bluuebunny/crossref_metadata_2025 huggingface dataset:
Numeric simulation of aircraft engine parts additive manufacturing process
Authors: Maksimov Peter , Smetannıkov Oleg , Dubrovskaya Aleksandra , Dongauzer Konstantin , Bushuev Leonid
Published: October 2018

This paper presents the results of software (ANSYS software) improvements specific for modeling the physical process of SLM (Selective Laser Melting). Improvement goal was to create a set of mathematical models and user environment (a set of APDL programs) based on the ANSYS finite element analysis system solver, allowing to perform the technological procedure of physical SLM process numerical modeling to the required degree of precision with an estimate of the final distortion and residual stresses of gas turbine engine parts to optimize the manufacturing process.
Calculation of linear technological dimensions with adaptation
Authors: Masyagin Vasily , Bazhenov Ruslan , Artyukh Roman
Published: October 2018

Technological dimensional calculations are a necessary stage of engineering process and allow to determine machining allowance. The problem is that, when processing hard-to-treat materials on NC machines, it is necessary to provide optimal processing conditions for each workpiece based on reliable information on allowances at each operation. However, according to the existing methodology for calculation of technological dimensions and, accordingly, allowances, for the hypothetical workpiece with wide dimensional tolerances the technological dimensions and allowances are determined once, while it is assumed that the specific workpiece must engage with the tolerances of the hypothetical workpiece. The article deals with an example of calculating linear technological dimensions with adaptation, based on the results of monitoring and performing a separate calculation of the dimensions and allowances for each concrete workpiece in each operation. The calculation is carried out using a processing scheme, a graph, equations of dimensional chains and a computer program. As a result of the study, it was found that the calculation of linear technological dimensions with adaptation makes it possible to determine the actual values of allowances at each transition and thereby ensure predictable processing conditions.
Numerical modeling of automated tape placement process of unidirectional thermoplastic
Authors: Anoshkin Aleksandr N. , Pisarev Pavel V. , Kirova Yulia S.
Published: October 2018

Within the framework of the present work, studies are being carried out to select the tooling material for the automated placement of the thermoplastic prepreg. A mathematical model of the heating of the tooling and a thermoplastic prepreg tape with an automated placement of the prepreg on the mandrel is developed. In the framework of numerical experiments, two rigs made of steel and carbon fiber were considered. Based on the results of numerical experiments, the temperature field distributions in the laid out part and in the tooling were obtained. The analysis of the obtained results revealed that when using metal tools, a considerable heat removal from the heated layers of the thermoplastic is observed, which can significantly influence the crystallization process of the thermoplastic. Also on the carbon-fiber tooling, the laser warming spot is more localized than in the metallic one. On the basis of the data obtained, the linear deformation of the rigging was calculated, it was found that the maximum deformations in the steel tooling are three times higher than the maximum deformations in the carbon fiber. It is determined that when using metal equipment, a significant heat removal from the heated layers of the thermoplastic is observed.
Model of control over cutting tool demand in a machining shop
Authors: Lutoshkin Igor , Madanov Aleksandr , Polyanskov Yury
Published: October 2018

The article proposes an optimization model of control over cutting tool demand in a machining shop. The model is based on application of one of the optimization problems, which occur at an enterprise depending on its current requirements: minimization of time and financial costs, and with convolution of these criteria. Furthermore, the work describes a software program used for calculation of required quantity of cutting tools necessary for meeting of production targets.
Automated block-by-block correction of milling parameters by means of numerical simulation
Authors: Kiselev Igor , Jukov Nikita , Deev Konstantin
Published: October 2018

The methodology of the block-by-block correction of feed during the multi-axis milling process using the criterion based on the calculation of local maxima of the cut-off thickness, which is calculated instantly along the cutting edges, has been introduced in this paper. This correction is carried out using numerical simulation, which is based on the depth buffer and special geometric algorithm. The example of heavy stock removal cycle optimization during three-axis milling of figurine-shaped surface has been given also. This example demonstrates that peak loads on the tool has decreased, whereas the process efficiency has improved by more than one third.
Development of machine-building enterprises controlling
Authors: Mavlioutov Ramil , Chubenko Olga
Published: October 2018

The article is devoted to the formation of controlling at the machine-building enterprises of Russia. The author’s interpretation of the concept of controlling as management of an enterprise is given. Controlling allows to provide an organizational and information basis for making managerial decisions aimed at the effective development of an enterprise in the conditions of dynamically changing factors of the external and internal environment. The necessity of introduction of controlling at machine-building enterprises is justified; the effects of controlling are given. Finally, methods for assessing the economic feasibility of introducing controlling at machine-building enterprises are given.
Effect of electrode polarity on fatigue life in EDM
Authors: Özerkan Hacı Bekir
Published: October 2018

