Kharkiv National Automobile and Highway University
Kharkov, Ukraine
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Naumov V.,Cracow University of Technology | Kholeva O.,Kharkiv National Automobile and Highway University
Procedia Engineering | Year: 2017

A method of studying a flow of requests on freight forwarding services with the use of the information logistics portal tools has been proposed. On the base of experimental studies results for the Ukrainian road transport market, distributions of the request flow parameters have been grounded and numerical characteristics of demand for services of Ukrainian freight forwarding companies have been determined. © 2017 The Authors.

Naumov V.,Cracow University of Technology | Samchuk G.,Kharkiv National Automobile and Highway University
Procedia Engineering | Year: 2017

Transfer nodes are essential elements of public transport systems which provide door-to-door transport services for passengers. Parameters of the technological processes in public transport systems are stochastic variables, thus, computer simulations are usually used for solving optimization problems of public transport. There is a number of simulation tools supporting decision-making in public transportation, but they don't provide the flexibility for solving the transfer nodes optimization problems. Authors present a library of classes implemented in Python, which could be used for computer simulations of public transfer nodes. The proposed software allows researchers to change technological parameters during simulation procedures and makes possible automatization of simulation experiments in the field of passengers' transportation. © 2017 The Authors. Published by Elsevier Ltd.

Sinkovskaya O.,Kharkiv National Automobile and Highway University | Ignatenko A.,Kharkiv National Automobile and Highway University
MATEC Web of Conferences | Year: 2017

This paper deals with a cylindrical steel-concrete load-bearing unit. The feature of the unit is a steel mesh casing that is made from the expanded metal mesh. The optimal parameters of the suggested footing are determined taking into account anisotropy, i. e. different strength and rigidity in different directions that coincide and do not coincide with the direction of reinforcement. The optimal cell angle, when a casing deformation brings about maximum compression of a concrete core, is determined. Details for theoretical calculation of the bearing capacity of a cylindrical steel-concrete load-bearing unit are provided taking into consideration a complex three-dimensional structure of the suggested mesh casing. The validity of the calculations is confirmed by comparison them with the results of the Lira software package. The results of the calculations are provided in the form of the table showing the dependence of the adduced thickness of the plate on the longitudinal movement of the strip of the steel mesh casing. The dependencies to determine the adduced thickness of the mesh casing using the graphical method are provided for all the existing types of the mesh using concrete wedges or excluding them. © The Authors, published by EDP Sciences, 2017.

Sakhatsky V.D.,Kharkiv National Automobile and Highway University | Ianushkevych S.,Kharkiv National Automobile and Highway University
2017 11th International Conference on Antenna Theory and Techniques, ICATT 2017 | Year: 2017

The design of a cylindrical coaxial horn antenna with a generatrix bend and the central conductor mounted along its axis is proposed. Two constructions types (varieties) of such antenna are studied. In the first case, such conductor is a metal-dielectric rod, which does not reach the throat of the horn. In the second one it is a copper rod, reaching the throat of the horn. Experimentally confirmed that for certain sizes of the rod such antenna constructions provide reduced width of the antenna pattern by 120 and allow to receive electromagnetic wave with arbitrary polarization. © 2017 IEEE.

Filipkovskii S.V.,Kharkiv National Automobile and Highway University
Strength of Materials | Year: 2017

A model of forced vibrations of a rotor with two axially preloaded angular contact ball bearings and a procedure for studying them have been developed. In the model, vibrations are excited by the joint action of the unbalance and vibration of the supports. Amplitude-frequency characteristics, resonances, the stability and bifurcations of vibrations have been analyzed. © 2017 Springer Science+Business Media, LLC

Batygin Y.V.,Kharkiv National Automobile and Highway University | Golovashchenko S.F.,Ford Motor Company | Gnatov A.V.,Kharkiv National Automobile and Highway University
Journal of Materials Processing Technology | Year: 2013

The paper is dedicated to the study of pulsed electromagnetic attraction processes which can deform ferromagnetic sheet metal materials such as low carbon steels using low frequency discharges. The analytical model based upon the solution of Maxwell equations explains that magnetic forces are prevailing over the Lorentz forces for low frequency discharges. For electromagnetic forming (EMF) processes employing ferromagnetic sheet metal blanks of low electrical conductivity with relatively slow electric discharges, the magnetic forces should be taken into account in order to achieve a correct representation of electromagnetic forces applied to the blank. An engineering estimate on the size of magneto-static forces and Lorentz-forces is the outcome of the analytical work. In addition to analytical work and validation of the proposed engineering estimate of attracting forces, a single turn coil is introduced which is more robust than previous designs with multiple frequencies and interrupted discharges. The simplified setup only requires a rather slow single frequency low voltage electric discharge which allows for using cheaper and longer life capacitors, substantially reduces the safety implications and also extends the life of the coil insulation. © 2012 Elsevier B.V.

Maliar V.,Kharkiv National Automobile and Highway University
Procedia Engineering | Year: 2016

The method and equipment for determining the mechanical properties of different road bitumen were developed in KhNAHU. The method has three schemes of deformation and fracture of binders, which are located in thin layers. As a result, the following quality parameters of bitumen can be defined: the limiting tensile strength, specific energy fracture, the limiting shear strength (cohesive strength) and the glass transition temperature. The paper shows the dependence of these parameters on the change in thickness of bitumen films, the strain rate (load) and temperature. Information about the cohesive strength of asphalt with different viscosities and different structural types ("Sol" "Gel" and "Sol-Gel") is shown here. Bitumen composition has different influence on its strength, so comparisons of cohesive binder properties with the same consistency were made. © 2016 The Authors.

Musiienko I.,Kharkiv National Automobile and Highway University
Procedia Engineering | Year: 2016

The perspective direction of computer-aided designing of road is optimization algorithms development. Optimization problems solutions can improve the quality of roads projects. Analysis of optimization methods in computer-aided road design system has been shown. These problems solving through the method of flexible bracelet implementation had been suggested. In the article the concept of the geometric implementation of the flexible bracelet method as a method of computer-aided highways designing has been considered. It is advisable to use a rectangle as the flexible bracelet link at this stage of this method development. © 2016 The Authors.

Fastovska T.,Kharkiv National Automobile and Highway University
Mathematical Methods in the Applied Sciences | Year: 2015

We consider a nonlinear system of thermoelasticity in shape memory alloys without viscosity. The existence and uniqueness of strong and weak solutions and the existence of a compact global attractor in an appropriate space are proved. © 2015 John Wiley & Sons, Ltd.

Sadovaya V.V.,Kazan Federal University | Khakhlova O.N.,Bashkir State University | Reznikov A.A.,Kharkiv National Automobile and Highway University
International Journal of Environmental and Science Education | Year: 2015

Thematic justification of the study is conditioned by the fact that in contemporary system of higher professional pedagogical education we can see serious drawbacks in training the future teachers for the methods of organizing leisure time activities and interacting with children. Therefore, this article studies the problem of future social teachers being professionally ready to organize children's leisure activities. Personal-activity and individual- creativity approaches were the leading in our research. As a result we have revealed the essence and content of social teacher’s professional activity, components of its professional readiness to organize the leisure activities of children and adolescents. We have shown technological and substantive aspects of professional training of future social workers such competence in the educational process of pedagogical high school. The material given here is of practical significance for specialists in the organization of children's leisure; for a system of higher education in organizing the special courses of future teachers training. © 2015 by iSER, International Society of Educational Research.

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