bluuebunny/crossref_metadata_2025_split huggingface dataset:
The rolling simulation for cold work metal hardening
Authors: Urazov V , Danilov A D , Yu Gusev K , Yu Gusev P , Meshkov D N 
Published: November 2021

Abstract
This article describes the results of a calculation and experimental analysis of destructive physical phenomena that appear in critical sections of industrial and power-related equipment, and lead to occurrence of various operational damages. It was shown that pipeline welded connections are the sections most prone to crack development, therefore the traditional strength calculations need to be combined with fracture mechanics criteria and thorough materials analysis of flawing and structural imperfection. The cold work hardening technique was proposed as a solution for the problem of critical sections performance property restoration. The technique uses surface plastic deformation phenomenon to change the material’s throughthickness stress distribution. In order to optimise surface hardening for welded connections prone to defect formation, we proposed a simulation for analysing an actual pipeline sections load. To assess the applicability of the simulation results, the cold work hardening technique was developed and introduced using a full-scale test sample for damaged areas of welded connections in ø426×40 vent pipes at Novovoronezh NPP Unit No.5.
Cultivator points of the rotary tillage loosening and separating machine of the stratifier
Authors: Syromyatnikov Y N , Orekhovskaya A A , Dzjasheev A-M S , Kalimullin M N , Tikhonov E A , Luchinovich A A , Bielykh A V 
Published: November 2021

Abstract
The object of the study is the process of functioning of the working bodies of a rotary tillage machine, with the help of which the lifting and feeding of the soil cut by them to the loosening and separating device is carried out. The technological process of the machine operation is described with the cultivator points from the chisel working body installed in the front part of the pointed paw, which are located at an angle of 260 to the horizon and properly ensure the penetration of the working bodies into the soil. Using the method of variational calcification, the form of the minimum traction resistance cultivator points for lifting and feeding the soil to the loosening and separating device is justified. It was experimentally determined that a cultivator points with a theoretically justified profile has a traction resistance 38.7% less than a cultivator points with a straight profile. The relevance of the study is to ensure the minimum traction resistance of the working bodies for cutting and lifting the soil of a rotary tillage machine, which will make it possible to reduce energy costs for pre-sowing tillage. The target group of consumers of information in the article is designers, specialists engaged in the development of tillage machines.
Modeling of the process of safe functioning of a mechanized feed production complex
Authors: Chepelev N I , Cherkasova N G , Maslova T V 
Published: November 2021

Abstract
The article deals with the concept of the safe production process of forage by improving the means of mechanization in order to reduce injuries to workers and improve working conditions. A modern feed mill is an industrial complex and is quite specific, characterized by the peculiarities of the developing the factors that affect the health of workers, as well as the nature and level of their morbidity. Sources of hazards are power plants (transformers, electric motors, distribution panels and points, compressor stations, boiler plants, etc.), a significant number of various technological, transport and auxiliary equipment; mobile and self-propelled means of mechanization. A large number of different types of raw materials, often with specific properties, finely dispersed, with tendency to caking, dust releasing, pass through the communications of the enterprise, are stored in silos, bunkers, floor-type warehouses. With the effective implementation of the developed model, the process becomes explosion and fire safe, safe for the environment and comfortable during operation.
Improving stability of movement of machine section for soil preparation and seeding
Authors: Syromyatnikov Y N , Orekhovskaya A A , Dzjasheev A-M S , Tikhonov E A , Kalimullin M N , Ivanov A A , Sokolova V A 
Published: November 2021

Abstract
The subject research is operation of a combined machine for soil preparation and seeding of sunflower and corn seeds. Technological process of machine operation with installed guides, passive rotating flat discs with flanges (which properly ensure movement of soil along the plough share to loosening-separating device), a sowing device, a seed tube, a furrow former, a rotor, a separating grid, a parallelogram mechanism, a spring, a share is described. Dynamic prerequisites for increasing uniformity of depth of groove formation and seed placement in depth in soil are considered. Values of length of links of parallelogram mechanism, initial angle of their installation and stiffness of spring, values of deviations of combined machine section from given depth of movement of plough share are determined. It is proved that with an increase in length of levers of parallelogram mechanism, maximum deviations of section increase. An increase in initial angle of inclination of levers of parallelogram mechanism causes an increase in maximum deflections. As spring stiffness increases, maximum deflections decrease. Relevance of study lies in ensuring stability of copying soil surface by working bodies of combined machine while depth of seeding remains unchanged along entire length of movement, which will make it possible to increase movement speed and unit width. Target group of consumers of information in the article - designers, specialists involved in development of tillage machines.
The method of expert assessments as applied to the ranking of technical solutions in the design of a tractor gearbox
Authors: Yu Dobretsov R , Dobretsova S B , Troyanovskaya I P , Tikhonov E A , Nuretdinov D I 
Published: November 2021