In this study, high manganese steel specimens were machined with graphite electrode and various processing parameters by electro erosion method. It is a known fact that the craters generated by the EDM have a notch effect on the fatigue life. Therefore, Rz and Sm roughness parameters are calculated as the roughness maximum crater depth and width, respectively, and the theoretical fatigue life calculations are performed on the treated surfaces. In the processes, the tool polarization was also changed and the measured roughness values were higher in the positive polarity, so that the fatigue limit life was reduced in the calculations made with the area1/2 model. In EDM, when using a graphite electrode, in the case of reverse polarity machining, the surface roughness has an effect on increasing the fatigue life.
Ensuring the quality of the machined holes during the hole truing and reaming on lathe machines
Authors: Aliev Aziz
Published: October 2018

The article is devoted to studying of the influence of cutting liquids, including those of plant origin, on the roughness of the treated surface during the reaming and deployment in details of titanium alloy, structural and corrosion-resistant steels. The relationships between the characteristics of the adhesive interaction of the tool and the processed materials and the length of the contact area of the tool with the workpiece and heat in the cutting zone are determined. The effectiveness of plant-origin cutting liquids is shown in comparison with conventional oils under conditions of the pronounced adhesive wear.
Comprehensive ensuring of quality of surfaces of details at centrifugal-planetary volume processing
Authors: Zverovshchikov Alexander , Zverovshchikov Vladimir , Nesterov Sergey
Published: October 2018

The results of the system analysis of the set of input factors of the volumetric centrifugal-planetary processing, allowing to implement a comprehensive approach to the provision of quality processing parameters, are considered. A sequence of modeling processes ensuring the quality of surfaces during bulk processing is given. The results of modeling the contact of an abrasive working body with the surface of a workpiece with a microrelief are shown. The factors determining the stability of reliable achievement of qualitative indicators are noted. A dependence has been developed to determine the parameter of the surface roughness to be reduced, based on the results of modeling the contact between the surfaces of the working fluid and the workpiece by the finite element method. The experience of designing volumetric centrifugal processing operations on the basis of modeling is generalized. Methodical methods of technological preparation of manufacture for volumetric processing are offered.
Porosity of products from electroerosive cobalt-chromum powders, obtained by additive technologies
Authors: Ageev Evgeny , Altukhov Alexandr , Novikov Alexandr
Published: October 2018

The wide use of the EED method for processing metal waste into powders for the purpose of their reuse and application in additive technologies is hampered by the lack in the scientific and technical literature of full-fledged information on the effect of the initial composition, regimes and media on the properties of powders and technologies of practical application. Therefore, in order to develop technologies for the reuse of electroerosive powders and to evaluate the effectiveness of their use, complex theoretical and experimental studies are required. The purpose of this work is the study of the porosity of additive products from electroerosive cobalt-chrome powders. For the implementation of the planned studies, wastes of the cobalt-chrome alloy of the brand KHMS “CELLIT” were chosen. As a working fluid, butanol (butanol-1) was used. For the production of cobalt-chrome powders, a unit for EED of conductive materials was used. Dispersion parameters: voltage 100 V, capacity 48 μF, repetition rate 120 Hz. Therefore, two or more pores because of the absence on the thin section of the visible boundary of their division can be fixed as one large. In addition, the method gives the distribution of pores in one plane of the sample, where narrow and wide sections of the sample fall, while in the hydrostatic weighing method and mercury porosimetry the pore sizes are fixed at their narrowest cross section. A consequence of these factors is the displacement of the function and distribution in the region of large pores. The porosity was determined using an Olympus GX51 optical inverted microscope with software for quantitative image analysis. Prepared samples had no traces of grinding, polishing or dying of structural components. Based on the results of conducted studies of the porosity of additive products from electroerosive cobalt-chrome powders, it has been experimentally established that the porosity does not exceed 1,06%.
Determining deviations of output variables from forecast values in system for monitoring external round grinding process
Authors: Yagyaev Elmar
Published: October 2018

The article considers the estimability of the deviations of actual output variable values from the forecast ones in the system for monitoring the process of external round grinding. The author proposes the method for determining the deviations and establishing their most probable values as well as for establishing the cause of such output variable value deviations and technological system changes. It is substantiated that the determination of the output variable deviations and the parameters of the technological system state is possible at the control of the output variable change rate as the interruption time intervals are different for different subsystems. The authors managed to determine the dependences of the deviations of actual values (t) from the estimated ones yр(t). To resolve the objective of identifying the causes of output value deviations from the forecast ones, the authors applied the method for determining the indirect measurement errors. The obtained dependences made the authors draw the conclusion that at the control of the change rate of output variable values one is able to find out the disturbance type and the type of the deviation of output variable actual values in the technical system. This provides for the opportunity to correct the control of the external round grinding process as well as to calculate the time intervals at which one needs to take into account some or other changes in the technological system.
Decomposition of milling operation
Authors: Novoselov Yurij , Piankovskaya Mariya , Bogutsky Vladimir
Published: October 2018

