Gintautas Bureika

Bio: Gintautas Bureika is an academic researcher from Vilnius Gediminas Technical University. The author has contributed to research in topics: Track (rail transport) & Train. The author has an hindex of 10, co-authored 67 publications receiving 349 citations.

An analytical mathematical method for calculation of the dynamic wheel-rail impact force caused by wheel flat

Abstract: The simplified method to determine a vertical impact force of wheel with flat and rail interaction is presented in this article. The presented simplified method can be used to identify maximum contact force and its distribution in the contact length between the damaged wheel and the rail. The vertical impact force depends on geometrical parameters of the rail and wheel with flat, speed of vehicle and the angle of deviation of rail. This article demonstrates the influence of wheel with flat geometrical parameters, speed of vehicle to maximum contact force and its distribution in the contact zone. The obtained values of the simplified method for determination of a vertical contact force are compared with the results obtained from field measurements.

Determination of the dynamic characteristics of freight wagons with various bogie

Abstract: In most cases, dynamic characteristics determine the wagon maintenance cycle, traffic safety, reliability and durability performance. The main dynamic indicators include the vertical Kvd and horizontal Khd dynamic coefficients as well as the stability coefficient Ks, which determines the wheel flange resistance to derailment. The article compares dynamic indications for three different types of bogies. There were no tangible differences observed for all the three different types of bogies running at a speed of 40 to 120 km/h on a direct tangent rail section. Nevertheless, there is a realistic potential to improve the dynamic indicators of a freight wagon by rationalising suspension unit parameters.

Modelling the assessment of traffic risk at level crossings of Lithuanian railways

Abstract: The article discusses the problem of railway safety management and the criteria for evaluating the traffic risk described in various scientific publications. The research aims to assess the risk posed to railway infrastructure objects and to create a model for safety risk evaluation. The research on the traffic safety risk with respect to the infrastructure of the rail transport system was divided into three stages. The Plan–Do–Check–Act (PDCA) model can be used for investigating the problem of managing railway traffic safety risks in the Lithuanian railways. The main threats to railway infrastructure objects are defined, and the catalogue of technical parameters of level crossings of the Lithuanian railways is presented. The maximum allowable train speed, the intensity of railway and road traffic, as well as the size (width) and visibility of level crossings from the train driver’s cab are chosen as the main criteria for evaluating the vulnerability of a level crossing. The logistic regression me...

Applying analytic hierarchy process to assess traffic safety risk of railway infrastructure

Abstract: Traffic safety is one of the main problems facing road and railway operators in many countries of the world.Traffic safety situation in Lithuania, despite the progress made in 2008, is still not good enough compared to the other European Union countries. The effective control and management of railway traffic, ensuring its safety, requires a comprehensive analysis of the state of the railway infrastructure objects and systemization of the obtained data. This would help to develop the effective urgent measures to considerably reduce railway traffic safety risks [1]. Thecomponentof railway infrastructure, causing many problems, associated with the collisions of trains with road vehicles and human injuries and mortalities, is level crossing. A comprehensive analysis of level crossings was performed for the period of several years (2003-2011) in Australia and the risk evaluation model ALCAM was suggested, and practically implemented by its governmental institutions. The experts from Great Britain also pay great attention to increasing traffic safety at railway level crossings with the help of the developed traffic safety control model ALCRM [10]. The Safety Risk Model (SRM), which presents quantitative investigation of the potential accidents resulting from the operation and maintenance of the Great Britain rail network is widely applied too [12]. SRM comprises a total of 120 individual models, each representing a type of hazardous event. Other railway infrastructure components, causing problems to specialists dealing with the problems of railway traffic safety in the Baltic States, Poland and Finland, are railway stations, freight terminals and their sortingtrack yards, pipelines [4, 18, 20]. Railway traffic safety control is aimed at protecting people, their health and wealth, as well as improving traffic conditions, reducing harmful effect of rail transport on the environment and ensuring the realization of the general aims, associated with railway traffic safety and the relationship between railway systems of various countries. The control of railway traffic safety is regulated in Lithuania by the Lithuanian Law on Railway Traffic Safety. This law defines the rights and responsibilities of the state institutions, developing and implementing the policy of railway traffic safety, as well as the requireBUREIKA G, BEKINTIS G, LIUDVINAVIČIUS L, VAIČIŪNAS G. Applying analytic hierarchy process to assess traffic safety riskof railway infrastructure. Eksploatacja i Niezawodnosc – Maintenance and Reliability 2013; 15 (4): 376–383.

