bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of processing in a SHF electromagnetic field on the parameters of vibro-wave processes generated by the impact of a solid body in cured polymer composite materials under the influence of climate factors
Authors: Zlobina I V 
Published: May 2020

Abstract
The studies have been conducted on the influence of environmental factors on vibration-wave processes initiated by the impact of a steel ball in control, cured carbon fiber and fiberglass processed in the SHF electromagnetic field. It is shown that the presence of control and experimental polymer composite materials (PCM) in full-scale conditions under the influence of environmental factors for 3 months leads to a significant decrease in the maximum and average values of vibration accelerations and a reduction in the vibration damping time. At the same time, the prototypes are characterized by a smaller decrease in the maximum values of vibration acceleration and stability of average values. In comparison with the initial control samples, the values of these parameters for carbon fiber and fiberglass are reduced by (43-59) % and (40-46) %, respectively.
Quality assurance in the process of machining of parts made of heat-resistant alloys with the help of abrasive electrochemical grinding
Authors: Mingazhev A D , Taimasova L A , Gunderov D V , Gafarova V A 
Published: May 2020

Abstract
For the purpose of efficient treatment of heat-resistant alloys, an abrasive electrochemical part grinding method is proposed using an advanced abrasive wheel cleaning method by means of abrasive wheel contamination assessment. The process was researched and it was revealed that a parameter which is a ratio of cutting force against the ECT (electrochemical treatment) phase duration within one round of spindle revolution is versatile, which means it does not dependent on the EDM electrode cutting feed rate, the depth of treatment, and is an independent value.
Indicators of the processes of combustion and soot content in the cylinder of a car diesel engine of 4CH 11,0/12,5 when working on an alcohol-fuel emulsion
Authors: Likhanov V A , Rossokhin A V , Devetyarov R R 
Published: May 2020

Abstract
The paper presents the results of the influence of the use of ethanol-fuel emulsion as a fuel on the performance of the combustion process and the soot formation processes of a 4CH 11,0/12,5 automotive diesel engine with a combustion chamber of the CNIDI type. The influence of the installation angle of advance of fuel injection on the maximum pressure and maximum temperature of the gases in the cylinder, as well as the mass concentration of soot particles in the nominal operating mode, is considered. Alternative fuel has a great influence on the content of soot particles in the combustion products, and their quantity, in turn, has a significant effect on the emissivity of the flame. And the thermal tension of the details of the cylinder-piston group depends on these indicators.
Plastic bending of the waveguide tubes with rectangular cross-section
Authors: Kudryavtsev I V , Brungardt M V , Novikov E S , Rastovtsev P A , Mityaev A E 
Published: May 2020

Abstract
This paper focuses on a new mathematical model of plastic bending of waveguide tubes with rectangular cross-section. The analysis of the known approaches and decisions is carried out, their shortcomings are shown and a new model of a thin-walled waveguide on the basis of the theory of plates and shells is offered. The solution is obtained by combining the semi-inverse Saint-Venant method and Airy functions. The received solution allows to generalize the available private solutions and have good agreement with known private empirical dependences for a plastic bending of tubes with rectangular cross-section.
Subminiature eddy-current transducer for studying defects in weld joints of high-strength steel
Authors: Ishkov A V , Dmitriev S F , Katasonov A O , Malikov V N 
Published: May 2020

Abstract
The article describes the design of a hardware-software system intended for studying the properties of high-strength steels. Within the scope of the study, defects in the welds of the transformer tanks made of high strength 08G2B steel were being located. Such materials belong to ultra-low-carbon steels, and thus, it is possible to study their properties applying the eddy-current method. In the course of the work, a subminiature eddy-current transducer with three coils wound on a core made of 80NM3 ferrite was designed and optimized. In the work, samples with model continuity defects (cracks and holes) were examined, and a study was conducted in order to simulate weld corrosion defects.
Quantity and quality assessment of multilayer coating adhesion strength
Authors: Mingazhev A D , Kuzeev I R , Gafarova V A 
Published: May 2020

Abstract
Development and improvement of modern machinery, increasing its performance efficiency are closely related to operation conditions of its main parts, units and devices becoming rougher. Various aggressive and force factors impact on machines and devices resulted in development of special protection and strengthening coatings including multilayer ones. Shifting from simple coatings to more complicated ones set he task to control their quality parameters.
Improving the efficiency of a hydraulic drive with a closed-loop hydraulic circuit
Authors: Emelyanov R T , Klimov A S , Kravtsov K S , Olenev I B , Turysheva E S 
Published: May 2020

