FREIGHT ELECTRIC LOCOMOTIVES AND EVALUATION OF EXPENSE REDUCTION ON CONSUMED ENERGY DUE TO MODERNIZATION

The working conditions of freight electric locomotives with full-weight and empty-weight trains are analyzed. It is shown that due to the use of scalable traction power control technology (discrete-adaptive control algorithm), there is a possibility for more complete use of electric locomotive capacity and, accordingly, a significant increase in its energy efficiency. The main condition for the realization of this possibility is the presence of an individual per-axle traction control system

Alexandre ZARIFYAN, Adel MUSTAFIN, Elena VALENTSEVA, Alexandre SHAPSHAL

Transport Problems, Volume 16 , ISSUE 4, 5–14

Article | 23-March-2018

COORDINATION OF LOCOMOTIVES TURNOVER AND SERVICING MODES

A coordinated calculation of two processes – locomotives turnover and servicing – is described. Locomotives turnover is calculated by optimization system Labyrinth and servicing by dynamic transportation problem. Service programs integrate these processes. A model of coordinated arrival of locomotives at servicing stations is proposed. The calculation consists of three interrelated steps. The first step is the calculation of the optimal locomotive turnover without considering

Petr KOZLOV, Elena TIMUKHINA, Nikolay TUSHIN

Transport Problems, Volume 13 , ISSUE 1, 19–26

Research Article | 21-April-2017

Study of the asynchronous traction drive's operating modes by computer simulation. Part 1: Problem formulation and computer model

at the realization of various control algorithms must be obtained. Another objective is to research the dynamic processes in various modes of the electric locomotive operation (start and acceleration, traction regime, coasting movement, wheel-slide protection, etc). To solve these problems, a complex computer model based on the representation of AC traction drive as controlled electromechanical system, is developed in Part 1. The description of methods applied in modeling of traction drive

Pavel KOLPAHCHYAN, Alexander ZARIFYAN Jr

Transport Problems, Volume 10 , ISSUE 2, 125–136

Research Article | 30-March-2017

PASSIVE SAFETY OF HIGH-SPEED PASSENGER TRAINS AT ACCIDENT COLLISIONS ON 1520 MM GAUGE RAILWAYS

Summary. The fundamental principles of the passive protection concept of high-speed passenger trains at accident collisions on 1520 mm gauge railways have been developed. The scientific methodology and mathematical models for the analysis of plastic deformation of cab frame elements and energy-absorbing devices (EAD) at an impact have been developed. The cab frame and EAD for a new-generation locomotive have been designed. The EAD prototype crash test has been carried out.

Maryna SOBOLEVSKA, Igor TELYCHKO

Transport Problems, Volume 12 , ISSUE 1, 51–62

Research Article | 21-April-2017

Study of the asynchronous traction drive's operating modes by computer simulation. Part 2: simulation results and analysis

. The description of methods applied in modeling of traction drive elements (traction motors, power converters, control systems), as well as of mechanical part and of "wheel-rail" contact, was given. In Part 2, the results of dynamic electromechanical processes modeling in various modes of electric locomotive operation (start and acceleration, traction regime in straight and curve railway sections, wheel-slide protection, etc.) are presented. In perspective, based on the developed model, the

Pavel KOLPAHCHYAN, Alexander ZARIFYAN Jr

Transport Problems, Volume 10 , ISSUE 3, 5–15

Article | 15-March-2021

ASSESSMENT OF THE INFLUENCE OF PREVENTIVE MAINTENANCE ON THE RELIABILITY AND AVAILABILITY INDEXES OF DIESEL LOCOMOTIVES

the rail vehicle that affect the downtime and mean availability most significantly. Specialized software including Weibull++, BlockSim, and MiniTab aided calculations were used to illustrate the application of the results of a modernization project involving a 6Dg diesel locomotive, carried out in cooperation with the biggest Polish rail carrier. The applicability of the proposed tools has been verified on the example of a selected sample of 75 diesel locomotives employing data on their use and

Maciej SZKODA, Grzegorz KACZOR, Robert PILCH, Maksymilian SMOLNIK, Zbigniew KONIECZEK

