Glib Vatulia

O.M. Beketov National University of Urban Economy in Kharkiv

The article describes the optimization of vertical body struts of the bearing structure of the grain hopper wagon. The study included obtaining mathematical models using modern methods of the mathematical planning of the experiment. At the same time, the target function of the optimization was to reduce the material consumption for the strut. Based...

In order to reduce the load of the open wagon body in operation, it has been proposed to use sandwich panels for sidewalls. The effectiveness of this solution was studied through the transverse loading of the open wagon body in operation. This included the building of a mathematical model that described the movement of a loaded open wagon during la...

This paper aims at an improvement in the frame of a passenger car for its higher efficiency. A special feature of this improvement is the closed configuration of the center sill that can be formed with sheets. The mass of the center sill can be minimized through its optimization with linear programming. The results of the calculation demonstrated t...

Higher efficiency of freight transportation can be achieved through the use of a hopper-type container. This paper presents the results of determining the dynamic loading for a container placed on a flat car during shunting impact. It was found that the maximum accelerations to a container in the longitudinal direction were 36.7 m/s 2 (3.7g). The v...

Мета. Основною метою роботи є висвітлення результатів визначення міцності контейнера зі стінами із сендвіч-панелей за основних експлуатаційних режимів навантажень. Методика. Для забезпечення міцності несної конструкції контейнера запропоновано виготовити його торцеві та бокові стіни із сендвіч-панелей. При цьому передбачено створення сендвіч-панеле...

By using the data of observation of the mechanical elements of brake systems of wagon bogies, the authors have identified major malfunctions of the device M 1180.000 for the parallel retraction of brake shoes, associated with failures in the brake lever gears of wagon bogies in operation. Such failures cause significant losses estimated as hundreds...

The article presents the results of the research into the vertical dynamics of the long-base flat wagon loaded with hopper containers. The research was made for a 13-7024 flat wagon loaded with four 1CC containers. The containers were studied as added masses interacting with the flat wagon frame through the elastic linkage. The research included th...

The article presents the results of the research into the transverse loading of the container during rail transportation. The peculiarity of the container is its walls made of sandwich panels. Such a solution will help to reduce the dynamic loading on the container in operation and, accordingly, improve its strength. Appropriate calculations have b...

Вступ. Підвищення ефективності експлуатації залізничної галузі зумовлює необхідність впровадження комбінованих систем транспорту. Найбільш пріоритетними серед таких на сьогоднішній день є контейнерні перевезення, що обумовлено мобільністю контейнерів як транспортних засобів. Для утримання конкурентоспроможності контейнерних перевезень важливим є пі...

The article provides the results of determining the thermal stress state of the composite brake pad of a wagon. The research is made by means of computer simulation with the finite element method using the SolidWorks Simulation options. The design diagram of the pad includes not only the horizontal loads due to its pressing to the rolling surface o...

The object of the research is the processes of thermal stress, perception and redistribution of loads by the brake composite pad during braking of the car in operation. In the current conditions, wedge-dual wear of composite brake pads is observed in the braking systems of freight cars, the feature of which is the deterioration of the braking effi...

Increased volumes of freight turnover in international transportation require the situational adaptation of the existing wagon fleet to the transportation of containers, which are commonly used at present. The research presented in this article substantiates the possibility of transporting containers in open wagons. It has been found that taking in...

The publication presents the results of research into the strength of an improved tank container. The tare of a tank container can be reduced through application of composite material for the tank. In this case its mass can be 46% lower than that of a metal tank. The strength of the tank was calculated by computer simulation. The maximum stress occ...

The object of research is the processes of emergence, perception, and redistribution of loads in the body of a universal railroad gondola with a cladding of corrugated sheets. To improve the strength of the sheets of cladding, it is proposed to strengthen the most loaded area in terms of height (1/3 of the bottom tie-up) with horizontal corrugatio...

The increasing demand for container transportation makes it necessary to equip the wagon fleet with appropriate flatcars in good technical condition. The study deals with the determination of the strength of the flatcar during shunting impacts using the finite element method. The flatcar model 13-401 modernized with fixed fittings for securing cont...

The object of this study is the processes of emergence, perception, and redistribution of loads in the supporting structure of a 1CC size container with end walls made of sandwich panels. To reduce the longitudinal load of the container under operational modes, the introduction of sandwich panels into its design is proposed. This solution is imple...

It is proposed to improve hopper wagon design to provide the possibility of simultaneous transportation of different types of cargo. This improvement consists of dividing the body into two separate sections, interacting with each other through a vertical wall and horizontal connecting belts. A calculation by using the FEM in the SolidWorks Simulati...

The article presents the results of determining the longitudinal dynamic load of a container of standard size 1CC with sandwich panel walls. A mathematical model was developed that takes into account the longitudinal load of a container placed on a platform wagon during a displacement collision. The use of sandwich containers as components was foun...

The article deals with the results of the study into the strength of the solid-bottom open wagon body when transporting containers. To determine the dynamic loads acting on the open wagon body while the containers are moving due to technological gaps between container fittings and fitting stops, mathematical modelling is carried out. The obtained a...