Abstract
The purpose of this work is to select a rational concept of the transmission of the tractor being created on the basis of an objective quantitative comprehensive assessment of the considered possible design options. The object of research is the transmission of wheeled tractors of 4 and 6-8 traction classes and forest machines based on their chassis. Making a decision on the principles of building a transmission is an important stage that requires a proper analysis of known theoretical developments, production experience, competitors’ achievements, market conditions and other factors. The decision is based on the ranking of the options available for implementation of the object. It is advisable to support such a ranking with the results of an objective quantitative comprehensive assessment of the compared options. The key points in this case are the formation of a nomenclature of objective private performance indicators and the choice of a data processing method. The paper considers the issue of applying the method of expert assessments when choosing the concept of constructing a transmission and the type of transforming mechanism of a tractor. The algorithm of the method, initial data, and evaluation results are presented. The main solutions for the construction of the transmission of tractors of 4 and 6-8 traction classes have been formulated.
On the assessment of the potential for extracting information on defects in the main pipeline by the method of radar analysis of natural oscillation frequency
Authors: Maykov O A , Kokhonkova E A , Baturin T N 
Published: November 2021

Abstract
The paper deals with the issue of diagnostics of main pipelines by the vibration method, exploring the influence of the formation of cracks in the walls of the pipeline on the change in the frequency characteristics of the pipeline. By analyzing the difference in the natural oscillation frequency of a pipe with a crack and without it, it is possible to assess the location of the defect with a certain accuracy. The issue of the possibility of reading the natural oscillations of the main pipeline from the surface of the soil located above the pipeline is also being studied.
Research of the influence of acoustic load on a piezoelectric emitter to control the cavitation erosion of materials
Authors: Khmelev V N , Barsukov R V , Barsukov A R 
Published: November 2021

Abstract
The paper analyzes the possibilities of research the cavitation erosion of materials that are subjected to cavitation effect. The study is carried out by a system for controlling the magnitude of the acoustic load on the piezoelectric emitter of the ultrasonic vibrating system. The analysis of the processes of interaction between the ultrasonic emitter and the processed environment was carried out on the basis of a research of the model, which was created on the basis of a system of electromechanical analogies. The analysis made it possible to reveal the dependence of the electrical impedance of the ultrasonic vibrating system on the magnitude of the acoustic load. The revealed dependencies made it possible to propose and develop a control system. It is able to provide a study of the properties that are located near the emitting surface of the ultrasonic emitter of materials influenced to cavitation ultrasonic, including under abnormal conditions (high temperatures and pressures).
Investigation synchronous planning methods efficiency in small-batch make-to-order production
Authors: Noskova E E , Kapulin D V , Russkikh P A 
Published: November 2021

Abstract
Lack of effective planning methods is one of the reasons for uneven use of production capacity, the occurrence of unplanned downtime and various types of losses. Small-scale make-to-order productions are characterized by weak workplaces specialization, by the versatility of the equipment used with a wide range of used components. They differ in the presence of repeated processing of part at the same workplaces and in occurrence of “a return flow” in a production system. The article discusses the features of planning due to technological specifics in such enterprises and a significant number of applicable incoming nomenclature items. Existing systems of production planning such Manufacturing Execution System and Advanced Planning & Scheduling System are compared, variants of their algorithmic implementation are proposed. The authors investigated the effectiveness of the application of the developed algorithms for different planning levels - interdepartmental and shop, depending of the size of order book and number of technological operations. The analysis of the conducted research allows us to assert that to provide synchronous scheduling in make-to-order small-scale productions it is necessary to apply combined planning approach using APS-and MES-technologies together.
Stress-strain state assessment capacitive apparatus taking into account impact piping for connectors
Authors: Zakirnichnaya M M , Rubtsov A V , Dementev V A , Kh Gabbasova A , Arkhipova K S 
Published: November 2021

Abstract
Capacitive equipment in oil refining and petrochemical processes belongs to one of the most significant and responsible groups of process equipment of hazardous production facilities. Having various purposes, an impressive part of the process vessels is operated at increased pressures and temperatures under conditions of corrosion-erosion wear. Therefore, capacitive equipment must meet all the necessary requirements in the field of reliability and industrial safety. Depending on the effect of various operational loads and other factors, the distribution of the stress-strain state of the equipment elements can vary according to various scenarios depending on the determining parameter of the technical state and the dominant damage mechanism. One such factor may be the loads on the nozzles from process pipelines. The geometry features and various operational parameters of the piping can have a significant effect on the formation of the stress-strain state of the vessel and the distribution of areas of concentration of increased stresses. In the future, defects of various levels may occur in these zones. In this regard, the work on the study of the stress-strain state of the vessel is relevant, taking into account the loads that pipelines from the process piping exert on the nozzles.
Control, computing and communication in industrial cyberphysical systems with feedback
Authors: Shukalov A V , Zakoldaev D A , Zharinov I O , Zharinov O O 
Published: November 2021