Abstract
While developing the Arctic territories, the use of mechanical equipment, adapted to work at low temperatures, is required. The power element of hydraulic machines is a hydraulic fluid, which, under different ambient conditions, changes the viscosity-temperature properties. With decreasing temperature, the viscosity increases. The hydraulic fluid lubricity of the rubbing surfaces of the hydraulic drive elements is declining. On rubbing surfaces, the oil film strength decreases, which leads to its rupture. A hydraulic circuit of the hydraulic drive is proposed, containing an additional adjustable throttle. When throttling the working fluid, the thermal energy releases. The process of throttling the working fluid is described by differential equations. To simulate the proposed system, a dynamic closed-loop hydraulic model was compiled using MATLAB&Simulink. Modeling the hydraulic drive made it possible to obtain the time dependences of the working fluid pressure as it leaves the throttle. The obtained dependences by mathematical modeling made it possible to determine the effect of the differential pressure on the throttle on the fluid flow rate, as well as the dependence of the decrease in the liquid flow coefficient on the differential pressure. The use of a throttle hydraulic actuator with a closed-loop hydraulic circuit ensures stable temperature conditions.
Automation of management and control system for wellhead equipment of a production well
Authors: Kramarenko V A , Lunev A S , Kaizer Yu F , Tyukanov V L , Lysyannikov A V , Kuznetsov A V , Chavyraa Ch D , Sharshembiev J S 
Published: May 2020

Abstract
This article proposes a version of the management and control system for the wellhead equipment of the production well. It considers the analyzed and confirmed currentness of the use of such a system. The main functions of the system allow continuous control of actuators of the wellhead equipment in real time. It solves the problem of the operational stabilization of pumping equipment and ramping up the well to the optimum operation.
Vibration damper-calibrator for shock wave damping from sharp bit installation on the bottomhole
Authors: Bashmur K A , Zagulyaev A V , Petrovsky E A , Bukhtoyarov V V , Kukartsev V V 
Published: May 2020

Abstract
This article addresses the problem of drill string vibration. In particular, the issue of quenching of high-amplitude low-frequency vibrations generated from sharp installation of the bit on the bottomhole is analyzed. This problem is virtually uncontrolled and arises from objective factors such as rock collapse and subjective factors such as driller error. It is proposed to use impact type of vibration damper for damping of this type of vibration. Possible design of well impact vibration damper-calibrator is shown. A dynamic model of the vibration damper has been built. Analysis of the model suggests the efficiency of using these types of vibration dampers to eliminate high-amplitude low-frequency vibrations of drill columns.
Investigation of the torque electric drive of the enclosing structure at low temperatures
Authors: Klimov A S , Servatinsky V V , Yanaev E Y , Volkov R V , Stepanyan A S 
Published: May 2020

Abstract
The article deals with the study of a torque electric drive at low negative air temperatures used as part of the enclosing structure of a ventilated underground building. The increasing of the efficiency of the torque electric drive of the enclosing structure is analyzed, a simulation model of the torque electric drive is developed and a model of the control system of the enclosing structure in the language of MATLAB&Simulink is designed. A software model in the form of Arduino software package was developed to study the drive operation of the ventilated underground of building enclosure structure in the permafrost zone.
The study of influence of chemical composition of steel 35HGSL on the characteristics of shrinkage, casting defects and microstructure
Authors: Skryabin M L 
Published: May 2020

Abstract
Today, steel castings have become an integral part of modern foundry production. In the process of obtaining castings, any defects inevitably appear. In this paper, we consider the production reasons for the formation of defects in the manufacture of castings made of 35XGSL steel when casting on investment models. The features of heat removal from the casting during primary and secondary crystallization are also considered. The classification of casting zones by the orientation of crystals in castings is given. The regularity of the influence of the cooling intensity on the shrinkage character is revealed.
Marginal reserve: determination, calculation and estimates
Authors: Sadykhov G S , Kudryavtseva S S 
Published: May 2020

Abstract
Analysing prolonged operating terms of non-restorable items, based on quantitative index “mean residual life over assigned operating time”, we can see this index as not always efficient to contribute to operating term prolongation; mainly, because using it we do not consider the change regularities of marginal reserve, over appointed operating time. Another index introduced by us, “mean residual life over assigned operating time during a determined term”, has the same limitations, because the time calculated by means of that includes marginal reserve during a determined, over the assigned, term. In this paper, to determine the residual reserve over assigned operating term, marginal reserve is taken as the margin between these indices. Calculation formula and estimates are proved for the introduced index, which enables to substantiate operating terms prolongation to the required values over the appointed ones. Also, the change limits are determined for the introduced index, depending on time. Besides, regularities of the marginal reserve are explored, in dependence on the character of change of item failure rate. Formula of limit value of the introduced index is proved for the steadied, in time, item failure rate. The proved formula is recommended for high values of appointed operating time of items.
Chemistry of the process of formation of nitrogen oxides in the combustion chamber of gas-diesel
Authors: Lopatin O P 
Published: May 2020

