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Articles 31 - 60 of 85
Full-Text Articles in Engineering
Choice Of Basic Parameters, Calculation And Design Of Pulse Magnetizing Devices, J.F. Kurbanov
Choice Of Basic Parameters, Calculation And Design Of Pulse Magnetizing Devices, J.F. Kurbanov
Journal of Tashkent Institute of Railway Engineers
The purpose of this work is to develop methods and devices degaussing rail lashes. Magnetization in railway transport plays an important role for the safety of train traffic. Therefore, it is necessary to develop methods and devices for the demagnetization of products in railway automation and remote control, which is an urgent task. The residual magnetization leads to swelling of the welded joints of the rails, which leads to the formation of cracks, which can lead to train accidents during their movement. During the operation of the railways, magnetization also occurs due to the rotation of the wheel sets and …
Development Of Railway Automation And Telemechanics Systems In Modern Conditions, N.M. Aripov, D.X. Rixsiyev
Development Of Railway Automation And Telemechanics Systems In Modern Conditions, N.M. Aripov, D.X. Rixsiyev
Journal of Tashkent Institute of Railway Engineers
The article deals with the development of railway automation and telemechanics systems in modern conditions by upgrading existing track receivers of rail circuits. We recommend a microcontroller-based track receiver for station rail circuits. The developed electrical device-an electronic pulse-phase track receiver based on a microcontroller - will serve to improve the existing relay track receivers, increase the reliability and service life of the elements of the rail chain, minimize preventive maintenance, and reduce the cost of equipment. The proposed solution significantly reduces the risk of dangerous failures of station rail circuits, and also increases the safety of train traffic
Modeling Of Algorithms For Searching For Failures In Rail Circuits Of Railway Automation And Telemechanics Using Hierarchical Colored Petri Time Networks, P.E. Bulavskiy, O.K. Vaisov
Modeling Of Algorithms For Searching For Failures In Rail Circuits Of Railway Automation And Telemechanics Using Hierarchical Colored Petri Time Networks, P.E. Bulavskiy, O.K. Vaisov
Journal of Tashkent Institute of Railway Engineers
Studies have been carried out to estimate the recovery time of the operation of rail circuits of alternating current of 25 Hz, taking into account the formalization of technological processes for searching and eliminating failures based on the apparatus of hierarchical color temporary Petri nets. The developed simulation model is constructed by analyzing the state of technical means, statistical, regulatory documentation and observing technical specifications and regulations, local conditions and the location of signal points on the stage. The methods of the theory of Petri nets are used, which are based on the discrete-event paradigm of simulation modeling and the …
Labor Conditions Of Locomotive Staff Of Jsc "Uzbekiston Temir Yullari", O.T. Aliev
Labor Conditions Of Locomotive Staff Of Jsc "Uzbekiston Temir Yullari", O.T. Aliev
Journal of Tashkent Institute of Railway Engineers
The paper analyzes the results of certification of jobs for locomotive crew workers at the electric locomotive depot TCH-1, which is part of the structure of JSC “Uzbekistan Temir Yollari”. The working conditions of locomotive drivers and their assistants are determined with the influence of external and internal production factors on them. Trends in the occurrence of occupational diseases, such as sensorineural hearing loss and vibration disease in locomotive crew workers, were identified. Specific proposals for identified deficiencies are identified. According to the results of studies, it was determined that in such circumstances it is possible to provoke durable multifunctional …
Express Delivery By Rail Using Speed And High-Speed Trains, Sh.Sh. Kayumov
Express Delivery By Rail Using Speed And High-Speed Trains, Sh.Sh. Kayumov
Journal of Tashkent Institute of Railway Engineers
Currently, fast delivery of documents, money and small parcels are in great demand in the country. Due to the slow speed of delivery and quality of service, fewer and fewer people trust the state mail. In the article, the author suggests using speed and high-speed trains for these purposes, which will enable users of Express Mail to save time and money
Development Of Economic And Mathematical Model Of Calculation Of Expenses At Processing Of Cars At Sorting Station, D.B. Butunov