The article deals with the problem of improving the stability of quality parameters in the milling of molds, which provides for minimizing deviations from the set values that meet the requirements of the product drawing. For this purpose, a block diagram of the milling operation was developed and decomposition was carried out, which allowed to identify such subsystems, “workpiece”, “machine — tool”, “tool”, “contact zone”. The factors that lead to a decrease in the parameters of the quality of the surfaces of the workpiece are determined. The developed block diagram allowed to establish the relationship between the main components of the technological system and the characteristics of the machining process.
Research and development of decision-making methods for creating 3d objects in mechanical engineering
Authors: Kumaritov Alan , Sokolova Ekaterina
Published: October 2018

The analysis of the criterion of integral proximity of a clear / fuzzy truth value to the value of absolute truth is carried out in this work. Confirmation of the possibility of using algorithms to create three-dimensional objects in engineering.
Control system for electrohydraulic drive of a mobile sinking hoisting plant
Authors: Kurochkin Anton , Vagin Vladimir , Karpesh Anton , Dyorina Natalja
Published: October 2018

The article presents the results of the control system development for the electro hydraulic drive of a mobile sinking hoisting plant. Increasing the technical performance of mobile sinking hoisting plants is possible by increasing their productivity, reducing their massiveness and increasing the durability of tractional organs and a number of units and parts of lifting machines. However, the increase in productivity, in its turn, causes the need to increase the suspended load on the traction organs, which causes a significant increase of the dynamic loads in the elastic elements in the transient operation modes of the hoisting plant. One of the ways to reduce constantly acting dynamic loads of vibration character is the use of a gearless hydraulic drive with damping properties. But, nevertheless, the hydraulic drive possibilities are limited for large vibration amplitudes of dynamic forces. The damping properties of the hydraulic drive can be increased by using control system, which allows realizing effective control of the electro hydraulic drive of the hoisting plant.
Stability of a mine excavator with a variable cab position
Authors: Velikanov Vladimir , Dyorina Natalja , Panfilova Olga
Published: October 2018

The publication deals with the problem of assessing the mining excavator stability with a variable cab position. It is determined that the efficiency of the excavator cycle operations largely depends on the position of the operator with respect to the boom and body, the glazing area of the cabin, the dimensions of the windows, the width and the number of jumpers. A technical solution is proposed to increase the visibility of mining excavators’ cabs. The design of the mechanism makes it possible to advance the efficiency of using quarry excavators by changing the position of the cabin both in the vertical plane and in the horizontal one. Counterweight mass, an assessment of the turntable equilibrium and the stability of a mining excavator with a variable cab position are performed using standard «MS Excel» tools.
Ultrasonic flaw detection capabilities at first stage of technological process of ship engine overhaul
Authors: Ilyakhinskiy Alexander , Rodyushkin Vladimir , Berezin Evgeniy
Published: October 2018

The technological process of ship engine overhaul begins with dismantling, while the obligatory operation is flaw detection of parts. The flaw detection at this stage involves certain difficulties due to the fact that the entire repair process takes place directly onboard the ship. It is possible to simplify the task of assessing the technical condition of a particular part, if one can assess the performance of this part before dismantling, saving both material assets and time. However, in vessel design, the equipment developers do not pay due attention to ensuring its controllability. The article describes capabilities of ultrasonic flaw detection that can be realized in ship conditions during the first stage of the ship engine overhaul technological process. The ultrasonic technique for estimation of a crank-shaft metal damage through scavenging ports of the ship engine is discussed; as well as an option to address the issue of repair or replacement of tap bolts according to their actual technical condition.The described capabilities are due to the uniqueness of ultrasonic flaw detection: the internal space of almost all structural materials can be “observed” by waves of a mechanical nature. Elastic waves, probing the metal, react to all the processes occurring in it, they perform the functions of a universal sensor that delivers information about the controlled environment. They allow to recognize an early stage of defect accumulation – micro damage formation, which is quite natural, since the parameters of elastic waves depend on the density, moduli of elasticity, size and geometry of structural inhomogeneities and other characteristics of the test medium.
Coefficients determination of fuzzy products rules in a fuzzy model for excavators’ ergonomics estimation
Authors: Velikanov Vladimir , Dyorina Natalja , Usov Igor , Usov Igor
Published: October 2018

