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Articles 31 - 60 of 91
Full-Text Articles in Engineering
Improvement Of Technological Standards Spent On Local Cars During Cargo Delivery, Jamshid Renatovich Kobulov, Jamshid Sayfullayevich Barotov
Improvement Of Technological Standards Spent On Local Cars During Cargo Delivery, Jamshid Renatovich Kobulov, Jamshid Sayfullayevich Barotov
Journal of Tashkent Institute of Railway Engineers
The article analyzes the norms of time that affect the movement of cars in case of violation of the terms of delivery of goods when sending cars from the station. When delivering goods from the shipper to the station track from the shipper to the shipper, a sequence was developed to find the total amount of time for performing operations on their Assembly from the station, as well as the total amount of time spent on technological operations before transferring the cars to the cargo owners at the designated station. After the arrival of local cars at the unloading station, …
Syntactic Analysis And Discussion Of Data On Carriage Of Railway For Storage In The Database Management System, Muzaffar Siddikovich Rasulov, Orifjon Alimovich Mirsagdiyev
Syntactic Analysis And Discussion Of Data On Carriage Of Railway For Storage In The Database Management System, Muzaffar Siddikovich Rasulov, Orifjon Alimovich Mirsagdiyev
Journal of Tashkent Institute of Railway Engineers
The paper analyzes the current state of obtaining information at a certain point in time of the carriage model of the road, and processing incoming data. According to the research results, the time of receipt of primary information from the information and computer center of the society and data processing was determined, both by the traditional method and by the method using information and communication technologies. And also, comparisons of the results are made. An algorithm for obtaining and processing information in real time has been developed. Practical recommendations on building a service for integration with an automated system for …
On The Development Of Mathematical Models Describing The Relationship Between The Parameters Of The Container Depot And Operation Technology, Daurenbek Ixtiyarovich Ilesaliev, Shaxboz Rovshan Ugli Abduvakhitov, Farrukh Kakhramonovich Azimov, Gulshanа Rasulovna Ibragimova
On The Development Of Mathematical Models Describing The Relationship Between The Parameters Of The Container Depot And Operation Technology, Daurenbek Ixtiyarovich Ilesaliev, Shaxboz Rovshan Ugli Abduvakhitov, Farrukh Kakhramonovich Azimov, Gulshanа Rasulovna Ibragimova
Journal of Tashkent Institute of Railway Engineers
Today, due to the increase in rail freight traffic, there is a shortage of containers, and the issue of shortage of containers has not been resolved for a long time. This substantiates the practical relevance of the study of container depots in railway transport. Connections with which the purpose of the article is to develop a methodology for the reliable determination of the most rational values of the parameters of the container terminal, thereby improving and increasing the level of customer service in transport in general.
Study Of The Influence Of An Alternating Magnetic Field On The Operation Of A Current Converter On The Magnetomodulation Effect, Abdurauf Malikovich Safarov, Sarvarbek Khamrayevich Jumaboyev
Study Of The Influence Of An Alternating Magnetic Field On The Operation Of A Current Converter On The Magnetomodulation Effect, Abdurauf Malikovich Safarov, Sarvarbek Khamrayevich Jumaboyev
Journal of Tashkent Institute of Railway Engineers
The paper proposes a design of a device for converting current to voltage with advanced functionality, designed to detect the asymmetry of three-phase currents in both DC and Made AC circuits. theoretical investigations and mathematical model of static characteristics of the Converter from changes in the magnetization curve of the magnetic material under the interaction of two fields generated by modulating current flowing in the modulation coil and an alternating magnetic field with a strength and created during the flow of DC buses DC field strength and shown that the nonlinearity of the dependence really is a principal factor responsible …
Dynamic Characteristics Of The New Magnetic Modulating Dc Difference Converter, Sultan Fayzullayevich Amirov, Sarvarbek Xamrayevich Jumaboyev, Nurilla Raxmatullaevich Yuldashev
Dynamic Characteristics Of The New Magnetic Modulating Dc Difference Converter, Sultan Fayzullayevich Amirov, Sarvarbek Xamrayevich Jumaboyev, Nurilla Raxmatullaevich Yuldashev
Journal of Tashkent Institute of Railway Engineers
