Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan

About: Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan is a education organization based out in Dnipro, Ukraine. It is known for research contribution in the topics: Track (rail transport) & Bogie. The organization has 736 authors who have published 655 publications receiving 1468 citations. The organization is also known as: Institute of Railway Transport Engineers.

Professional Competency of Modern Specialist: Means of Formation, Development and Improvement

Abstract: The modern scientific and methodical approaches to the study and analysis of professional competence that are in line with the state requirements for reforming education and the tendencies of introducing a competent approach as one of the key factors of today's vocational education are analyzed. The emphasis is placed on the fact that implementation of the competence approach should include the use of professional training of real professional tasks with the orientation of future professionals to analyze the results of their own professional activities and decisions. The basic principles of professional training of future managers of economic security are determined. It has been established that the professional training of future managers of economic security should be carried out on a modular basis.

Probabilistic-physical approach to describe and determine the reliability of cars

Abstract: Purpose. The article aims to develop an algorithm and a sequence of description and determination of car reliability to predict certain quantitative indicators of the studied elements, parts and units, or a car as a whole on the basis of probabilistic-physical approach. Methodology . For the calculation of the indicators of reliability, durability and safety of cars the probabilistic-physical method was used, which takes into account the resources consumption inevitable in the operation of cars. The methodology of quantifying the reliability is based on the study of the physical-mechanical and physical-chemical properties and parameters of various elements, with the identification of principles of the aging processes of the elements or parts (with operating time) to determine the analytical dependencies of these processes from the indicators of cars reliability. Findings. On the basis of probabilistic-physical approach it was developed a model to describe and determine the reliability of the cars. At this the method of calculation based on probabilistic-physical model is fundamentally different from all known rigorous probabilistic methods by the fact that it considers a continuous set of states of the elements, parts and systems of the car during continuous time. If there exists or (if it possible to find) the information parameter about the resource consumption of the car element with evaluation of its change speed, and knowing its limit, based on the built car reliability model with the involvement of probabilistic-physical approach, one can predict all the necessary quantitative indicators of reliability of the studied elements, parts and units or a car as a whole. Originality. The methodology of the reliability construction with the use of probabilistic-physical model with DN-distribution was further developed in the article. The specific physical interpretation of the constants of DN-distribution of failures makes it possible to evaluate them according to the results of the study of certain parameters characterizing the technical condition of the car. On the basis of probabilistic-physical approach the algorithm and the sequence of description and determination of cars reliability to predict certain quantitative reliability indicators of the studied elements, parts and units, or a car as a whole were developed. Practical value. The results make it possible to calculate in practice the quantitative indicators of reliability of cars or their individual elements for further prediction of the overall reliability during operation.

Investigation of dynamic characteristics of gondola cars on perspective bogies

Abstract: Purpose . In this paper, it is necessary to examine the dynamic properties of the gondola car with bogies, model 18-1711 when it moves on straight and curved sections of a track. Methodology . The calculations were performed using the object-oriented programming on the program "Dynamics of Rail Vehicles" ("DYNRAIL" Myamlin S.V. registered 20.03.2003). Mathematical models of a gondola car and bogies 18-100 and 18-711 were created for the calculations. Findings . Dynamic performances comparison of the gondola car with bogies 18-1711 and the gondola car with bogies 18-100, obtained by calculation method was carried out. Originality . Firstly calculations in order to determine the dynamic properties of the gondola car with bogies 18-1711 when it moves on straight and curved sections of track were performed. At the same time an assessment of the dynamic characteristics of the gondola car was made. The following dynamic standards were determined: the coefficient of vertical dynamics (C dv ), the coefficient of horizontal dynamics (C dh ), and the safety factor against derailment (SF d ). Track irregularities in vertical and horizontal transverse planes were assigned as perturbations. They should be so that the dynamic indexes of the widely used in operation gondola car on bogies model 18-100 keep in admissible range of speeds up to 80km / h for the empty gondola car and at speeds up to 90km / h for the loaded gondola cars. Practical value . As a result of the calculations and comparisons of their results, we have findings that the use of bogies with bilinear characteristic of the central suspension will improve the dynamic performances of gondola cars, currently operating on bogies, model 18-100. And by improving the dynamic performances it is possible to increase the permissible speeds of these cars motion.

Phenomena induced by UV irradiation in PbMoO4 single crystal

Abstract: Electrical properties and optical absorption of PbMoO4 single crystal were studied after UV irradiation. Anomalies of permittivity e and conductivity σ were detected and attributed to the dipole ce...

Development of scientific school of transport mechanics: artistic legacy of YE. P. Blokhin

Abstract: Purpose Development of domestic and global transport science occurred due to the contributions of many scientists and practicing engineers The purpose of our study is the analysis of scientific documentary legacy of YE P Blokhin, Doctor of Technical Sciences, Professor of Dnipropetrovsk National University of Railway Transport named after Academician V Lazaryan and identifying his place and role in the development of modern railway transport Methodology Application of problem-chronological, comparative, descriptive historical methods of research, systematization and analysis of scientific papers allowed the authors to submit the actual history of the railway transport development (1950-2013) through the prism of YE P Blokhin scientific activity We identified 6 main periods of his scientific activity Findings It was found out that the overall intellectual plant of the scientist includes 555 scientific papers (written personally and co-authored) in domestic and foreign publications on key issues of mechanics and operation of railway rolling stock Artistic legacy of YE P Blokhin includes monographs, articles, reports, patents, author certificate, etc It was found that the epistolary legacy of scientist, archive materials, his personal diaries, reference list of works of his students and followers are almost unexplored Originality Authors of the work for the first time in the history of science and technology of Ukraine conducted a complex study of the scientific legacy of YE P Blokhin in the context of railway transport It is proved that the ideas, research, scientific works, implemented projects, numerous students and followers of YE P Blokhin are important factors, confirming a significant contribution of the scientist to the global engineering and transport science Practical value The work can be used to create historiographical papers and textbooks, to study the issues of formation and development of the scientific school for transport mechanics and university science ofUkraine in the railway branch, in the course of lectures on the subjects «History of railway transport development» and «Introduction to the profession»