Abstract
The cyber-physical production base technologies are control, computing and connection being applied altogether in the industrial object technological processes automatic regulation systems. They use control technologies in multi-loops and multi-channel regulation systems forming a hierarchy structure. Automatics functional elements unite in the intermediary regulation scheme stabilizing hierarchy control objects, which states are detected with sensors. Computing technologies are used in the cyber-physical production imitation virtual environment and provide processes simulation based on control models and cyber-physical systems digital twins structured in hierarchy levels. The regulation accuracy increase is provided with physical and model processes results comparison detecting non-definition factors acting production processes accuracy. The communication technology is used for the cyber-physical systems net information exchange given with the Internet of Things parameters. The cyber-physical systems continuous work in the non-ideal communication net regulation interval is provided with preventive control signals compensating operation and information delay of automatic conveyor lines. There is a scheme given of multi-loop and multi-channel automatic cyber-physical production using control objects hierarchy based on cyber-physical systems hierarchy and item manufacturing technological tasks.
Improving the antifriction properties of the housing-rotor coupling in axial turbomachines
Authors: Alisin V V 
Published: November 2021

Abstract
The article discusses the frictional interaction of carbon-carbon composite material on steel. Antifriction properties and wear resistance of the material under dry friction at speeds up to 100 m/s are investigated. The effect of velocity and contact pressure on the friction coefficient and wear resistance of a carbon composite is analyzed. The regularities of the change in the coefficient of friction are determined depending on the load-speed factors. The assumption is substantiated that the high thermal stability of the carbon composite, its low hardness, good antifriction properties and high wear resistance allow the material to be used in friction units operating at very high speeds and temperatures. In order to improve the reliability and reduce gas flows in axial turbomachines, on the basis of the study carried out, it is recommended that instead of heat-resistant coatings, a lining of the gas duct casing should be made of carbon composite.
Impact of the electromagnetic field pressure on the bending of high convex-side
Authors: Kurlaev N V , Ahmed Soliman M E 
Published: November 2021

Abstract
A large number of aircraft parts made of sheet materials are used as flanges, common to such parts is the presence of walls, sides, and various elements that increase rigidity and reduce mass. These sheet parts are complex, mostly closed forms, which by plastic deformation methods require a rather complex stamping tools. Technological methods of manufacturing have certain disadvantages associated with the need to refine the shaping. In addition, the frequent updating of product designs and their constant improvement with a significant amount of experimental and small-scale production required the creation of technological methods that provide a significant reduction in terms of preparation. When punching sheet metal parts, in particular, by the pressure of magnetic-pulse field, the accuracy of shaping is mainly influenced by the shape of the flange in the process of deformation. At the final stage of shaping, an impact contact occurs between the flange of the part with the die or form-block. On impact, elastic unloading of the flange occurs due to the removal of inertial tensile stresses along the generatrix. After the impact contact, dynamic springing or rebound of the flange occurs.
Results of flaw detection of parts of the «shaft - pinion bushing» connection of agricultural machinery reducers
Authors: Zh Shkaruba N , Leonov O A 
Published: November 2021

Abstract
The article has devoted to solving an urgent problem related to the fault detection of the main parts of gearboxes. A study of the dimensions of new and worn parts, forming the connection «shaft - pinion bushing» Ø4ON7/k6 in the gearboxes of agricultural machines had carried out. It was found that the defect in size is 12.45 %, and the defect in shaft size is 8.69 %. It had found that the greatest wear of the holes when reaching 0.082 mm, about 19 % of the gears must be replaced due to the excess of the inner diameter, the shafts wear up to 0.12 mm and about 23 % of the shafts have rejected. It has shown that a transitional fit is assigned in the new joint, as evidenced by the presence of both clearances and interferences, and interferences predominate. The defect to the left of the span of a fit is 0.91 % and to the right is 0.47 %. This indicates that all new holes and shafts can be allowed for assembly, including those provided by defect, but as a result, there will be practically no defect in the joints. When joints have formed from worn parts, above 25 % of rejects at the maximum clearance, therefore, flaw detection and complete control in this case are necessary.
Influence of the electromagnetic field pressure on the free bending of the straight side
Authors: Kurlaev N V , Ahmed Soliman M E 
Published: November 2021