The article substantiates the necessity of setting the coefficient of determination for each of the sub-clauses when creating a rule base that takes into account the degree of influence of ergonomic properties in the study on the integrated assessment of the mine excavators’ ergonomics. A generally accepted scheme of ergonomic properties of mine excavators is performed, the weight coefficients of each of the properties are determined using the paired-comparison method. A fuzzy model has been implemented that allows determining the resulting level of ergonomics of the mine excavator cabs due to more precise adjustment of the input variables of the model.
Optimization of reactive power consumption regimes by the electric centrifugal pumps installations
Authors: Kopyrin Vladimir , Smirnov Oleg , Deneko Marina
Published: October 2018

The purpose of the article is to determine the optimal parameters inside the downhole compensator of the reactive power at which minimization consumption of active power is provided. The energy-saving function for electric effect estimating with the use of the downhole compensator is propoused. Surfacing energy-saving functions are received. Their analysis showed that minimal consumption of the submerged motor reactive power is achieved by tre power of inside downhole compensator 0.92 with the submersible motor power.
Research on optical flat models of stresses in the crankpin of internal combustion engine
Authors: Zhed Olga , Kopylov Vladimir , Koshelenko Adolf
Published: October 2018

The intensity of the contour strains of the oil channel is determined by the method of photomechanics in the consequence of the loads of the crankpin in the working cycle of the internal combustion engine. The studies have made it possible to establish the qualitative and quantitative composition of the stresses on the hole contour of the oil channel against deformation of the bending and torsion of its connecting rod.
The influence of technology transfer on the formation of the innovative potential of the machine-building industry
Authors: Vorontsova Olga , Savon Igor , Gritzunova Svetlana
Published: October 2018

The article attempts to substantiate the role of technology transfer in the process of formation of competitive advantages of Russia in international markets. The prospects of using the transfer of foreign technologies as a measure for the formation of the innovative economy of Russia and its regions are considered. One of such prospects is the solution of the problem of import substitution and development of own scientific and technical projects.
Investigation of the process of controlled starting of the open-pit locomotive for ensuring the maximum adhesion coefficient at the starting
Authors: Keropyan Ambartsum , Babichev Yuriy , Sizin Pavel
Published: October 2018

In order to control the calculated coefficient of adhesion of the locomotive bandages with the rail, a controlled starting of the career locomotive is suggested, in which the relative traction coefficient varies over the time according to the exponential dependence. To realize a rational starting process the tractive effort during the ¼ of the starting period should be ¾ of the maximum which is recommended by the traction conditions for a given section of the track, and for the remaining time, i.e. in the interval of the subsequent three-fourths of the starting time, the tractive effort must be smoothly brought to the required level, acceleration during the same period must also be changed (decreased) and at the end of the starting process, when the train reaches the working speed at this track section, it must be made equal to zero. It is proposed a relationship for determining of the starting time of the locomotive, depending on the initial parameters and actual operating conditions, which makes it possible to develop technical requirements for the automatic launch system of a open pit locomotive, which ensure the implementation of the maximum possible values of adhesion coefficients closed to optimal after the starting process.
Research of heat stresses in components of blast furnace tuyere
Authors: Tarasov Yuriy , Radyuk Alexandr , Gorbatyuk Sergey
Published: October 2018

Using computer simulating in Deform 2D it was researched the effect of insert thickness and air gap size, separating it from the internal cylinder, on temperature pattern and stresses in the insert and the internal cylinder. It was shown, that with the increase a clearance between the insert and the internal cylinder and with increase the insert thickness, weight average values of voltage decrease in it. They have been more evenly spread with increases of insert thickness. In tuyere design it was offered increasing it thickness to 13 mm for hardening. Key words: tuyere, blast furnace, insulation insert, internal cylinder, temperature pattern, stress.
Stabilization of transport tracked vehicle trajectory
Authors: Taratorkin Igor , Derzhanskii Victor , Volkov Alexander
Published: October 2018

The article presents the research findings of the controlled motion dynamics of tracked vehicles equipped with a steering system with discrete properties. It is established that the potential high-speed performance is limited by motion instability and by dynamic properties i.e. the phase lag of the vehicle response to the harmonic control input and the “engine overshoot” to a unit step function (steering jerk). Technical proposals allowing for the high-speed performance of the vehicle are substantiated, such as yaw moment control, which ensures the positive-difference of the partial differential coefficients of yaw moment and cornering resistance moment with respect to curvature; increase of the dynamic system stiffness for increasing the natural frequency and decreasing energy when exciting oscillatory processes; implementation of Shaper steering brake control algorithms.
Analysis viscoelastic properties of fiber-reinforced composite spring for the all-terrain vehicle
Authors: Evseev Kirill B. , Kartashov Aleksander B. , Dashtiev Idris Z. , Pozdeev Aleksey V.
Published: October 2018