It is shown that when a jump-like differential current is applied to the input of the transducer, its transient response consists of the sum of one steady-state and two free harmonic components with a frequency equal to double the modulation current frequency, the free components of which decay with rates depending on the time constants, respectively, the measuring and modulation magnetic circuit, and when a pulsating differential current with a frequency is applied to the input of the converter, the transient response consists of the sum of one harmonic steady-state component with a frequency equal to the modulation current frequency …
The Research Of Various Transient Processes In Current Transformers, Sultan Fayzullayevich Amirov, Shavkat Mukhsimov, Otabek Tashmuhammatovich Boltayev
The Research Of Various Transient Processes In Current Transformers, Sultan Fayzullayevich Amirov, Shavkat Mukhsimov, Otabek Tashmuhammatovich Boltayev
Journal of Tashkent Institute of Railway Engineers
In the article the transients occurring in current transformers are investigated and the values of secondary transient currents are determined using the operator's method with the help of a mathematical model of a wide-range current transformer using various primary sources. Using the obtained results, the regularities of secondary currents change over time are analyzed. It determined that, in the developed the wide-range current transformer, the influence of the aperiodic component of the primary current on the transformer current decreases with increasing the angle and creating a counter magnetomotive force in the core to expand the upper limit of the conversion …
The Features Of The Power Scheme Of The New Electric Locomotive 3es5К (Ermak) Of The Park Of Uzbekistan, D.O. Radjibaev
The Features Of The Power Scheme Of The New Electric Locomotive 3es5К (Ermak) Of The Park Of Uzbekistan, D.O. Radjibaev
Journal of Tashkent Institute of Railway Engineers
The paper analyzes the characteristics and features of the traction chain of the 3ES5K electric locomotive. The design features of the electric locomotive are noted. A comparative analysis of traction and energy indicators with an electric locomotive of the VL80s series is carried out. Based on the results of the analysis, the indicators of energy consumption and running time on the existing section of Angren-Pap with the same mass of the train were derived
Structural Scheme Of A Formalized Model Of The Process Of Accounting And Control Of Automation And Telemechanics Devices, D.Kh. Baratov, Nazirjhon Mukarramovich Aripov
Structural Scheme Of A Formalized Model Of The Process Of Accounting And Control Of Automation And Telemechanics Devices, D.Kh. Baratov, Nazirjhon Mukarramovich Aripov
Journal of Tashkent Institute of Railway Engineers
The article deals with the issues of functional support for the automated system of accounting and control of railway automation and telemechanics devices: signaling, centralization and blocking; presents the components of the electronic Executive part of the system; offers a conceptual model and describes the design features of the developed automated system.
To The Question Of Organization Of Client Radio Communications On Railway Transport, Natalya Valerevna Yaronova, Aliye Ayderovna Ametova
To The Question Of Organization Of Client Radio Communications On Railway Transport, Natalya Valerevna Yaronova, Aliye Ayderovna Ametova
Journal of Tashkent Institute of Railway Engineers
The article presents a way of organizing client radio communications using the high-speed «Afrosiyob» train as an example. The provision of additional services to train passengers is an essential condition for increasing the status of railway transport and its efficiency. It consists in organizing passenger access to the Internet and to multimedia services along the train
Determination Of Technical Condition Of Passenger Locomotives Using Diagnostic Equipment, M.Sh. Valiyev, X.R. Qosimov
Determination Of Technical Condition Of Passenger Locomotives Using Diagnostic Equipment, M.Sh. Valiyev, X.R. Qosimov
Journal of Tashkent Institute of Railway Engineers
The account of a real technical condition of the equipment of the locomotive at planning of volumes of its repair is one of the major reserves of reduction of working costs of railways and decrease in the cost price of transportations. The continuous control of a technical condition of the locomotive in operation is carried out with use of stationary and onboard means of technical diagnostics. In article the technique of an integrated estimation of a technical condition of quality of working process in the cylinder of a diesel engine with use of onboard diagnostic aids is offered.
