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ENGINEERING

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ЭЛ № ФС 77 - 80772, 16+

СТОЙКОСТЬ ТОКАРНОГО ИНСТРУМЕНТА И ЕЕ ВЛИЯНИЕ НА СТОИМОСТЬ ПРИ ОБРАБОТКЕ ТИТАНОВОГО СПЛАВА ВТ3

Posted in 2012, ENGINEERING, Выпуск № 5(5) Октябрь 2012 | 0 comments

Обработка титанового сплава ВТ3, используемого преимущественно в авиастроении, является весьма сложной задачей. Для обработки этого материала применяют современные твердосплавные режущие инструменты со сменными пластинами, различных форм. Марка сплава пластин для резцов определяется, прежде всего, физико-механическими свойствами обрабатываемого материала, видом обработки и жесткостью технологической системы.

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PERCEPTUAL INTEGRAL PATTERNS AS A METHOD FOR RAPID PUPIL TRACKING BASED ON ANN-MLP PERCEPTRON RESPONSE AND A MODIFIED NUMERICAL METHOD OF DIFFERENTIAL EVOLUTION

Posted in 2022, ENGINEERING, TECHNICAL SCIENCE, Выпуск № 06 (120) Июнь 2022 | 0 comments

The article offers a fast and accurate model of registration and tracking of pupils «RAPID-AN» in the task of video-oculography for devices with a limited computing resource (weak personal computers, embedded systems based on ARM architecture), to reduce the technology cost for individual use by disabled people and by health facilities. The model was based on the idea of the pupil registration process in the frame (finding the center coordinates and the region size most fully capturing the pupil) as a global, multifaceted optimization task. The target function is formalized as the meaning of ANN-MLP response perceptron over integral patterns, in a vivid sense similar to the desired object structure (pupil-iris) – the concept of perceptual integral patterns. In order to improve the convergence to extremum, a modification of differential evolution method is proposed, based on the process of forming the genetic isolation of solutions population in the vicinity of all local and global extremes of the target function, with subsequent growth of the most adapted insulation (next to the global extremum) and the degeneration of others, according to the Verhulst-Pierre differential equation. This behavior makes the search method less «greedy» and makes it possible to correctly extract a pupil from the full frame.

The model solves the problem of pupils registration with an error of not more than 1 – 2% on test datasets and a high speed of ~ 8.35 ms. in tracking mode on the architecture of BCM2837 ARM Cortex-A53 1200 MHz (embedded systems).

The comparative analysis was conducted, and performance of the model in comparison with some existing detectors was shown: Tiny Yolo v3, Viola-Jones (Haar-Cascade) method, etc.

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ANALYSIS OF STRUCTURAL CHANGES IN PTFE-BASED COMPOSITE MATERIALS AFTER THERMAL IMPACT

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article presents the results of PTFE-based composites x-ray crystallography analysis and experimental research of their parameters changes after high temperature exposure. Temperature of PTFE-based composites friction zone is higher than that of polymer vitrification. It is established that such temperatures may cause changes in both structure and tribotechnical qualities of the material, which begs the question of a temperature range, within which the parameters of composites supramolecular structures would stay stable. In this study, the range of amorphocrystalline composites stability is determined. The carried out comparative research suggests that the most thermal impact sensible structural parameter is the degree of matrix crystallization.

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MODELING ALGORITHM OF LOADS ON FOREST MACHINES ELEMENTS IN FORM OF GAUSSIAN RANDOM PROCESSES

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article analyzes the variety of technological operations (such as load on torsion torque, load on vehicle axle, load on transmission parts, etc.) and the movement of forest machines, during which the technological equipment is under load, that are chance time t functions, t.e. chance processes.

Results of one of the common load types modeling, i.e.torsion torque (TT), are presented by the stationary Gaussian process, and are the basic information for prediction of fatigue design life of FM parts at the design stage without full-scale tests and oscillation of random load processes.

The presented modeling algorithm can be used to simulate the load and predict the resource of elements of new forest technology.

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SPECIFICS OF MASTER DATA MANAGEMENT IN BANKING SPHERE

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article studies the specifics of basic data management of a company, which is supported by Master Data Management (MDM). Basic data help companies to gather important information about their activities, solve important tasks and make strategic plans, but the problem is that it is maintained in different sources, is formed by a number of employees and departments, which leads to its duplication and incomplete painting. MDM-system helps to solve these problems. To analyze the main data management specifics of a company, a study of the relevant process was conducted and the client domain master-data, which has the name of Customer Data Integration (CDI), was considered.