Industrial decarbonization via hydrogen: A critical and systematic review of developments, socio-technical systems and policy options

Abstract: Industrial decarbonization is a daunting challenge given the relative lack of low-carbon options available for “hard to decarbonize” industries such as iron and steel, cement, and chemicals. Hydrogen, however, offers one potential solution to this dilemma given that is an abundant and energy dense fuel capable of not just meeting industrial energy requirements, but also providing long-duration energy storage. Despite the abundance and potential of hydrogen, isolating it and utilizing it for industrial decarbonization remains logistically challenging and is, in many cases, expensive. Industrial utilization of hydrogen is currently dominated by oil refining and chemical production with nearly all of the hydrogen used in these applications coming from fossil fuels. The generation of low-carbon or zero-carbon hydrogen for industrial applications requires new modes of hydrogen production that either intrinsically produce no carbon emissions or are combined with carbon capture technologies. This review takes a sociotechnical perspective to examine the full range of industries and industrial processes for which hydrogen can support decarbonization and the technical, economic, social and political factors that will impact hydrogen adoption.

The Selection of Wagons for the Internal Transport of a Logistics Company: A Novel Approach Based on Rough BWM and Rough SAW Methods

Abstract: The rationalization of logistics activities and processes is very important in the business and efficiency of every company. In this respect, transportation as a subsystem of logistics, whether internal or external, is potentially a huge area for achieving significant savings. In this paper, the emphasis is placed upon the internal transport logistics of a paper manufacturing company. It is necessary to rationalize the movement of vehicles in the company’s internal transport, that is, for the majority of the transport to be transferred to rail transport, because the company already has an industrial track installed in its premises. To do this, it is necessary to purchase at least two used wagons. The problem is formulated as a multi-criteria decision model with eight criteria and eight alternatives. The paper presents a new approach based on a combination of the Simple Additive Weighting (SAW) method and rough numbers, which is used for ranking the potential solutions and selecting the most suitable one. The rough Best–Worst Method (BWM) was used to determine the weight values of the criteria. The results obtained using a combination of these two methods in their rough form were verified by means of a sensitivity analysis consisting of a change in the weight criteria and comparison with the following methods in their conventional and rough forms: the Analytic Hierarchy Process (AHP), Technique for Ordering Preference by Similarity to Ideal Solution (TOPSIS) and MultiAttributive Border Approximation area Comparison (MABAC). The results show very high stability of the model and ranks that are the same or similar in different scenarios.

The use of AHP and rank correlation methods for determining the significance of the interaction between the elements of a transport system having a strong influence on traffic safety

Abstract: A system of road transport involves vehicles, roads, traffic participants and freight that therefore closely interact. The interaction between these material elements takes place in an external environment. The process of transportation is aimed at achieving some positive results, which could increase the efficiency of the Transport System (TS). However, negative effects such as a high accident rate cannot be avoided. The road accident rate is determined by the properties of the material elements of the TS and the parameters of their interaction. Their impact on the traffic accident rate cannot be determined by a planned experiment. They also cannot be compared quantitatively, because their units of measurement are different. The paper presents a detailed description of nine types of the interaction between TS elements belonging to three various levels. The data was given to 16 transport engineering specialists as a questionnaire for expert evaluation. The paper offers a logical control methodology for fi...

The criteria for identifying the quality of passengers’ transportation by railway and their ranking using AHP method

Abstract: Passengers’ transportation by rail involving various interested groups, such as managers, service staff and passengers, is a complicated process. Decision‐making persons, organizing railway trips should take into account the interests, needs and possibilities of these particular groups. The solution to some problems associated with passengers’ transportation by rail depends on the experience and qualification of decision‐makers, people who are responsible for the effectiveness of this work. To increase the quality of railway trips, the interested parties, groups of people mentioned above, should coordinate their actions, cooperate with each other in solving the problems and exchange relevant information. Therefore, the increasing quality of passenger transportation is a complicated issue, requiring good professional skills based on knowledge, practical experience, high intellect and new ideas of all the people involved in this process. The current paper presents a diagram showing passenger's tran...