For today’s composite materials have many advantages over steel materials. The composite materials take the main part in modern automobile constructions. Suspension system is the main automobile part. Components of suspension system are made of metal. Therefor suspension system have a high weight that have a negative effect for all of vehicle especially for vehicle dynamics and stability properties. The main part of suspension system is a spring element. Coil springs are the most widely used spring type for independent wheel suspension for trucks and passengers vehicles. Using composite springs can less vehicle weight especially less unspring masses. It is one of the main features of composite materials. Another feature is viscoelastic properties and hysteresis effect. That can be give excellent noise and vibration properties for vehicles.
Mathematical model of orientation of a ferromagnetic particle in magnetic field
Authors: Masyutkin Eugene , Masyagin Vasilii , Avdeyev Boris
Published: October 2018

A mathematical model of the rotational motion of a particle with pronounced ferromagnetic properties, due to the moment of forces from the side of an external homogeneous magnetic field is deduced in the article. The basis of the model is the equation for the moment of forces effecting on a solid body. The driving torque is the magnetic moment, calculated through the strength of the external field and the magnetization of the material. The counter–torque is the moment of medium resistance, which mainly depends on the viscosity of the medium in which the simulated body is located. The dependences of the angle of rotation and angular velocity on time are determined. The mathematical model is represented as a system of differential equations. The developed mathematical model was solved by a Runge – Kutta fourth order method. The obtained results are presented in the form of graphs.
Dynamic loading of a water jet propulsion drive of amphibious vehicles
Authors: Abdulov Sergey , Taratorkin Alexander , Nenashev Pavel
Published: October 2018

The analysis results of dynamic loading of the amphibious vehicle’ water jet drive are presented, the hypothesis about the durability limitation of the drive due to the onset of resonance forced and parametric oscillations is advanced. Solutions of that problem are justified.
Stabilization of vibrations of rotary machines in radial sliding bearings with integrated liquid
Authors: Kiryukhin Aleksandr
Published: October 2018

The use of radial bearings with segments on a self-generated hydrostatic suspension has been substantiated in order to satisfy the requirements for precision positioning of axes and efficiency of stabilization of shaft oscillations of power-consuming rotary machines. The methods of turbomachine dynamical analysis based on the modelling of the viscous friction forces process and inertia in lubricating films that balance the harmonic loads on the shaft by redistributing the lubricant flow parameters in the bearing gaps with integrated liquid dampers have been further developed. The complex approach for improving functional properties of turbomachine supporting block on the basis of multicriteria optimization of hydraulic tracts parameters and lubrication system operating modes is presented.
Modeling of turbine wheel assemblies taking into account the deformation of parts
Authors: Yanyukina Mariya V. , Bolotov Mikhail A.
Published: October 2018

The article researches an impeller. The assembly process requires to accurately adhere to the given assembly parameters. To do this, preliminary calculations are carried out, they must take into account a number of factors, such as tolerances in processing the parts to be assembled, the tensile-compression stiffness, torsional rigidity, and others. The article studies the influence of blades deformation with the contact pressure on the accuracy of the goods assembly parameters.
Information models for problems solving of hardware design of multi-range chemical industries
Authors: Mokrozub Vladimir , Malygin Evgeniy , Nemtinov Vladimir
Published: October 2018

The information models for determining sizes of apparatuses in chemical-technological systems and the development of separate technological apparatus are provided. The information model for solving the problem of calculating the determining sizes of apparatuses is based on the representation the structure of the chemical-technological system in the form of oriented polychromatic hypergraph, the edges of which are the products, and the vertices are the stages of the technological process. The information model for solving the problem of developing a separate technological apparatus allows determining its structure, the parameters of its elements and their location in the 3D model of the assembly. The structure of the apparatus is presented as a hierarchical system of hypergraphs, which was built on the base of the «and – or» tree of possible elements of the apparatus and the rules, that allow to select the necessary elements of «and – or» tree, depending on the functions of the apparatus and the conditions of its operation. The location of the elements of apparatus in space is determined by logical conditions describing their position relative to each other in the 3D model of the assembly.
The analysis of methods effectiveness of automated non-destructive testing of products based on Data Mining methods
Authors: Ovechkin Maksim V. , Shelihov Eugeniy S. , Ovechkina Julia I.
Published: October 2018