AbstractUsing the results of modeling of isothermal kinetic systems for calculating the kinetics of nitrogen oxides formation during combustion of natural gas and diesel fuel in diesel engines, summing up the known data of elementary reactions during combustion of methane and selecting the most significant ones from them, excluding processes with high activation energies, the mechanism of nitrogen oxides formation in the gas diesel cylinder when working with exhaust gas recirculation is presented in this work as a certain sequence of stages and branches of intermediate and final elements formation.
Drivers alert system in the conditions of information shortage
Authors: Glukhikh R S , Grazhdantsev E V , Zeer V A , Rastovtsev P A , Elagin A I 
Published: May 2020

Abstract
The article presents the results of an accident analysis in the Russian Federation. Trends in reducing the number of accidents have been identified, but over the past 5 years the severity of their consequences has remained at a high level, despite the development of vehicles active and passive safety systems. A new accident prevention system is proposed by informing drivers about the occurrence of an emergency in conditions of insufficient and limited visibility, based on measuring the parameters of the vehicle movement in real time using GLONASS / GPS technologies.
Determination of measurement errors for the tribological properties of the carbon-carbon composite in aircraft brakes
Authors: Alisin V V 
Published: May 2020

Abstract
The article is focused on the accuracy of quantification for the tribological properties of a frictional carbon-carbon material during braking. The experiments were performed with the IM-58 frictional testing machine when the rotating shaft with a previously established flyweight was in the braking mode. The tests for frictional heat resistance were performed with 2168 UMT. The research deals with the changes in friction and wear properties under the conditions of sample heating. The paper describes accuracy characteristics for the measured tribological properties. The maximum permissible temperature of frictional heating in terms of wear was established for reliable operation of the brake unit.
Use of infrared thermography to control osteoreparative and integrative processes during implantation in animals
Authors: Krasnikov A V , Krasnikova E S 
Published: May 2020

Abstract
Thermography is an integral indicator which is formed by means such factors as the vasculature and the level of tissue metabolism. Infrared thermal imaging can be a tool for assessing the safety and effectiveness of implantation in bone tissue using various materials. The aim of the study was a comprehensive assessment of osteoreparative and integrative processes using thermography when implantation in dogs. The research objects were clinically healthy outbred dogs (n=16) at the age of 1 year and a live weight of 10-12 kg. Experimental implants coated with titanium dioxide had on their surface a polymer film of polyazolidinammonium modified with halogen hydrate ions with nanoaggregates of flavonoids according to the original author’s technique (Patent No. 2535067). Similar implants without coating were used as a control. According to the results of x-ray studies in the early and longterm after surgery, there were no foci of bone resorption in the peri-implant zone. Thermography showed a difference in temperature values in the peri-impalantant zone of experimental and control samples reaching 2°C during 1-4 weeks after implantation. On day 32, the temperature indicators for control and experimental samples were stabilized. Consequently, osteoreparative and integrative processes when using implants with author’s coating are accompanied by significantly less metabolic stress for the animal’s body, which was established using infrared thermography.
Thermal-oxidative stability control of motor oils by thermal energy with cyclic temperature change
Authors: Kovalsky B I , Shram V G , Petrov O N , Vereshchagin V I , Sokolnikov A N 
Published: May 2020

Abstract
The results of the study of the thermo-oxidative stability of Castrol Magnatec R 10W-40 SL/CF partially synthetic engine oil with cyclic test temperature changes from 150 to 180 °C and from 180 to 150 °C taking into account the thermal energy absorbed by the products of oxidation and evaporation are presented. The graphical dependences of the decimal logarithm of the thermal energy absorbed by thermostatic products on the decimal logarithm of the test time are obtained, which are described by linear equations in the cycles of increasing and lowering the test temperature, which made it possible to determine the effect of time on the indicators of thermo-oxidative stability.
Impedance measurement: transformation of the probability density function of the results uncertainty
Authors: Baranov V A , Myasnikova M G , Pecherskaya E A , Pushkareva A V , Cypin B V 
Published: May 2020