Development Of Economic And Mathematical Model Of Calculation Of Expenses At Processing Of Cars At Sorting Station, D.B. Butunov
Journal of Tashkent Institute of Railway Engineers
In this article the model is developed for calculation of the expenses connected with processing of cars on marshalling yard. Methods of economic-mathematical modeling are applied. It is formulated technique for definition of expenses when processing cars on marshalling yard. Expenses, the cars connected with processing on the example of classification yard service of "Ch" JSC UTY are calculated. Dynamics and structure of expenses by types of works on processing of cars at the station "Ch" is considered
Prospective Development Of The Railway Station Akhangaran-Tukimachi-Sirdarya, D.I. Ilesaliev, S.B. Sattorov
Prospective Development Of The Railway Station Akhangaran-Tukimachi-Sirdarya, D.I. Ilesaliev, S.B. Sattorov
Journal of Tashkent Institute of Railway Engineers
The planned China-Kyrgyzstan-Uzbekistan railway line is designed to connect East Asia with the Middle East and Southern Europe. However, aging of fixed assets of railways significantly reduces reliability and their throughput in the conditions of a continuously growing volume of freight traffic. This problem is associated not only with the development of new or improvement of existing technical solutions, but also with technological solutions related to planning, organizing and managing traffic flows in the future. After the launch of the China-Kyrgyzstan-Uzbekistan railway line, the Tukimachi station will become a major railway junction at the crossroads of North-South and East-West transport …
Issues Of Regulation Of Train Locomotives Of The Railway Section Chukursay-Saryagash, M.N. Masharipov, Sh.M. Suyunbaev, M.M. Rasulmukhamedov
Issues Of Regulation Of Train Locomotives Of The Railway Section Chukursay-Saryagash, M.N. Masharipov, Sh.M. Suyunbaev, M.M. Rasulmukhamedov
Journal of Tashkent Institute of Railway Engineers
The successive arrival of freight trains to the station performing border control of trains leads to a glut of adjacent sections by trains, mainly due to the employment of border guard brigades. Without the use of operational solutions in such conditions, the reserve of bandwidth is reduced and the need for locomotives is increased due to hot downtimes when the train station is not accepted for border control. This article has developed a methodology for regulating train locomotives, which allows to increase the useful work of train locomotives. The developed methodology will assist engineers and technicians in the connection of …
The Method Of Calculating The Middle Simple Locomotive And The Train Composition In The Turnover Point Based On The Modeling In The Conditions Of A Pair Traffic Of Trains, M.N. Masharipov
Journal of Tashkent Institute of Railway Engineers
The article developed a method for calculating the average downtime of a locomotive and the composition of a train at a turnaround point based on modeling in a pair train schedule. As a result of this, it is scientifically substantiated that strict adherence to the principle “trains do not expect a locomotive” will lead to a significant increase in the cost of locomotive hours at the point of turnover
Method Of Upgrading A Cargo Transport Units, Avaz Mirsultanovich Merganov
Method Of Upgrading A Cargo Transport Units, Avaz Mirsultanovich Merganov
Journal of Tashkent Institute of Railway Engineers
The costs associated with handling and transport- warehousing operations reaching about half of the total costs of the transportation process. In this regard, it is necessary to study the issues of consolidation of cargo units, as this will increase productivity and minimize logistics costs. This article describes the search algorithm for the consolidation of cargo units. The study also provides mathematical models of the relationship between the parameters of a piece load, container and a standard pallet. The practical significance is to increase the utilization rate of the standard pallet, besides the proposed method will allow you to choose the …
Mathematical Model Of Determining The Optimal Period Of Technical Maintenance Of The Special Self-Propelled Rolling Stock, Z.G. Mukhamedova
Mathematical Model Of Determining The Optimal Period Of Technical Maintenance Of The Special Self-Propelled Rolling Stock, Z.G. Mukhamedova
Journal of Tashkent Institute of Railway Engineers
The article covers the mathematical model for determining the optimum periodicity of maintenance, separately for mechanical, electrical and hydraulic equipment for emergency recovery vehicles