Purpose of the study: the analysis of the effectiveness of automated nondestructive testing methods within the objectives of data clustering on the use of short-wave electromagnetic radiation in flaw detection. Research methods: Kohonen self-organizing maps (SOM). The relevance of the work is that due to the increased demand for quality and reliability of products are becoming increasingly important physical methods for automated control of metals and products thereof that do not require cutting or fracture specimens of finished productes. The article noted common features of methods of short-wave electromagnetic control of products. The effectiveness of the Data Mining approach to the construction of a hypothesis on the interrelationships of data groups on non-destructive testing of products is substantiated. As an instrument, the method of self-organizing Kohonen maps was chosen. An example of a part of training data and neural network configuration parameters performing the task of visualization and clustering is given. It is concluded about the lead electromagnetic methods of automated control of complex products in production. The resulting distance matrix and the cluster map are shown. An example of applying the results of analysis to the problem of testing spot welded joints is considered. Given the further directions of research is to develop a computer image processing techniques in the framework of automated non-destructive testing systems.
Distributed impact elements and their use in modelling vibration fields in machines structures
Authors: Krupenin Vitaly
Published: October 2018

To model the vibration fields established in composite multidimensional machine structures, distributed impact elements are used, which take into account the wave processes occurring in colliding subsystems (shock pairs), which, in turn, quite often determine the structure of these fields. Two types of corresponding models are considered: with simple and complex structures. Specific examples of dynamic models are given. The results of the analysis are given.
Transporting devices for grain with new types of working units from polymeric materials
Authors: Dorochov Andrey , Moskovskiy Maksim , Chaava Mikhail
Published: October 2018

The existing standard technologies for obtaining seeds of various reproductions in farms have a wide variation in the initial harvesting parameters, mechanization and technological modes of operation, which affects the final quality indices of seed material and its cost price. Modernization of the working parts of machines and units that provide the technology of loading and reloading operations will improve the quality of grain at this stage of harvesting. The installation of a new type of transporting device in a typical grain-handling machine loader allows to reduce the crushing and damage of grain by more than 20%.
Evaluation of the running parameters of the polar cranes installed in the NPP reactor compartments during their control assembly
Authors: Pimshin Yuri I. , Zayarov Yuri V. , Pimshin Ivan Yu.
Published: October 2018

The paper considers the basic principles of motion along the polar cranes circumference. The geometric parameters of the mutual turn of the crane running wheels are shown to be the critical features in the crane motion along the circumference. Noncompliance of the turn determines the transverse slippage of the crane running wheels, while the wheel shape affects only the elastic longitudinal slip. The consequence of slide and slippage is the railhead actuation on one side and the loss of the road stability when the crane moves. Stability of the road-holding rigidity ensures achievement of targeting accuracy of the load-gripping device. These parameters are the main operational characteristics which should be normalized and should be minimal in absolute terms.
Simulation of the capillary action via FlowVision software
Authors: Ishbulatov Lenar , Galyshev Sergey , Solovev Pavel , Aksenov Andrey
Published: October 2018

The paper considers the simulation of fluid flow processes in the FlowVision software with taking into account the capillary action, wettability, surface tension forces and fluid viscosity. Test problems were solved to take into account the influence of surface wettability on the basis of modeling a drop of mercury placed on a hydrophobic surface, as well as taking into account the capillary action by immersing a thin tube in a liquid and raising its level. Qualitative and quantitative analysis of the results was made, conclusions were made about the applicability of the FlowVision software for simulating the process of impregnating the framework of reinforcing fibers with a binder when forming products from metal matrix composites.
Methodology of technological and operational factors accounting in the process of complex optimal design of microand nanodevices manufactured using group technologies
Authors: Meshkov Sergey
Published: October 2018

The problem of providing key quality indicators (indicators of purpose, manufacturability, reliability) of micro-and nanodevices at the design stage is considered. The limitations imposed by a group technology production on methods ensuring serial production availability and reliability of micro- and nanodevices are described. The design of micro-and nanodevices methodology that allows to ensure the optimal balance between serial production availability in the given production conditions and time to failure in the specified operation conditions under given restrictions on the device purpose indicators by taking into account the technological and operational factors is described.
Evaluation of efficiency of buses “Volgabus” with determination of critical values of vibration acceleration of transmission
Authors: Chernova Galina , Sinkov Aleksey , Moiseev Yuriy
Published: October 2018

The article provides a rationale for diagnosing the condition of the driving shafts of buses “Volgabus”. It is determined that the efficiency of the transmission depends not only on the influence of operational factors, but also on the quality of maintenance. The authors monitored the malfunctions of the driving shafts of buses and determined the task of diagnosing the transmission without removing the units and aggregates. The technique of fast diagnostics of the bus transmission by the instrumental method is offered. The article presents the results of a study of vibration acceleration of the buses “Volgabus” transmission with different mileage values. Critical values of vibration acceleration at which buses cannot be used are determined. The recommendations for the rapid diagnosis of the transmission of buses are given.
Determination of output-input ratio of mobile machine wheeled mover
Authors: Artyomov Nikolay , Podrigalo Mikhail , Abdulgazis Aziz , Abdulgazis Umer
Published: October 2018

