Vojkan Lucanin

• University of Belgrade

Digital transformation of business activities has outgrown from competitive advantage to necessity in recent years. Evolution of information and communication technologies (ICT) has created the world where electronic business (E-Business), document management systems (DMS) and enterprise resource planning (ERP) solutions have become standard, even...

This paper analyzes and compares the noise measurement results of rail vehicles obtained by testing with one or two identical trailer units. The test procedure for measurement of the pass-by noise emitted by railway vehicles is generally carried out using the standard method according to ISO 3095, for which it is necessary to perform the measuremen...

Draw hook failures present significant problems for railway safety and operational efficiency. Although failures on the draw gear are not frequent, they can induce serious problems on the vehicles and infrastructure when some elements break. This paper presents comprehensive research on the potential causes of these failures, aiming to provide insi...

For many years, methods for assessment the safety against derailment of railway vehicles have been developed and improved. Possible approaches to solve this task are conducting real in-situ measurements or the application of MBS simulations. The goal of both approaches is to reliably determine the lateral Y and vertical Q forces and their Y/Q ratio...

A multidisciplinary research method was employed with the intention to create a series of bio-inspired flattened airfoils, observe their aerodynamic characteristics, and analyse their applicability to small devices or to designs of high-speed trains, within the shortest period in the conceptual stage. A research specimen of a kingfisher, selected f...

Implementation of collision energy absorber in bearing structure of the current railway vehicles presents a big engineering challenge. A main challenge is to develop compact absorber suitable for installation in a very limited space at the front beam. Beside to compact dimensions, designer has a task to create absorber with required absorption powe...

In the times of significant development of high-speed train transportation and taking the primacy over the others, one of the major designing tasks is to predict accurately and fast the vehicle’s main performances, especially aerodynamics. Motivated by the bionic design of representative Japan’s train Shinkansen, the presented bionic design was bas...

Tendencies to increase the speed in the railway transport lead to intensive work on active and passive safety improvement of railway vehicles with the aim to reduce possibilities of collision to a minimum. Frequently, we have collisions in the main railway stations during shunting and forming trains at speed higher than allowed. Consequences of the...

This paper analyzes the work of the Committee for Accreditation of Scientific and Research Organizations in the Republic of Serbia. The paper includes different knowledge’s and many years of professional experiences of authors who are also members of the Accreditation Committee. In their introductory remarks, the authors generally state their views...

This paper shows some of the passenger difficulties when boarding trains. Overview of platform heights is discussed in accordance with international railway regulation. An overview of platform heights at Serbian railway lines and floor heights of passenger coaches, diesel units and electric multiple units for suburban and regional railway transport...

The angle of attack is an important wheel-rail contact parameter. Together with wheel-rail contact forces it serves for estimation of the rail vehicle curving performances. This paper analyses measurement uncertainty of the specially designed laser system for measurements of the wheel-rail angle of attack, with emphasis on the importance of the the...

Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design...

One of the main assemblies in the front part of the rail vehicle structures are passive safety elements. Perennial researches in the field of passive safety produced several different types of collision energy absorbers. Subject of this paper is review of experimental characteristics of a few different types of energy absorbers that works on the pr...

Angle of attack is an important wheel-rail contact parameter. It serves for estimation of the rolling stock curving performance. Together with wheel-rail contact forces, angle of attack influences the wear index. This paper presents experimental on-track measurements of the angle of attack using a specially designed laser device installed on track....

Increased advantages of railway transportation systems over other types of transportation systems in the past sixty years have been a result of an intensive development of the new generations of high-speed trains. Not only do these types of trains comply with the need for increased speed of transportation and make the duration of the journey shorte...

This paper researches a type of absorber of kinetic collision energy that works on the principle of shrinking and splitting a tube of circular cross section. During collision, a seamless tube is thrust through a cone bush, squeezing the tube. Energy is absorbed by the plastic deformation, and through the friction between the tube and the bush. Afte...

Crash energy absorber represents one of the main and necessary elements of body structure of modern railway vehicles. Intensive research in the field of passive safety produced more different types of collision energy absorbers using different shapes of deformations to absorb as much kinetic collision energy as possible. Different combinations of t...

Development of elements for absorption of collision energy of railway vehicles represent an important segment in the design of new and restoration of existing railway passenger coaches. Absorption elements are part of passive protection measures used railway vehicles. Passive protection role is achieved when crash repercussions during impact are mi...

This work presents the research results of the aerodynamic brake influence, mounted on the high-speed train's roof, on the flow field and overall braking force. The train consists of two locomotives at each end and four passenger cars between, with 121m of overall length. Aerodynamic brakes are designed to generate braking force by means of increas...

The system for assessment of the wheel-rail contact forces can be used for multiple purposes, among them for estimation of the train running safety, for train axle load measuring or wheel flats detection, as well as for the other research analyses. As the wheel-rail rolling contact moves along the track during train motion, it is very difficult to...

Development of passive safety elements is a key component in the design and manufacture of railway vehicles. Proper functioning of these elements is of great importance and has a direct influence on the safety of passengers, goods and vehicles. Different types of railway vehicles require absorption elements of different geometries and absorption po...

Development of passive safety elements is a key component in the design and manufacture of railway vehicles. Proper functioning of these elements is of great importance and has a direct influence on the safety of passengers, goods and vehicles. Different types of railway vehicles require absorption elements of different geometries and absorption po...

Wheels and rails provide guidance of a rail vehicle on a track. For that reason wheels and rails have dominant influence on safety against derailment and running performance of a railway vehicle. The wheel and the rail profiles also have significant influence on the wheel/rail wear, surface damage, forces in the contact between wheel and rail, trac...