A Study Of The Implementation Of Standards-Time Of Wagons At Sorting Station, D.B. Butunov
A Study Of The Implementation Of Standards-Time Of Wagons At Sorting Station, D.B. Butunov
Journal of Tashkent Institute of Railway Engineers
The implementation of the established norms of the time spent by cars at the sorting station is investigated. The methods of statistical data processing and comparison of the time spent at the station with the established scheduled tasks were used. The structure of the time spent by transit cars with processing at the sorting station is analyzed. An element-by-element analysis of the time of transit cars with processing is carried out. The average daily savings and unproductive loss of time on the elements are determined. The costs of processing cars at the station, falling on each element of the time …
Geometric Formation Of Schemes Of Technical Objects In Automated Design Systems, M.A. Khadzhimuhametova
Geometric Formation Of Schemes Of Technical Objects In Automated Design Systems, M.A. Khadzhimuhametova
Journal of Tashkent Institute of Railway Engineers
This paper discusses the issues of mathematical support for the formation of various schemes of complex technical objects for a computer-aided design subsystem. Information is given on the description of the station diagram using finite element methods. On the one hand, it is required that the mathematical model be as universal as possible (cover all types of de-signed schemes), accurate, algorithmically reliable. On the other hand, it is required to ensure the minimum cost of the required memory of com-puter time. These contradictions are eliminated by creating a bank of models. Models are planned from separate modules of structural and …
Development Of Production Technology Of Foreign Resource-Saving Induction Motors, S.N. Kayumov
Development Of Production Technology Of Foreign Resource-Saving Induction Motors, S.N. Kayumov
Journal of Tashkent Institute of Railway Engineers
In the paper of work on the topic "Of Ethnology construction and work of asynchronous engines", in the laboratory class, the control task, conclusions and annexes. In accordance with the curriculum in the discipline "Electric and basis electronics", the fundamentals of the theory of asynchronous squirrel-cage rotors are developed ethnologic. A training module is developed, and a method for performing laboratory work, innovations and foreign experience, in the same place, a brief description of the curriculum of the program, in the laboratory class, the control task, conclusions and annexes.
Efficient Frequency Control System Of Asynchronous Motor, U.T. Berdiyev, A. Norboyev
Efficient Frequency Control System Of Asynchronous Motor, U.T. Berdiyev, A. Norboyev
Journal of Tashkent Institute of Railway Engineers
This paper discusses efficient frequency control systems that are widely used in the motion of production mechanisms of asynchronous motors with short-circuited rotor. From these systems, the functional circuit of the scalar frequency control system was analyzed
Iron-Based Soft Magnetic Materials Used In Electrical Engineering, G.A. Govor, A.K. Vecher, U.T. Berdiyev, N.B. Pyrmatov
Iron-Based Soft Magnetic Materials Used In Electrical Engineering, G.A. Govor, A.K. Vecher, U.T. Berdiyev, N.B. Pyrmatov
Journal of Tashkent Institute of Railway Engineers
This article discusses the characteristics and ways of obtaining soft magnetic materials on iron bases for manufacturing separate parts of magnetic cores of electrical machines. Soft magnetic materials shall have high initial and maximum magnetic permeability and low coercive force, and they shall have little loss of eddy current remagnetization, have a small hysteresis loop area and have relatively high electrical resistance. The production of electrical machine parts by powder metallurgy, compared to the magnetic metal products currently used, offers great advantages, reduced weight and size of parts, wider frequency range of materials operation, smaller vortex and magnetic losses and …
Plots Of Pojected Sorting Selection Hill’S The Uncertainty In The Formulas Of The Peak Constructive And Technological, Shuxrat Umarxodjayevich Saidivaliev
Plots Of Pojected Sorting Selection Hill’S The Uncertainty In The Formulas Of The Peak Constructive And Technological, Shuxrat Umarxodjayevich Saidivaliev
Journal of Tashkent Institute of Railway Engineers