The output-input ratio of a car wheel depends on power losses induced by tyre deformation. Wheel static, kinematic and dynamic radii depend on the tyre deformation radii and, consequently, predefine the mover output-input ratio. This article proposes a method to asses an instantaneous output-input ratio of a wheeled mover as a ratio between a wheel kinematic radius and dynamic radius on the basis of the analysis of the previously conducted research.
Analyzing the dynamics of a single car wheel
Authors: Artyomov Nikolay , Podrigalo Mikhail , Abdulgazis Aziz
Published: October 2018

The paper presents an analytical solution to the equation of dynamic energy spending for rectilinear uniform rousset of a drive wheel with an elastic tire when driving on a solid support surface. To that end, the paper proposes different initial calculation charts to analyze the dynamics of the drive wheel; it also finds the efficiency and the additional energy spending in wheel rousset.
Synthesis of methods and principles of ensuring the reliability of one-off and serial production machines
Authors: Kasyanov Valery , Deryushev Viktor , Kosenko Evgeny , Kosenko Vera , Golubeva Alina Y.
Published: October 2018

The paper considers the development of methods for managing the reliability of single-production machines (lunar rover, rover, rolling mill, president’s car of the country, etc.). Many years of experience in the field of machine reliability allowed the leading specialists of the department of AS and DS to develop a method for managing reliability for serial and mass machines. in the case of evaluating the reliability of single-production machines, development of algorithms based on sample data and data obtained during the transition from the sample to the set of values was carried out. The resource of the parts is defined as the main parameter, which, irrespective of their purpose, form the sampled samples of units of finite volume. Given that the main parameter of the details the resource depends on the strength and loading parameters, the correlation between the strength parameters and the acting stresses (endurance limit, active stress in the dangerous section, strength increase coefficients and the coefficient of increasing the acting voltage) is used in the studies. In such conditions, the estimated resource should relate to each entity of the population or a sample from it. During the research, a parameter is defined as the minimum resource that will determine the homogeneity of the sample (the aggregate), while the main condition for ensuring the same main parameters of parts with sudden failures is the Veler-Sørensen-Kogayev formula based on the experimental initial fatigue and loading statistics . Thus, a method has been developed to ensure the reliability of single-source machines, based on the synthesis of two methods and principles for serial and single-purpose machines.
Non-exponential networks in production
Authors: Popov Alexander , Valiev Rustem
Published: October 2018

The article describes the characteristics of special types of queuing systems. Special types of queuing systems are listed. The main methods for calculating of non-exponential queuing systems are given.
Assessment of steel mechanical characteristics of non-standard compact specimens under statistical tests
Authors: Khasanov Rim N. , Valiev Aybulat S. , Kuzeev Iskander
Published: October 2018

It is necessary to evaluate possible changes of mechanical characteristics while determining reasons of equipment destruction as a result of implementation of emergency situation. Limited amount of the material collected at the local fracture point requires the use of compact testing specimens. Practical implementation of the method requires establishment of dependence setting correlation between characteristics which were determined under the standard method and the method that uses compacts specimens. In the present research as exemplified by the steel 20 for recalculation of values of yield limit determined by different methods.
Influence of single-walled carbon nanotubes’ diameter and length on the thermal conductivity of polymer composites
Authors: Aung Zaw Ye , Prosuntsov Pavel , Reznik Sergey
Published: October 2018

Physical properties of composite materials can be improved by carbon nanotubes (CNTs). However, the thermal resistance between the polymer matrix and CNT at nanoscale can result in lower thermal conductivity. The paper analyses influence of CNTs’ diameter and length on effective thermal conductivity in epoxy-based composites. It analyses the effect of the diameters, lengths and volumetric fraction of CNT on composites’ thermal conductivity.
Numerical simulation of the non-regular mode of cooling a high-temperature metal billet by the flow of a gas-liquid medium
Authors: Makarov Sergey , Dement’yev Vyacheslav , Makhneva Tat’yana , Makarova Elena
Published: October 2018