In order to reduce the container's dead weight, while ensuring its strength conditions, the rational parameters of the corrugations are determined. The first stage includes the study of a lining plate taken as a thin-walled slab. The slab thickness is determined with the Bubnov-Galerkin method. The moment of resistance to the cross-section of the p...

The efficiency of functioning of the transport industry necessitates the introduction of modern vehicles. Since the main segment of the transportation process is allocated to rail transport, the creation of modern wagon designs must be subject to special requirements. This applies in particular to their load-bearing structures. When designing the l...

Higher operational efficiency of container transportation can be achieved by putting into operation hopper containers. The special feature of a container is its inclined end and sidewalls, which makes it possible to self-discharge bulk freight through the discharging hatches forming the floor. The vertical loading of a hopper container placed on th...

The article presents the results of determination of the loading of a removable module for transportation of long freight in a combined train by the train ferry. The article describes the results of the mathematical modelling of the dynamic loading on a removable module placed on the flat car during rolling motion of the train ferry. It suggested t...

The object of this study is the processes of occurrence, exposure to, and redistribution of loads in the supporting structure of a removable module for the transportation of long cargoes. To adapt platform cars to the transportation of long loads, it is proposed to introduce a removable module with elastic-friction connections in the structure. I...

The article presents the results of the strength calculation of the FLAT RACK removable module design using the finite element method. The FLAT RACK removable module provides higher efficiency of freight transportation. The special features of the removable module are its components made of rectangular tubes and its fittings with viscoelastic bonds...

The object of research is the processes of occurrence, perception and redistribution of loads in the design of the car brake cylinder in operation. To compensate for angular shifts of the brake cylinder rod at its maximum exit from the housing, improvement measures are proposed. This improvement consists in the use of a safety element to limit the...

This research uses the finite element method to determine the strength of the bearing structure of a flat car during shunting impacts with. The authors determined the fields of the maximum equivalent stresses in the bearing structure of a flat car. The strength was also researched with the strain-gage method. The test results showed that the maximu...

This paper deals with the use of containers with convex walls to achieve higher operational efficiency. This can increase the useful capacity of the body of the car by 8% in comparison to that of the prototype car. A 12-757 open car manufactured at Kryukovsky Railway Car Building Works was taken as the prototype car. The study presents the results...

The authors suggest elastic elements in the body of a centre sill being the basic carrying element of the frame to decrease the dynamic loads. This solution can transform the dynamic loads on the body into the work of the dry friction forces between the components of the centre sill. The authors substantiated the solution by means of mathematic mod...

Purpose. The main purpose of this work is to substantiate the design features of sandwich panels for the manufacture of container walls of size 1SS. Methodology. To ensure the strength of the container walls, it is proposed to use sandwich panels as their components. This involves the manufacture of a sandwich panel from two metal sheets, between w...

This study concerns dynamic loading on the carrying structure of a flat car with elastic-friction longitudinal beams. The authors built a mathematical model including the vertical displacements in the carrying structure of a flat car symmetrically loaded with four 1 CC containers. The mathematical model was solved with MathCad software. It was foun...

The substantiation of use of a closed structure of the spine beam of a hopper car filled with a filler possessing viscoelastic properties is carried out. The dynamic loading of the load-bearing structure of a hopper car is determined taking into account the proposed solutions. It is established that the value of acceleration of the improved load-be...

This paper reports a study into determining the dynamic load and strength of the bearing structure of a covered freight car under operational modes. A feature of the freight car's bearing structure is that the girder beam has a closed cross-section. To reduce the dynamic load of the frame, the girder beam is filled with a material with viscoelastic...

Для зменшення навантаженості рам вантажних вагонів при експлуатаційних режимах запропоновано використання наповнювачів у їх складових. Використання наповнювача доцільно здійснювати в найбільш навантажених елементах несучої конструкції, а саме – хребтовій балці. У зв’язку з цим необхідною умовою використання наповнювача в хребтовій балці є створення...

The article presents the results of determining the loads on the carrying structure of a flat wagon transported military equipment. The authors suggest that stable fixation of military equipment can be provided with special rings mounted on the flat wagon structure. The results of the strength calculation confirmed the efficiency of this solution....

This research deals with determination of the loading of an open container during operating modes. The special feature of this container is its convex walls. This engineering solution increases the useful capacity of a container by 8% in comparison to that of the prototype. The elastic elements in the bearing structure of a container were introduce...

The research is concerned with the use of double walls filled with aluminium foam for an open wagon in order to decrease the dynamic stresses during the operational modes. The research presents the strength calculation for the bearing structure of an open wagon with consideration of the engineering solutions proposed. It was found that the maximum...

A study of the dynamic loading of the carrying structure of a tank wagon during transportation on a railway ferry was carried out. The studies were carried out with the angular displacements of the railway ferry around the longitudinal axis (lurch), as the case of the highest load on the carrying structure of the tank wagon. It was found that the a...