Abstract
Monte Carlo method modeling allows determining the transformation of the probability density function of the uncertainty of the impedance components measurement results. Direct measurements of impedance components are based on the indicative form. The probability distribution density function of the uncertainty of direct measurement results is a constant. The components of algebraic and trigonometric forms of impedance are measured indirectly. The type of transformed probability density function for these forms is determined by calculating estimates of mean, standard uncertainty, extended uncertainty, asymmetry coefficient. Modeling allows to obtain reliable estimates of extended uncertainty of indirect measurements results of impedance components in accordance with current metrological standards.
The study of the wear of the control knives of the straw chopper
Authors: Ishkov A V , Malikov V N 
Published: May 2020

Abstract
The article considers the topical task of studying the wear rate of steel parts in the course of agricultural work. The wear of the knives of chopper-cum-spreaders used in agricultural works is determined and compared with control samples. Within the scope of the study, the relative linear and weight wear was being determined. The results of the study of dimensional parameters are given in the article. The dependence of wear on the operating time and zones of various wear of the part is determined. A graphic illustration of these dependencies is provided. The mechanism of wear of these parts is proposed. It was established that it is necessary to change the design of the hardsurfacing overlay used in order to maintain the acceptable cutting properties of the knife until it reaches its limit state, more specifically: firstly, to refuse applying hardening strips of hard alloy on the reverse side of the cutting edges by 1/3 of their length located at a distance of 65-70 mm from the flat end; secondly, to make the width of the strips variable, gradually increasing it to a size 1.5 to 2 times exceeding the blade width when approaching the flat end of the knife, i.e. give them triangular or curvilinear shape that is close to and/or overlapping the boundaries of the wear outline; thirdly, the triangular shape of the strips can be achieved due to the excessive material released from the unhardened 1/3 of the blade length.
Adaptive method of controlling dynamic processes in non-deterministic systems
Authors: Gdansky N I , Karpov A V 
Published: May 2020

Abstract
This article describes a digital method for an adaptive motion control of single-degree-of-freedom object according to a given movement function on condition that external low-frequency mechanical load can be changed arbitrarily. It is proposed to simulate an external load acting on a controlled object to predict its dynamic behavior. The external load model is determined by a set of coefficients that represent the partial derivatives of the load as a function of time and spatial coordinate. These coefficients are calculated using feedback data obtained at previous moments of the movement of the controlled object. The maximum order of derivatives in a model is called the model order. The structures of zero-, first-, and second-order models are given, including the practically important case of digital measurements of the angle of rotation of the steered shaft. The article also discusses the main practical problems associated with the calculation of model coefficients and their subsequent use to control the facility.
Analysis of the formation and evaluation of performance indicators and efficiency of the organization’s management system processes
Authors: Akhtulov A L , Ivanova L A , Charushina E B 
Published: May 2020

Abstract
The article discusses some recommendations that will help organizations develop and implement their own methods for assessing quality management systems; a methodology for determining the effectiveness of processes is proposed. The main tasks for assessing the effectiveness of the quality management system are formulated and the selection of criteria for their significance is considered.
Assessment of the state of a lubricator by the size of the acoustic signal in a loaded pair of friction of a mining machine transmission
Authors: Knyazkina V I , Safronchuk K A , Ivanov S L , Pumpur E V 
Published: May 2020

Abstract
As a result of the studies, the possibility of assessing the state of the working surfaces of mining machines, in particular bearing assemblies as a whole without disassembling the gearbox, is confirmed. An innovative solution in this matter is to ensure the delivery of the lubricator to tribolcoupling through the channels of the lubrication system, according to its state, determined by the size of the acoustic signal of the ultrasonic range in the friction pair.
The oil spills stopping device for oil pipelines
Authors: Petrov O N , Agrovichenko D V , Sokolnikov A N , Vereshchagin V I 
Published: May 2020

Abstract
Emergency oil spills during main pipeline transportation have an extremely negative impact on the ecosystem. It is not possible to estimate the effects of oil spills, because oil is a product of long period decay. Oil pollution compromises processes proceeding in the biosphere, changes the living conditions of living organisms and their interrelation. Oil spills need to be prevented for negative impact reduction or, in case of an accident occur, spill need to be stopped and consequences need to be eliminated in a short time. Accident prevention is achieved by observing the requirements and rules of engineering surveys and pipeline design. If the requirements of standards are complied with, the hydrogeological and climatic features of the district are considered during design, construction and operation, the pipeline should work without accidents during the service life. But accidents may occur as a result of human factors, natural calamities and other unexpected circumstances. Oil spill prevention is not simple and not standard task. For time and costs reducing universal tool for oil spill prevention needs to be invented. This tool needs to be used before temporary clamping structure will be installed.