Malfunction Analysis In The Freight Cars Used In Uzbekistan And Measures For Their Elimination, Nodir Botirovich Adilov
Malfunction Analysis In The Freight Cars Used In Uzbekistan And Measures For Their Elimination, Nodir Botirovich Adilov
Journal of Tashkent Institute of Railway Engineers
This article uses the analysis of malfunctions of the load-carrying apparatus of freight car structures used in Uzbekistan. The reasons for the occurrence of malfunctions in the load car structures are studied. It seems that in order to determine the technical condition of the device, it is possible to increase the reliability of the stored device by making the correct conclusion from the fault signs derived from the design parameters using information received from the controlled stands.
To Improve The Coupon System For Monitoring Compliance With Labor Safety At The Enterprises Of Jsc "Uzbekistan Temir Yullari», Sunnatulla Sulaymanov, Miraziz Mirkadirovich Talipov, Аbdigofur Dustov
To Improve The Coupon System For Monitoring Compliance With Labor Safety At The Enterprises Of Jsc "Uzbekistan Temir Yullari», Sunnatulla Sulaymanov, Miraziz Mirkadirovich Talipov, Аbdigofur Dustov
Journal of Tashkent Institute of Railway Engineers
The article discusses the issues of improving the coupon system for monitoring compliance with labor safety by establishing the level of labor protection at work and ranking the violations committed by departments and the enterprise as a whole. A modernized structure of the labor protection management system has been developed and a coupon control system has been proposed, integrated with three-level monitoring of the conditions and labor protection, which takes into account the magnitude of the coefficient of labor protection.
To The Prevention Of Fires Related To Accidents Of Municipal-Energy Networks Of The Destroyed Part Of The City, Sunnatulla Sulaymanov, Khasan Mirzakhitovich Kamilov, Miraziz Mirkadirovich Talipov
To The Prevention Of Fires Related To Accidents Of Municipal-Energy Networks Of The Destroyed Part Of The City, Sunnatulla Sulaymanov, Khasan Mirzakhitovich Kamilov, Miraziz Mirkadirovich Talipov
Journal of Tashkent Institute of Railway Engineers
This article presents the results of a theoretical study of the quantitative indicators of fires in the devastated part of the city during devastating earthquakes and a device for preventing fires by shutting off the power supply of residential buildings.
About The Influence Of The Structural-Phase State On The Functional Properties Of Titanium Nickelide, N.U. Abduraimova, Yu.N. Mansurov
About The Influence Of The Structural-Phase State On The Functional Properties Of Titanium Nickelide, N.U. Abduraimova, Yu.N. Mansurov
Journal of Tashkent Institute of Railway Engineers
For inducing form memory effects of FMEs, at least one deformation of the alloy is required. Traditionally, it is carried out at room temperature or in liquid nitrogen. The influence of the initial phase composition on different schemes of FME and OEPF guidance has been studied. The evolution of reversible and complete reversible deformation, depending on the induced deformation, has an extreme character, while the position of the maximum depends on the structural state: for an equiatomic alloy Ti-50.0 at.% Ni - range εt = 1215%; for Ti-50.7 at.% Ni.
Increasing The Strength Of Worn Parts Withcomposite Materials, Masud Numonzhonovich Masharipov, Shuhratbek Xabibullo Ogli Yuldashev
Increasing The Strength Of Worn Parts Withcomposite Materials, Masud Numonzhonovich Masharipov, Shuhratbek Xabibullo Ogli Yuldashev
Journal of Tashkent Institute of Railway Engineers
Researches are carried out on the built-up curly details. The aim of the study is to restore worn surfaces of parts by surfacing of powder composite materials. Inves-tigations are carried out to determine the composition, structure, hardness and wear resistance of the deposited layers. As a result of laboratory studies, the opti-mal composition of the surfacing material and the rational method of applying them to the worn surfaces of machine parts are selected.