Transport Problems, Volume 16 , ISSUE 1, 5–18

Article | 03-October-2018

INCREASING THE RESOURCE OF MILLING CUTTERS USED TO PROCESS THE LOCOMOTIVE WHEELSETS. PART 1: DETERMINATION OF CUTTING FORCES

Aleksander SKŁADKOWSKI, Yuriy PROYDAK, Vladislav RUBAN

Transport Problems, Volume 13 , ISSUE 3, 119–130

Research Article | 02-February-2017

NEW POSSIBILITIES OF RAILWAY TRAFFIC CONTROL SYSTEMS

Summary. This article analyses the train traffic control systems in 1435 mm and 1520 mm gauge railways. The article analyses the aspects of train traffic control and locomotive energy saving by using the coordinates of track profile change that have been received from GPS. In the article, achievements of Lithuanian railways (LG) in the area of train traffic control optimisation are presented.

Lionginas LIUDVINAVIČIUS, Aleksander SŁADKOWSKI

Transport Problems, Volume 11 , ISSUE 2, 133–142

Research Article | 14-February-2019

COMPRESSED AIR QUALITY INCREASE FOR ROLLING STOCK PNEUMATIC SYSTEMS BASED ON ENERGY EFFICIENCY

rolling stock compressed air preparation, the authors suggest performing factor analysis influencing on compressed air purification method choice to consider pneumatic system as a module scheme and to employ the modernized construction of the locomotive main tanks.

Tatiana RIPOL-SARAGOSI, Leonid RIPOL-SARAGOSI, Igor SMYCHOK

Transport Problems, Volume 13 , ISSUE 4, 13–21

research-article | 23-April-2019

ELECTROMAGNETIC SYSTEM FOR IMPROVING THE ADHESION OF WHEELS TO RAILS

of wheels and damage to the wheels and rails [5]. The presence of a third body between wheel and rail significantly affects the adhesion. Poor adhesion of the wheels to rails can cause various problems, such as high-frequency noise [6], fatigue of the contact surface [7], increased corrugation of rails [8], energy dissipation [9], unstable adhesion before acceleration [10], and poor braking performance [11]. Traditionally, sand is used to increase the coefficient of adhesion of locomotive wheels

Yuriy OSENIN, Lidiya ANTOSHKINA, Igor SOSNOV, Evgeniy SHAPRAN, Aleksei CHESNOKOV

Transport Problems, Volume 14 , ISSUE 1, 59–67

Article | 25-March-2018

IMPROVING METROLOGICAL PROPERTIES OF ELECTRIC TRACTION ENERGY METERS USING FUZZY CONTROLLERS

designed for smart and continuous modification of the conversion factor of the low-voltage input part of the current channel in the electric energy meter. The authors have performed an accurate analysis of the current function in the main circuit of an electric locomotive by creating a model of a traction inverter subject to asynchronous motor load. An essential concept is this paper is to present the possibility of having a multi-input fuzzy controller split into two-input controllers connected in

Bartosz DOMINIKOWSKI, Krzysztof PACHOLSKI, Jan ANUSZCZYK, Andrzej GOCEK

Transport Problems, Volume 13 , ISSUE 1, 147–158

Article | 01-December-2015

STANDARD ARPU CALCULATION IMPROVEMENT USING ARTIFICIAL INTELLIGENT TECHNIQUES

Recognizing how developing browsing behaviour could result in greater return for service providers through more efficient data usage without compromising Quality of Service (QoS), this paper proposes a new innovative model to describe the distribution and occurrence of behavioural errors in data usage models. We suggest: a) that the statistics of behavioural errors can be described in terms of locomotive inefficiencies, which increases error probability depending on the time elapsed since the

Soorena Merat, P.Eng, Dr. Wahab Almuhtadi, P.Eng.

International Journal on Smart Sensing and Intelligent Systems, Volume 8 , ISSUE 4, 1917–1934

Research Article | 02-February-2017

The Determination of Admissible Speed of Locomotives on the Railway Tracks of the Republic of Kazakhstan

Seidulla ABDULLAYEV, Natalyа TOKMURZINA, Gabit BAKYT

Transport Problems, Volume 11 , ISSUE 1, 61–68

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