In the article, on the basis of theorems on the change of kinetic energy for a non-free material point in the final form of theoretical mechanics, formulas for determining the braking path of the car in the braking zone of the sorting hill are derived. With a known value of the acceleration during the braking of the car the path of the car braking section can also be determined by the formula of the path of elementary physics. In the article on the basis of the theorem on the change of kinetic energy for a non-free material point in the …
Preventive Monitoring Railway Reinforced Concrete Bridges, I.G. Ganiev
Preventive Monitoring Railway Reinforced Concrete Bridges, I.G. Ganiev
Journal of Tashkent Institute of Railway Engineers
One of the main tasks of the railway industry of Uzbekistan, directly related to the development of the national economy, is the radical improvement of the condition of railways and structures on them. Therefore, the aim of this work is to develop practical preventive monitoring to increase the efficiency of the operational process. To achieve this goal, methods of scientific analysis, probability theory and stock theory, the principles of interaction, as well as experimental-static methods of compiling models were used. Using the developed preventive monitoring, it can be correctly organized preventive monitoring to ensure the required operational reliability of existing …
Stability Of Slopes Of Embankments Of Railway Access Road To Jsc "Shargunkumir", U.E. Ergashev, N.I. Begmatov, F.F. Eshonov
Stability Of Slopes Of Embankments Of Railway Access Road To Jsc "Shargunkumir", U.E. Ergashev, N.I. Begmatov, F.F. Eshonov
Journal of Tashkent Institute of Railway Engineers
The article deals with the stability of the embankment slope. The scheme for the calculation and the results of the calculation of the stability of the embankment slope are presented. Based on the calculation results, transverse embankment profiles with a height of more than 12 m are designed and recommended for use
Modeling Of Theflow Regimes Of Water-Coal Fuel Slurries With Complex Reology In Cylindrical Pipes, Ja.D. Hodzhaev, Sh.A. Kasymov
Modeling Of Theflow Regimes Of Water-Coal Fuel Slurries With Complex Reology In Cylindrical Pipes, Ja.D. Hodzhaev, Sh.A. Kasymov
Journal of Tashkent Institute of Railway Engineers
The article deals the flow regimes with regard to the complex flow rheology of highly concentrated water-coal fuel slurries (WCS). It has been established that during the WCS flow through cylindrical pipes the flow mode is disturbed, which is due to the mutual influence of the geometric dimensions and flow parameters of the suspension when it is burned in the combustion chambers of power plants
Technology Of Strengthening Of Embankment Of Railways Of Sandy Soils With Application Of Geosynthetic Materials, K.S. Lesov
Journal of Tashkent Institute of Railway Engineers
This article reduced the technology of strengthening the embankment of the railway roadbed from sandy soils with the use of geosynthetic materials. Constructive and technological solutions execution of work are given
Some Aspects Of Evaluating Economic Efficiency During Thermal Renewal Of External Walls Of Civil Buildings, S.S. Shaumarov, S.I. Kandakhorov
Some Aspects Of Evaluating Economic Efficiency During Thermal Renewal Of External Walls Of Civil Buildings, S.S. Shaumarov, S.I. Kandakhorov
Journal of Tashkent Institute of Railway Engineers
This article presents the results of calculations to determine the payback period for the installation of additional insulation of the outer walls of civil buildings, taking into account the increase in tariffs for thermal energy. From a practical point of view, this calculation allows us to evaluate the economic efficiency of the thermal renewal of the outer walls of civil buildings
On The Formation Of The Variational Equation Of Motion And Boundary Value Problems Of Thin-Walled Axisymmetric Shell Structures, A. Abdusattarov, F.E. Abduqodirov, N.H. Sabirov
On The Formation Of The Variational Equation Of Motion And Boundary Value Problems Of Thin-Walled Axisymmetric Shell Structures, A. Abdusattarov, F.E. Abduqodirov, N.H. Sabirov
Journal of Tashkent Institute of Railway Engineers
The article deals, on the basis of the Hamilton-Ostrogradsky variational principle, a system of differential equations of motion of axisymmetric shell structures with the corresponding boundary and initial conditions is derived. The boundary problem for cylindrical and spherical shell structures is formulated
Calculation Of The Wagon Motion Velocation On The Whole Protection Of The Profile Of The Way With Different Clothes Of The Sorting Hill, Kh.Kh. Djalilov