Application Of Fiber Optical Sensors For The Account Of Axes Of The Mobile Composition Of Automatic And Telemechanical Systems On Railway Transport, Aziz Azimovich Saitov
Application Of Fiber Optical Sensors For The Account Of Axes Of The Mobile Composition Of Automatic And Telemechanical Systems On Railway Transport, Aziz Azimovich Saitov
Journal of Tashkent Institute of Railway Engineers
In this scientific work, modern optical sensors based on the use of modern electronic electromagnetic relay counters used on railways, stages and stations in the Republic of Uzbekistan are investigated and presented. The electromagnetic relay device ESSO increases the transmission of false messages under the influence of magnetic induc-tion. This leads to a decrease in the level of reliability. The study showed that the recommended axle counting sensors have high sensitivity when passing wheels on sensors on hauls and stations, which can increase reliability and reduce operating costs for train movements, trunk and station roads.
Application Of The Volterra Tray Model In Solving The Problems Of Optimizing The Supply Of Grain Elevators By Wagons, Nazirjhon Mukarramovich Aripov, Daurenbek Ixtiyarovich Ilesaliev
Application Of The Volterra Tray Model In Solving The Problems Of Optimizing The Supply Of Grain Elevators By Wagons, Nazirjhon Mukarramovich Aripov, Daurenbek Ixtiyarovich Ilesaliev
Journal of Tashkent Institute of Railway Engineers
Ensuring uniform supply of wagons for loading and unloading of goods is one of the main tasks of the transport process. Existing methods for solving the issues of ensuring the rhythmicity of the supply of wagons for loading grain often do not allow us to identify the causes of the technological shortage of wagons. In this regard, in the framework of this work, the aim of the study is to increase the efficiency of the organization of providing grain elevators with wagons using models.
Analysis Of Malfunctions Of Brake Equipment Of Freight Cars On The Angren-Pap Line, Yadgor Ozodovich Ruzmetov, Sardor Gafurjanovich Inagamov
Analysis Of Malfunctions Of Brake Equipment Of Freight Cars On The Angren-Pap Line, Yadgor Ozodovich Ruzmetov, Sardor Gafurjanovich Inagamov
Journal of Tashkent Institute of Railway Engineers
The article analyzes the failures of the braking equipment of freight cars operated on the Angren – Pap section of the “Uzbekistan temir yullari” railway. The electrified Angren – Pap railway line was built in order to create a new China-Central Asia-Europe railway corridor, as well as to form a unified railway network in Uzbekistan. It is an important link not only for Railways, but also for the entire economy of the Republic of Uzbekistan. One of the problems of exploitation that arise in the friction node of car part brake pads is high brake pad wear and temperature rise …
Improvement Of The Cooling System During Storage In The Process Of Agricultural Products, Jamshid Renatovich Kobulov, Jamshid Sayfullayevich Barotov, Diyor Shomurotovich Boboyev
Improvement Of The Cooling System During Storage In The Process Of Agricultural Products, Jamshid Renatovich Kobulov, Jamshid Sayfullayevich Barotov, Diyor Shomurotovich Boboyev
Journal of Tashkent Institute of Railway Engineers
The article outlines the optimal options for quality storage and product placement, from the acceptance of agricultural products to the delivery process. The factors that lead to natural losses and decomposition during cargo storage are identified and eliminated. In addition, the process of storing and delivering products is analyzed and proposals for addressing deficiencies in the existing logistics network are developed.
About Computer Simulation Of The Structure Of Cellular Concrete With A Tasked Heat Conductivity, Anvar Ishanovich Adilkhodjayev, S.S. Shaumarov, E.V. Shchipacheva
About Computer Simulation Of The Structure Of Cellular Concrete With A Tasked Heat Conductivity, Anvar Ishanovich Adilkhodjayev, S.S. Shaumarov, E.V. Shchipacheva
Journal of Tashkent Institute of Railway Engineers
This article presents the developed mathematical model of the structure of cellular concrete and its computer implementation in the form of a computational software package that allows you to determine pore sizes and characteristics of inter-pore walls, corresponding to the required thermal conductivity of the material. The stages of computer simulation of the macrostructure of cellular concrete are also given.