The article presents the results of determining the dynamic load of the load-bearing structure of the tank container placed on a roll-trailer during transportation by railway ferry. For this purpose, a mathematical model was developed, which takes into account the dynamic loading of the tank container during angular displacements of the railway fer...

This paper reports a study into the dynamic loading and strength of an improved carrying structure of the platform car. A special feature of the car is the presence of elastic elements in the main longitudinal beams of the frame. This could improve the fatigue strength of the carrying structure of the platform car under operational modes. Mathemat...

The article determines the residual resource of flat wagons load-bearing structures with a 25-year service life. For this purpose, field studies of the technical condition of the load-bearing structures of flat wagons based on the wagon depot of the Foundation of the Southern Railway branch of JSC "Ukrzaliznytsia" were carried out. The flat wagon o...

The study deals with research through mathematic modeling of the dynamic loading on the carrying structure of a flat wagon in transportation of military equipment conducting fire. A 13-401 flat wagon loaded with a tank with combat load of 55 tons was taken as the prototype. The mathematical model was solved in MathCad software. It was established t...

The article presents the evaluation results of load-bearing capacity exhaustion of steel-concrete slabs under concentrated and distributed short-term loading. The authors investigate the performance peculiarities of square, circular, and octagonal samples. The results of the experimental research were verified by comparison with the results of fini...

The article deals with the integrated approach to the study of the behaviour of rectangular CFST columns under eccentric compression. Such an approach includes the development of methods for assessing the magnitude of the carrying capacity, assessing the degree of reliability and credibility of the obtained results, as well as studying the nature o...

The article describes the optimal design method for three-hinged arches with given topology. The examples of optimization of the three-hinged arch with constant and uniform-strength cross section subjected to the distributed load are considered. The optimization technique is based on the geometrical parameters and design features of the systems. Th...

Higher efficiency of bulked cargo transportation along international transport corridors can be achieved with a resource-saving tank container described in the study. A characteristic feature of a tank container is the use of circle pipes as the carrying elements of the frame. In order to decrease impact loads between fittings of the tank container...

Higher operational efficiency of hopper cars can be achieved with the flash-concept for a resourcesaving structure. The characteristic feature such cars is the use of circular pipes as the carrying body elements. The engineering solution made it possible to decrease the tare weight of a hopper car in comparison with that of a prototype by 5%. A 20-...

The article deals with the findings of experimental and theoretic research into the efficiency of applying prepared substances TM MAPEI for chemical soil stabilization for foundations of buildings in reconstruction. The objects of the study were soils of rapid, average and slow permeability. Determination of physical and mechanical characteristics...

The article presents the developed rationalization technique of composite steel reinforced concrete sections with steel open section beams based on the criterion of equal strength of the section elements that are extremely distant from the neutral line. Algorithms for search for geometric parameters of a composite section limited to a certain range...

The approach to calculating CFST elements is considered in which physical non-linearity of materials, geometric non-linearity of the tube and the effect of increasing the strength of the core are taken into account. Finite element models are developed and proposed as the basis for more accurate method of calculating concrete-filled steel elements c...

In this article is presented comparison of optimized calculation of combined constructions results, in which quality is chosen truss beam. The results of beam calculating by dint of the method which based on spacer systems properties and construction’s calculations designed in program complex LIRA are compared. Article is dedicated to verify the ad...

Experimental studies of rectangular steel-concrete columns under centric compression with random eccentricity were conducted. The stress-strain state and the carrying capacity exhaustion have been assessed. The regression dependence is proposed to determine the maximum carrying capacity of such columns. The mathematical model takes into account the...

The article presents a comparison of results of optimized calculation of a truss beam which was chosen as a combined construction. The results of calculation of a beam are compared using the method based on the properties of spacer systems and the calculation of the construction designed in LIRA software complex. The article is dedicated to verific...

In the current practice of construction and design of transport facilities, structures with external reinforcement are commonly used which effectively resist compression. The use of steel-concrete and composite structures enables us to reduce material consumption and cost of structures significantly. There are a few established approaches used to e...

For transportation of dangerous goods rail transport uses tank wagons. Structural changes can contribute to reduction in the maximum stresses, and as a result, to improvement in technical and economic characteristics of a tank wagon. In order to investigate the stress-strain state of a tank wagon the finite element model was built, its adequacy hav...

One of the most important factors determining the reliability and safety of operation of the continuous welded rail track is the temperature of the rails. All conditions of laying, repair and maintenance of the track during the entire cycle of rails operation depend on it. The existing rail temperature monitoring method does not take into account a...

Розглянуто підхід розрахунку трубобетонних елементів з урахуванням фізичної нелінійності матеріалів, геометричної нелінійності обойми та ефекту збільшення міцності ядра. Методика використовує кроково-ітераційний алгоритм за участю аналітичних залежностей і скінченно-елементного моделювання. Облік повзучості бетону побудованийна використанні узагаль...

In order to provide bending structures rationalization for reducing the materials consumption, labor and power inputs, construction or renovation terms, the authors considered the possibility of utilizing the structures with external steel sheet reinforcement and concrete layer made from fibers of different types. Experimental researches of various...