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Transport Problems

Silesian University of Technology

Subject: Economics , Transportation , Transportation Science & Technology

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eISSN: 2300-861X

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FEATURED ARTICLES

SIMULATION OF THE ROUTE NETWORK AND FERRY TRAFFIC INTENSITY BASED ON THE PROCESS OF DISCRETIZATION AND CIRCOS PLOT INTENSITY DIAGRAM
DEVELOPMENT AND IMPLEMENTATION OF RETRO-REFLECTIVE ELEMENTS FOR AUTOMATIC ACCESSORIES AND PLACES OF PLANNED POINTS
ADAPTATION OF THE SERVQUAL METHOD FOR TESTING THE QUALITY OF PASSENGER AIR SERVICES
A Study of the Dynamic Parameters Influence over the Behavior of the Two-Section Articulated Vehicle during the Lane Change Manoeuvre

VOLUME 13 , ISSUE 2 (June 2018) - List of articles

SPEED MANAGEMENT EFFICACY ON NATIONAL ROADS – EARLY EXPERIENCES OF SECTIONAL SPEED SYSTEM FUNCTIONING IN PODLASKIE VOIVODSHIP

Robert Ziółkowski

Driving speed is one of the most important factors in road safety, and speed not only affects the severity of a but is also related to the risk of being involved in a crash. Inappropriate speed is responsible for more than a third of all fatal accidents occurring on the roads. In Poland, the problem of speeding drivers is widely common. Hence, effective speed management and enforcement of speed limits on the existing road an important role. Possible solutions for rural roads are very limited and(..)

DOI: 10.20858/tp.2018.13.2.1

GENERATING AND MODELING OF BRAKING CURVE AND THE ASSESSMENT OF THE QUALITY OF AUTOMATIC STOPPING OF THE TRAIN

Jan Anuszczyk/ Andrzej Gocek/ Krzysztof Pacholski/ Bartosz Dominikowski

This paper presents the theory about generating the braking curve and the analysis of the influence of the braking controller parameters on the generation of the braking curve of the train. In this paper, computed examples of braking quality developed using generic quality factor are shown, and on the basis of the calculations, weight components of the factor and an additional criterion for assessing the quality of braking were proposed. It has been demonstrated that the developed algorithms can(..)

DOI: 10.20858/tp.2018.13.2.2

DIFFERENT DEFUZZIFICATION METHODS IN GUIMBAL CABRI G2 HELICOPTER TAKEOFF POSSIBILITY EVALUATION

Marlena Mendrek/ Norbert Grzesik/ Aneta Krzyżak/ Konrad Kuźma

The article discusses the aerodynamic properties of the Guimbal Cabri G2 helicopter. The main considerations concern the helicopters ascending to the altitude under initial conditions, which were assumed in the project and how the change of the defuzzification method affects the work of the fuzzy controller. The authors analyzed the following: the aircraft, the crew and the payload. The authors assessed the altitude and the minimum time of the helicopter climb. In designing and the work simulati(..)

DOI: 10.20858/tp.2018.13.2.3

ECONOMIC–GEOGRAPHICAL METHOD DELIMITING WAGON FLOWS IN THE REGION CONSIDERED: MODEL AND ALGORITHM

Oleg Chislov/ Viktor Bogachev/ Vyacheslav Zadorozhniy/ Taras Bogachev

The problem of effective management of the railway freight flows in the conditions of the multiplicity of operators requires the rationalization of the transportation process. The further development of the authors’ research on creating the mathematical model of the railway freight flows in the region transportation and technological system is presented. For the first time, the theory of algebraic curves of higher orders is used to create a territorial model of the oligopolistic market of freigh(..)

DOI: 10.20858/tp.2018.13.2.4

ENERGY CONSUMPTION AND CARBON FOOTPRINT OF AN ELECTRIC VEHICLE AND A VEHICLE WITH AN INTERNAL COMBUSTION ENGINE

Robert Robert Muha/ Aleš Peroša

The use of electrically powered vehicles is becoming more and more established in practice and represents a promising solution in future ensuring quality mobility and reducing the pollution in the environment. Since these vehicles are high-priced, and there is still a low awareness among consumers in terms of energy consumption and pollution, vehicles with an internal combustion engine remain the norm. For this purpose, the study, here, provides an energy consumption estimate of an electric vehi(..)

DOI: 10.20858/tp.2018.13.2.5

DYNAMIC REGULATION OF THE PERCENTAGE COMPOSITION OF THE MIX DIESEL AND BIODIESEL FUEL

Orest Horbay/ Andrii Poliakov/ Mykola Hrechaniuk/ Inna Vishtak

The use of internal combustion engines increase environmental pollution and dependence on fossil fuels. The biodiesel fuel, which is renewable, more environment friendly, and cheaper, is a good alternative for diesel engines. The use of biodiesel fuel leads to a drop in diesel power and an increase in fuel consumption. To prevent these shortcomings, it is proposed to use dynamic regulation of the percentage composition of a mixture of diesel and biodiesel fuel. The modernization of diesel engine(..)