Calculation Of Hanging Shells Complex Geometry, Sayidmahsud Razzakov, Gennady Fridman, Rasul Khuzhakulov
Calculation Of Hanging Shells Complex Geometry, Sayidmahsud Razzakov, Gennady Fridman, Rasul Khuzhakulov
Journal of Tashkent Institute of Railway Engineers
A method for calculating large-span, spatial hanging shells is presented. A resolving system of equations is obtained for determining the stress-strain state of the hanging shells, the support contour, bearing and stabilizing cables
Plastometry Application For Control Of Portland Cement Consumer Properties, Aleksandr Petrovich Nikolaev, Elena Vladimirovna Kondrashchenko, Valery Іvanovich Kondrashchenko
Plastometry Application For Control Of Portland Cement Consumer Properties, Aleksandr Petrovich Nikolaev, Elena Vladimirovna Kondrashchenko, Valery Іvanovich Kondrashchenko
Journal of Tashkent Institute of Railway Engineers
It was shown that cements of the same strength grade substantially differ at initial dynamics of their interaction with water and structure-forming capacity din the course of stiffening. The necessity was substantiated for current control of Portland cement consumer properties in operation with cement from the same vendor. It was proved that the amount of added plasticizer for obtaining plastisized concrete on the basis of cements of the same strength grade from different vendors may differ several times. The efficiency was demonstrated of input control of Portland cement structure- forming capacity at plants manufacturing concrete and ferroconcrete products, using modified …
Effectiveness Of Seismic Base Isolation In Reinforced Concrete Multi-Storey Buildings, Ravshanbek Abdujabborovich Mavlonov, Sohiba Ergashboevna Numanova
Effectiveness Of Seismic Base Isolation In Reinforced Concrete Multi-Storey Buildings, Ravshanbek Abdujabborovich Mavlonov, Sohiba Ergashboevna Numanova
Journal of Tashkent Institute of Railway Engineers
The dynamic reaction of a building to earthquake ground motion is the most critical reason for earthquake actuated damage to structures. The basic concept in seismic isolation is to protect the structure from the damaging effects of an earthquake by introducing a flexible support isolating the building from the shaking ground. Seismic isolation consists of essentially the installation of mechanisms such as isolators which decouple the structure from base. In the present study, the seismic response of the reinforced concrete building, base isolated by lead rubber bearings (LRBs) is compared with the seismic response of the same structure which does …
Method Of Calendar Planning Of Construction Of The Complex At The Early Stage Of Design, M Mirakhmedov, M. Rasulmukhamedov, L.S. Yusupova
Method Of Calendar Planning Of Construction Of The Complex At The Early Stage Of Design, M Mirakhmedov, M. Rasulmukhamedov, L.S. Yusupova
Journal of Tashkent Institute of Railway Engineers
The construction schedule developed in the construction organization project does not meet the requirements of the reserve for construction, is not based on the choice of construction and technological schemes and the method of construction organization, therefore, it is not sufficiently reliable, the evidence base stored in the project archive is not confirmed by calculations and Therefore, it cannot be subjected to reliable examination. To eliminate this drawback, a technique is proposed that takes into account the lack of information. The methodology is based on the graphanalytic model of the flow organization of the construction of the complex, which allows …
Adhesion Strength Of Modified Plaster Solutions For Restoration Of Rchitectural Monuments Of Bukhara, M.M. Vaxitov, A.A. Tulaganov, I.I. Tojiev
Adhesion Strength Of Modified Plaster Solutions For Restoration Of Rchitectural Monuments Of Bukhara, M.M. Vaxitov, A.A. Tulaganov, I.I. Tojiev
Journal of Tashkent Institute of Railway Engineers
In this work, the strength of historical mortars of brickwork of the Ismail Somoni mausoleum, the monument of architecture of the Kalyan minaret, the building of the Abdulazizkhan madrasah and the mausoleum of Abdukholik Gizhduvani were determined, and the compressive, tensile, bending and adhesion strengths of the developed modified gypsum mortars for restoration of the above architectural monuments were studied. It is shown that the adhesion strengths of modified gypsum mortars also meet the requirements of KMK 2-01-03-96.