A mathematical model of heat transfer at cooling a high-temperature metal billet from structural steel by the flow of a gas-liquid medium in a vertical circular channel is presented. The model has been built with the use of the continuum mechanics approaches and the theory of heat-mass transfer. The non-regular mode of cooling is considered. The results of the numerical parametric investigations of the heat transfer at cooling a metal billet are obtained for a standard regime of thermomechanical strengthening on the basis of the mathematical model of conjugate heat transfer in a two-dimensional nonstationary formulation accounting for the symmetry of the cooling medium flow relative to the longitudinal axis of a cylinder. The control volume approach is used for solving the system of differential equations. The flow field parameters are computed by an algorithm SIMPLE. For the iterative solution of the systems of linear algebraic equations the Gauss-Seidel method with under-relaxation is used. Taking into account evaporation in the liquid, the intensity of the change of the rate of cooling the material of the metal cylindrical billet by the laminar gas-liquid flow is analyzed depending on the time of cooling and the velocity of the gas-liquid flow.
Application of multiset theory for the selection of the single result from alternatives aggregate obtained using different decision methods
Authors: Solovjev Denis , Solovjeva Inna , Litovka Yuri
Published: October 2018

In this article are discussed the main reasons to obtain different results in decision-making by various methods. It is proposed to use the multiset theory for selection a single result from a solution aggregate. In the work is described mathematical decision-making model based on the argument calculating for maximizing the elements multiplicity functions of the arithmetic sum to found multiset solutions. Here are presented decisions compare results, which were made by expert group and according to the approach proposed by the authors on an example of the galvanic coating choice. In this article are represented recommendations for improving the efficiency of the proposed approach for obtaining the unit dimension of the resulting multiset solutions.
Neural network for decision support to determine the operating mode of lined equipment
Authors: Yemelyanov Vitaliy , Yemelyanova Nataliya , Nedelkin Alexey
Published: October 2018

The paper presents data on the problem of determining the operational mode of lined equipment at the iron and steel works. A neural network synthesis has been performed to determine the operational mode for lined equipment. The structure of the proposed neural network for decision support is described. The results of the modelling the neural network to determine the PM350 torpedo ladle car operational mode are presented.
Methods for road microprofile statistical data transformation
Authors: Sarach Evgeniy , Kotiev George , Beketov Sergey
Published: October 2018

In the paper presents methods for road microprofile statistical data transformation. These methods can be used to solve suspension theory problems related to rapidity functions determination using velocity characteristics and transport vehicle movement imitational modeling via microprofile random function trajectory.
Investigation of the influence of perforation parameters on the acoustic efficiency of sound-absorbing structures
Authors: Anoshkin Aleksandr N. , Pisarev Pavel V. , Maksimova Karina A.
Published: October 2018

Within the framework of this work, calculation and experimental studies of the influence of technological defects on the acoustic efficiency of sound-absorbing structures (SAS) are carried out. In this work, the physical and mathematical models of predicting the effective acoustic properties of cells with different diameter of the throat were formulated. A series of laboratory experiments was performed to evaluate the acoustic efficiency of SAS cells with different diameters, on an interferometer with a normal sound wave drop. Based on the results of the studies, the dependences of the natural frequency of the resonator and the coefficient of acoustic pressure loss depending on the diameter of the perforation were revealed.
Modelling performing calculations over the data presented in a probabilistic form
Authors: Sapozhnikov Nikolay , Bryukhovetskiy Aleksey , Polyakov Aleksandr , Moiseev Dmitriy
Published: October 2018

The article presents the results of comparison of different forms of representation and transformation of information in the form of non-positional probabilistic display. Assessment of the hardware of the compute nodes and the analysis of the relationship between accuracy of representing the information and their performance have been carried out.
The vector optimization and modeling of a technical systems
Authors: Matusov Leonid B.
Published: October 2018

The construction a feasible solution set with a given accuracy is a main problem in multicriteria optimization and modeling. In order to construct the feasible solution set, a method called the Parameter Space Investigation has been created and successfully integrated into various fields of industry, science, and technology. Multicriteria modeling (identification) is a new direction that is of great value in applications. In the most common usage, the term “identification” means construction of the mathematical model of a system and determination of the parameters (design variables) of the model. The construction a feasible solution set with a given accuracy is a common way for solving multicriteria optimization and modeling problems. The issues of the estimation of the Parameter Space Investigation method convergence rate, the approximation of the feasible solution set are described. Besides these, the multicriteria identification problems of mechanical systems are discussed too.
The approach of creating a particular postprocessor and using CNC measuring cycles
Authors: Martinov Georgi M. , Stas Anna V. , Kudinov Oleg A.
Published: October 2018

The article is devoted to research, development and testing of the postprocessor for the CNC system. In the article was made a comparison between the methods for creating postprocessors, was described the development of a postprocessor and of the cycle of determining the diameter of the shaft and the coordinates of its center, used in testing postprocessor. In the work are demonstrated the tests of the developed postprocessor. As a result, after the work of the postprocessor, there is a finished NC for the CNC system.