Abstract
Bending is the operation of forming or changing the angles between the parts of the workpiece or giving it a curved shape and in the mean time is the most difficult and timeconsuming operation of the technological process of manufacturing parts from profiles. Aircraft bending parts of the following nomenclature are obtained as profiles: frames, ribs, stringers, linings and brackets. Profile parts are responsible for their intended purpose; therefore, high requirements are placed on the accuracy of their dimensions and the preservation of the crosssection shape. The process of bending profiles has its own characteristics, which are due to the shape of the profile section; the first feature is the presence of vertical shelves, significantly loaded and deformed due to large distances from the neutral axis of the bent section, the second is the mismatch of the bending plane with the main axes of inertia of the section, which causes oblique bending and twisting of the part. When analyzing the bending process of extruded profiles, it should be borne in mind that the neutral layer of the workpiece coincides with the line that passes through the centers of gravity of the sections. When using the hypothesis of planar sections of the plot of deformations and stresses in the stretched and compressed zones do not have a mutually reflected form. It is very important how the profile is oriented in the bending plane. Different orientation of the profile, even the simplest cross-section (for example, angular), gives a qualitatively different picture of the deformed state.
Dependence of the spectral components of the stator current on damage in the electric motor
Authors: Charikov P N , Afanasenko A G 
Published: November 2021

Abstract
Safety and fail-safety of production processes largely depend on the technical condition of machine assemblies that play a key role in production. The main drive mechanism of machine assemblies is an asynchronous electric drive with a squirrel-cage rotor. Damage to any part of the electric motor reduces the performance and service life of the machine. Malfunctions resulting from normal wear and tear, errors in maintenance and design, harmful environmental influences and other factors must be identified and eliminated in a timely manner. In this regard, the analysis of the condition of the electric motor and the prediction of damage plays a major role in increasing the reliability and increasing the service life of the equipment. This article will consider the regularities of the spectral components of the stator current of an electric motor from the mode of failure.
Testing the magnetoactive elastomer sample for compression with the test machine
Authors: Minaev Andrey 
Published: November 2021

Abstract
A sample of a magnetoactive silicone composite with ferromagnetic fillers is examined on a testing machine. The dependences of the change in the values of the moduli of longitudinal elasticity on deformation are plotted for various modes of compression of the sample. The characteristics of the linear and nonlinear dynamics of changes in the moduli of longitudinal elasticity are given as a function of the magnitudes of the deformations of the material during compression. Within the limits of deformation of the sample, which is 24% of its height, the moduli of longitudinal elasticity are linear. The nonlinear nature of the change in the compression modulus occurs when the sample is deformed over 40%. When the compression ratio of the sample was up to 72%, the compression modulus increased by a factor of 9 without the action of a magnetic field and by a factor of 22 under the action of a magnetic field. The influence of the magnetic field on the growth of the compression moduli with the increase in the compression force ranges is shown. The property of the material to self-healing (“shape memory”) was established after testing in the mode of maximum compression of ultimate loads.
Optimization problem of external dynamic influences for the elimination of vibration phenomena in composite elastic building structures
Authors: Provotorov V V , Lebedeva Y O , Tran D , Borisoglebskaya L N , Vorobyov E I 
Published: November 2021

Abstract
The paper considers the actual task of construction engineering: the elimination of harmful (undesirable) vibration phenomena in composite metal building structures and bridge cable-stayed systems – complete damping and vibration of the bridge cable-stayed system entails the calming of the entire bridge structure. Similar problems arise when designing devices that lead to dynamic rest of network antenna structures. The presentation of the material is based on the main provisions of the modern theory of optimal control of distributed differential systems with network carriers. An extensive literature is devoted to the sanctification of the research of the mentioned problem, however, an exhaustive solution of the problems of controlling elastic structures by external influences of various types (distributed, boundary, starting, and point control) and a comparative analysis of their properties did not find their place in these studies. In addition, the ways of algorithmization of previously obtained results are not always specified. The paper uses a mathematical model describing small oscillations of a spatial string system. It is convenient to use such a system and approaches to the analysis of its mathematical model as a fairly simple fundamental object when considering a more complex object, which is an elastic system of more complex elements. The results of the work are presented in a form that makes it possible to formalize the computational procedure, which is convenient for algorithmizing the process of determining the solution, and therefore for the modern application of computer technology. It remains to add that the work indicates ways to transfer the obtained results to the case of analyzing optimal control problems with carriers on multidimensional network-like domains.