Formation Of A Calculation Model, Study Of Stress-Strain State And Vibrations Of Composite Shell Constructions From Composite Materials, A Abdusattarov, Z.Z. Ergashev, F.E. Abdukadirov
Formation Of A Calculation Model, Study Of Stress-Strain State And Vibrations Of Composite Shell Constructions From Composite Materials, A Abdusattarov, Z.Z. Ergashev, F.E. Abdukadirov
Journal of Tashkent Institute of Railway Engineers
The article gives geometric and physical relationships for shell and ring elements. At the same time, it is assumed that the physical properties of the material of the shell element are described by equations of a viscoelastic medium, taking into account the influence of damage accumulation. Using an approximate method, namely, the “freeze” procedure, a canonical system of equations is obtained - in the form of first-order differential equations with complex coefficients. To solve boundary value problems, the Godunov matrix sweep method is used.
Research Deplanacion Cross-Section, Related To Them Size Under Torsion Fluctuation, Muradov Rustam Muradov, Abduvakhidov Mutakhkhirkhon Abduvakhidov
Research Deplanacion Cross-Section, Related To Them Size Under Torsion Fluctuation, Muradov Rustam Muradov, Abduvakhidov Mutakhkhirkhon Abduvakhidov
Journal of Tashkent Institute of Railway Engineers
In this work, the problem of torsional vibrations of rotating working bodies in the form of shafts is studied in case of violation of the assumption of flat sections under torsional strains associated with the peculiarities of torsion deformation of relatively short bodies. During torsional deformation caused by torsional vibrations, the initially rectilinear generators of the cylindrical surfaces of the shaft turn into screw curves of equal length. This causes the longitudinal displacements of their points and, as a result, the appearance of two types of deplanation of its cross sections. The first type of deplanation is associated with the …
Technology For Preparing A Fiber Filler From Rice Straw And Analysis Of Its Interaction With A Modified Gypsum Matrix, Anvar Ishanovich Adilkhodjayev, B.G. Igamberdiev
Technology For Preparing A Fiber Filler From Rice Straw And Analysis Of Its Interaction With A Modified Gypsum Matrix, Anvar Ishanovich Adilkhodjayev, B.G. Igamberdiev
Journal of Tashkent Institute of Railway Engineers
The article presents research data on a composite material based on rice straw and construction gypsum. An overview of a method for preparing rice straw to increase the dispersion-reinforcing effect of the fiber filler is given. The results of the study of the synergistic effect of the “FremNanogis” modifying additive on the formation of the structure are presented.
Calculation Of Operational Suitability And Reliability Of Structures, Nodira Ziyayevna Saatova, Abdurakhman Asimovich Ishankhodjaev
Calculation Of Operational Suitability And Reliability Of Structures, Nodira Ziyayevna Saatova, Abdurakhman Asimovich Ishankhodjaev
Journal of Tashkent Institute of Railway Engineers
With the acquisition of independence of our Republic in the system of transport communications, great importance was attached to the qualitative improvement of the design, construction, and operation of aboveground structures. Many tasks have been performed to increase the reliability and strength analysis of these bridges. Along with these, improving methods for calculating the resource of artificial structures in the system of transport communications are required. The Strategy for the Further Development of the Republic of Uzbekistan, including the following tasks: "... implementation of targeted programs for the development and modernization of road transport, engineering, communication, and social infrastructures, ...". …
Estimation Of The Influence Of Cold Bridges On The Heat-Shielding Properties Of The External Walls Of Residential Buildings, Elena Vladimirovna Shchipacheva, Rakhmatullo Pirmatov, Makhina Turdalieva
Estimation Of The Influence Of Cold Bridges On The Heat-Shielding Properties Of The External Walls Of Residential Buildings, Elena Vladimirovna Shchipacheva, Rakhmatullo Pirmatov, Makhina Turdalieva
Journal of Tashkent Institute of Railway Engineers
Most of the existing multi-apartment residential buildings in Uzbekistan have external enclose structures with thermal performance that do not meet modern requirements. This is due to the design features of encloses in seismic areas of construction, necessarily including monolithic elements - anti-seismic belts, cores, frame elements and stiffeners. These elements, providing strength, rigidity and stability of structures, are at the same time powerful heat-conducting inclusions in warmer wall masonry materials. The article presents the results of theoretical and experimental studies on the estimation of the influence of cold bridges on the heat-shielding properties of external heat-technical inhomogeneous walls of civil …