DOI: 10.20858/tp.2018.13.2.6

RESEARCH AND DEVELOPMENT OF AN ELECTRIC TRACTION DRIVE BASED ON A SWITCHED RELUCTANCE MOTOR

Serhii Buriakovskyi/ Artem Maslii/ Olga Pasko/ Ihor Denys

In the most developed countries, intensive studies are being carried out to utilize various types of electric machines such as synchronous motors with permanent magnets and traction motors with non-traditional magnetic systems on traction electric drives. Switched Reluctance Motors (SRM) are one of the most simple, reliable, and cost-efficient technology used in manufacture and operation. Its convenient traction performance, combined with the high overload capacity, makes its use promising for b(..)

DOI: 10.20858/tp.2018.13.2.7

BRAKING EFFICIENCY DETERMINED USING AN ACCELEROMETER IN THE ASPECT OF TECHNICAL CONDITION OF SHOCK ABSORBER

Łukasz Konieczny/ Rafał Burdzik/ Jan Warczek/ Robert Jaworski/ Bogusław Śleziak

This article presents results of tests of the effect exerted by technical condition of shock absorbers on the braking efficiency of an automotive vehicle. The tests were conducted using Fiat Seicento featuring front shock absorbers which enabled shock-absorbing fluid-level adjustment. The tests comprised measurements conducted on the shock absorbers in four states, i.e. the nominal state with the fluid level at 100%, with shock-absorbing fluid levels of 25%, 50% and 75% as well as with the fluid(..)

DOI: 10.20858/tp.2018.13.2.8

PREDICTION AND VALIDATION FOR THE AERODYNAMIC NOISE OF HIGH-SPEED TRAIN POWER CAR

Shi-jie Jiang/ Song Yang/ Dan Wu/ Bang-Chun Wen

The aerodynamic noise of high-speed train power car was investigated in this article. The full-scale power car was first modeled, and the external steady flow field was computed by a realizable k-ε turbulence model. The aerodynamic noise sources of the power car surface and the external transient flow field were then calculated by broadband noise source model and large eddy simulation (LES) model, respectively. The static pressures on the train surface were obtained from the results of the trans(..)

DOI: 10.20858/tp.2018.13.2.9

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

Andrey Andryushchenko/ Pavel Kolpahchyan/ Alexander Zarifyan Jr.

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 locomotive'(..)

DOI: 10.20858/tp.2018.13.2.10

INFLUENCE OF PRIMARY SILICON PRECIPITATES ON ANODIZED ALUMINUM ALLOYS SURFACE LAYER PROPERTIES

Krzysztof Labisz/ Jarosław Konieczny/ Łukasz Wierzbicki/ Janusz Ćwiek/ Anna Butor

In this work, we presented the influence of the anodizing method and parameters, as well as the chemical composition of the used aluminium alloys on the properties and microstructure of the anodic layer produced on aluminium alloys, in particular on the size and morphology of the primary silicon precipitates and the homogeneity of the resulting oxide coating. Aluminium alloys AlSi8 and AlSi12, produced using the die-casting method and subsequently subjected to anodic oxidation were used as test (..)

DOI: 10.20858/tp.2018.13.2.11

Published Online: 31-July-2018

TRANSPORTATION DEMAND MANAGEMENT AS A TOOL OF TRANSPORT POLICY

Ryszard Barcik/ Leszek Bylinko

This article presents the concept of transportation demand management (TDM) in the EU transport policy context. Authors present the source of transport intensity problems and also show good practices that effectively reduce the transport demand. To identify the major transportation demand problems that cities are faced with, primary and secondary research was carried out. Primary research shows the social awareness of mobility management. Secondary research consists of a thorough review of the e(..)

DOI: 10.20858/tp.2018.13.2.12

APPLICATION OF ANT-COLONY ALGORITHM TO THE ISSUE OF IMPROVING RECTIFIED VOLTAGE PARAMETERS IN ELECTRIC TRAM TRACTION

Barbara Kulesz/ Andrzej Sikora/ Adam Zielonka

In this paper, the problem related to transformation of ac voltage into DC voltage used in tram supply is considered. A variable component is always present in rectified voltage. Pulsation of rectified voltage is influenced by different factors. In a 12-pulse system, where two secondary transformer windings are used (one delta-connected and the other star-connected), an additional factor increasing the pulsation is the unbalance of the output voltages at these windings. Tap changer may be used a(..)

DOI: 10.20858/tp.2018.13.2.13

Published Online: 31-July-2018

RESEARCH OF TOKEN RING NETWORK OPTIONS IN AUTOMATION SYSTEM OF MARSHALLING YARD

Igor Zhukovyts'kyy/ Victoria Pakhomova

In the automation systems of sorting process the use of computer networks of Ethernet technology is possible. But its traditional drawback is a probabilistic nature of the network access, which does not guarantee the information transmission in specified time intervals. However, there are other technologies that are free from this defect, for example, the Token Ring technology. A methodology, for determination of the network parameters in the automation system on marshalling yard at the restrict(..)

DOI: 10.20858/tp.2018.13.2.14

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