This paper presents the results of research on the influence of an air wave, caused by a passing train on a person standing on the station platform. The tests were conducted in a real environment, at a railroad, on a doll and in a subsonic wind tunnel, on a 1 : 20 scale model of a high speed passenger train. Also, simulations of airflow, induced un...

Problem: The number of killed and injured persons in incidents at railway level crossings is generally increasing on the Serbian Railways, particularly at passive crossings. In this paper we researched the direct behaviour of road traffic participants at a conventional railway passive crossing. Method: Direct observational study of drivers' behavio...

Development of collision energy absorbers is one of the necessary measures for passive safety of passenger coaches. The purpose of passive safety is to minimize the collision consequences for passengers. The collision absorber developed in this work consisted of a low carbon seamless steel tube and conical bush fabricated from quench and tempered c...

The subject of this paper is experimental researches and numerical simulations of combined collision energy absorber. The mentioned elements are parts of passive safety measures of railway vehicles. This type of absorbers works on the principle of deformation using shrinking and folding process of the tubes. The idea was to use process of shrinking...

The subject of this paper isexperimental investigation of characteristics of combined tube energy absorber. The mentioned elements are a part of passive protection measures of railway vehicles. This type of absorbers workson the principle of deformation using shrinking and folding.The idea was to use process of shrinking and folding of the tube ina...

This paper presents the results of simulations, carried out with the Fluent software, for a high speed train moving at 70 m/s for 4 cases: the train configuration without aerodynamic brakes, the train configuration with one aerodynamic brake, with two, and with three aerodynamic brakes deployed over the roof of the train. We have determined the bra...

The subject of this paper is development of a numerical model and dynamic investigations of collision energy absorber of passenger wagons. The mentioned elements are parts of passive protection measures of railway vehicles. Absorber works on the principle of compressing the tube into a special bush with cone end. Energy absorption occurs by: elasti...

In this paper an analysis of possible causes of crack occurrence on reconstructed diesel multiple units (DMU) exploited on sideline in Serbia was performed. Analyzed DMU were designed in the sixties of the last century in accordance with standards and UIC regulations of that time. During exploitation cracks appeared on the frame of the running bogi...

This paper presents the aerodynamical brake system, as second brake system, in cases when it is necessary to speed down the train or at emergency situations when primary brake system Is out of order. In this brake system, braking force is a result of aerodynamical drag generated on pulled-up aerodinamical brake panels. These panels are especially e...

The subject of this paper is dynamic investigations of the characteristics of collision energy absorbers of passenger coaches. The mentioned elements are part of passive protection measures of railway vehicles. Absorber working on the principle of tube compression into a special bushing with cone end. The absorber’s role is to absorb as much of the...

The experimental characterization of the three types of elements for collision energy absorption of railway coaches that operates on tube crushing, expansion, and compaction principles have been described. The first type of absorber belongs to the tubes with a square cross-section on which the kinetic energy is transferred at the moment of impact....

The subject of this paper is research of the characteristics of shock absorbers of collision energy of passenger trains operating on the principle of tube compression into a special cone-like ring with a reduced diameter [1]. The absorber’s role is to absorb as much of the collision kinetic energy as possible by controlled deformation, in order to...

Low-adhesion (i.e., low-friction) problems continue to plague the modern railway, particularly in autumn when leaves on the line and damp conditions combine to form a low-adhesion contaminant film on the railhead. Sudden drops in adhesion can cause havoc with timetables, and can lead to accidents electrical insulation by contaminants can cause prob...

Development of shock absorbers is one of the necessary measures for passive protection of passenger coaches. The purpose of passive protection is to minimize the collision consequences for passengers. Present solutions are based on the use of elements with a special structure that absorb a large amount of collision kinetic energy through controlled...

Measures for passive safety of railway vehicles in collision were analysed in this paper. A short review of safety measures of frontal glass and frontal sheet cover and requirements for anti-climb devices and the case of collision with road vehicles is given. Requirements for energy absorption of the bearing structure during collision are considere...

Reliability, availability and their mutual relationship are very important characteristics of railway vehicles. This paper presents how to determine the influence of railway vehicle reliability on its availability, using the real worked example with real values of these characteristics, for Serbian Railway conditions. Significant importance in achi...

Fulfilment of the optimal traction conditions (primarily the maximum tractive force and efficiency coefficient) of a diesel motor train depends on proper coupling of the diesel engine and turbo transmission (torque converter). During the construction and installation of new engines and transmissions, or during diesel engine replacement, it is neces...

Thermal load of the block-braked solid wheel railway vehicles is dominant on the other types of loads. This load, which is mainly consequence of long-term braking on downgrades for maintaining the defined constant speed purpose, is the main cause of occurrence of cracks on treads of wheel and finally fractures of wheel. The paper gives the analysis...

This paper analyzes the influence of the material limit fatigue strength mathematical expectation and standard squaring deviation (as a critical stress) on the railway vehicle solid wheel reliability under the affect of the mechanical loads. Reliability calculation was conducted using the methodology which includes the determination of the ideal wo...

The experimental method to determine the ultimate load capacity of the corrugated sheet is described. This method was applied to seven segments of different geometric parameters in order to obtain the reliable values for the forces affecting the stability of the corrugated sheet. The test applied to the corrugated sheet segments made of RSt13 steel...

Development of collision energy absorbing elements is a constituent part of passive protection of passenger coaches. The target of passive protection is to minimize the collision consequences. The absorber, described in this paper, is constructed from a standard seamless tube of the quality P235T1 and conical ring of the quality C45E. The solution...

Development of shock absorbers is one of the necessary measures for passive protection of passenger coaches. The purpose of passive protection is to minimize the collision consequences for passengers. Present solutions are based on the use of elements with a special structure that absorb a large amount of collision kinetic energy through controlled...