Calculation Of The Wagon Motion Velocation On The Whole Protection Of The Profile Of The Way With Different Clothes Of The Sorting Hill, Kh.Kh. Djalilov
Journal of Tashkent Institute of Railway Engineers
In this article has been calculated the velocity of the wagon’s movement in various sites of a hump yard, based on the formula led on the basis of the theorem of changing of kinetic energy for not free material point in a final form. Results of the calculations are noticed that on the intermediate site of a hump yard to a dividing arrow the relative error of calculation is equal to 10.3%, on the site of an arrow zone of a hump yard of the second dividing arrow - δv6с2 ≈ 9.0%, on the site of the first sorting way …
To The Question Of Producing Efficient Construction Materials Based On Waste Of Agricultural Crops, Anvar Ishanovich Adilkhodjayev, I.M. Mahamataliev, A.T. Ilyasov
To The Question Of Producing Efficient Construction Materials Based On Waste Of Agricultural Crops, Anvar Ishanovich Adilkhodjayev, I.M. Mahamataliev, A.T. Ilyasov
Journal of Tashkent Institute of Railway Engineers
One of the promising areas of agricultural waste use is its use as raw material for the pro-duction of efficient building materials for energy-saving technologies, which is especially im-portant for areas that have a waste of agriculture and are in short supply in easily accessible building materials. On the other hand, an important task of technical policy is now to increase the use of lightweight structures in order to reduce the mass of erected structures, reduce the cost of transport costs and the cost of installing structures. In this regard, the use of dry cotton stems (guzapai) in a specially …
On The Construction Of Canonical Systems Of Equations For Cylindrical And Spherical Shell Structures, A. Abdusattarov, F.E. Abduqodirov
On The Construction Of Canonical Systems Of Equations For Cylindrical And Spherical Shell Structures, A. Abdusattarov, F.E. Abduqodirov
Journal of Tashkent Institute of Railway Engineers
In this article is given the construction of canonical systems, the equation of motion for axisymmetric shell structures, as well as for cylindrical and spherical shells
Research Of Surface Condition Of The Rails Rolling On Sections Of High-Speed And High-Speed Train Traffic, E.B. Abdualiyev
Research Of Surface Condition Of The Rails Rolling On Sections Of High-Speed And High-Speed Train Traffic, E.B. Abdualiyev
Journal of Tashkent Institute of Railway Engineers
In this article, the analysis of intensity of the pulse roughness’s arising on a surface of rolling of heads of rails on a site of high-speed movement of trains is carried out.
Method Of Activation Of Cement Mixture Components By Ultrasonic Field, U.A. Yokubov, O.V. Trunilina, V.N. Avdievich, S.Z. Mirzaev, S.E. Kurbanbaev
Method Of Activation Of Cement Mixture Components By Ultrasonic Field, U.A. Yokubov, O.V. Trunilina, V.N. Avdievich, S.Z. Mirzaev, S.E. Kurbanbaev
Journal of Tashkent Institute of Railway Engineers
The theoretical and experimental methods of increasing the efficiency of cement disperse systems by the action of a low-energy ultrasonic field are given in the article, as well as a technique providing highly efficient treatment of mixing water with a minimum energy expenditure
The Movement Of Trains As A Source Of Seismic Waves Impact On The Upper Structure Of The Track And The Roadbed Of Railways, A.H. Abdujabarov, P. A. Begmatov, M. Mehmonov
The Movement Of Trains As A Source Of Seismic Waves Impact On The Upper Structure Of The Track And The Roadbed Of Railways, A.H. Abdujabarov, P. A. Begmatov, M. Mehmonov
Journal of Tashkent Institute of Railway Engineers
On the basis of theoretical and experimental scientific research, the substantiation of the similarity of the impact of seismic forces and the movement of rolling stock on the engineering structures of Railways is obtained.
About Movements Of The Carriage On The Profile Hump In A Gravity Yard, Sh.B. Djabbarov
About Movements Of The Carriage On The Profile Hump In A Gravity Yard, Sh.B. Djabbarov
Journal of Tashkent Institute of Railway Engineers
The article noted that in the existing methods of calculation of hump in a gravity yards the speed of the car at the braking position is determined by the formula speed of free fall of bodies given the inertia in the rotating parts of the car. Thus assume that in areas of deceleration occur rotation of the wheels of the car, that is incorrect. In it mathematical expressions and examples of calculations proved that the high-speed sections slides occur the rolling of the wheels of wheel pairs without slipping.