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OPTIMIZATION OF GRANULOMETRIC COMPOSITION OF COMPOSITE MATERIALS

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article shows the impact of type and granulometric composition of filler to the obtaining the required performance indicators of special-purpose composites. The research studies criteria that influence the quality of filler, its functional belonging. The necessary and sufficient criteria for the formation of an optimal granulometric composition of functionally selected fillers, allowing to obtain composites with specified parameters of structure and properties, have been established. The proposed methods have been tested in the development of a practical technology for producing radiation-shielding composites with specified performance properties on the basis of the optimal granulometric composition of various fractions of polymineral waste after chemical glass polishing.

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IMPROVING THE DURABILITY OF PLAIN BEARER WITH NONLINEAR SHAPE AND METAL COVERING

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The work presents an adequate hydrokinetic calculation method of tribosystem with slide surface support profile and metal covered runner, adjusted to friction. Based on the following equations: ideal liquid movement for “thin layer”, inertial force accounted for; continuity, metal covered runner surface fused shape profile, mechanical energy accounted for, – analytical dependence of basic working characteristics for friction pair for extreme and non-extreme cases was drawn out.

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ON EFFECTIVE CLEARING TECHNOLOGY OF COPPER-BEARING WATER WITH NON-SOLVENT- REAGENT

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article presents the results of a study of the galvanic production wastewater decontamination process, using non-solvent reagent ТНТ-15. Standard reagents are not always effective enough for drawing out heavy-metal compounds to a needed extent, which makes additional clearing with different methods necessary. Clearing wastewater with non-solvent reagent allowed to reduce copper ion Cu 2+ in the water and determine the optimal reagent dose. The mathematical model based on empirical data on the principle of regression and correlation analysis was used to develop sewage disposal scheme. The correlation between variables and optimum conditions was found, process optimization shown. The residue was additionally analyzed.

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MIGRATION FLOWS OF METROPOLIS: A SYSTEM-DYNAMIC MODEL

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

As a result of increasingly complex socio-economic processes and rapid changes, large cities as complex systems will not be able to survive and further develop without a new governance model that would allow for flexible adaptation to changing external conditions. Rational management of a metropolis migration process is essential for sustainable development. Migration modelling is a reliable tool for managing a metropolis as a complex socio-technical system. Different models of migration are known, but, from a practical point of view, simulation models are the most interesting. The aim of the study is to develop a system-dynamic model for the management of migration flows of the metropolis, which will significantly improve the quality and effectiveness of its sustainable development. The iThink 9.1.3 package was used to generate it.

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ELECTRIC HEATING AT NIGHT RATE OF INDIVIDUAL RESIDENTIAL BUILDING IN KHABAROVSK

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The use of electrical energy during the night minimum loads at a reduced rate allows to significantly reduce payments for heating needs. The work analyses electric energy consumption for heating needs of an exploited individual residential building in Khabarovsk. For the first time, it has been shown that the use of hybrid heating system in the form of water system «warm floor» and electrical convectors allows to significantly reduce charges for electricity while maintaining the level of comfort in the premises. It has been shown that the high response time of heating system «warm floor» allows reducing twice the capacity of storage water tanks. Using the method of electricity costs distribution by the intervals of daily rate zones, proposed by the authors, the capacity of water tanks accumulators is determined, allowing maximum approximation for usage of only a reduced night rate of electricity.

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RESEARCH OF MARAGING STEELS POWDER BLEND FUSSING AND COMPRESSION

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article provides research of maraging steels powder blend fussing and compression 18%Ni+9%Co+5%Mo+1%Ti+1%Re+66%Fe. Powder metallometric composition materials of 18%Ni+9%Co+5%Mo+1%Ti+1%Re+66%Fe system and their physical and mechanical properties serve as research subject. Research methods: materials’ physical and mechanical properties determination (bending strength, hardness), tribotechnical tests under friction while outside and without greasing substance. The research carries out the important task of extracting metallometric composition materials of 18%Ni+9%Co+5%Mo+1%Ti+1%Re+66%Fe system with enhanced physical and mechanical properties while spark plasmic fussing through phase- and structure formation pressure, heating rate and soak period. It was established that increasing 18%Ni+9%Co+5%Mo+1%Ti+1%Re+66%Fe system furnace charge capacity from 1.3 to 4 kJ through balanced current composition change allows to intensify ion diffusion process and liquid metal shift, to enhance consolidated samples density from ~80% to 98%, their hardness from ~20 HRC to ~50 HRC, and to reduce abrasive deterioration weight loss from 30% to 7%. The supposed spark plasmic fussing mode allows to reduce vebe time for 20 s. and get medium particle size in iron-clad matrix of ~2.4 and ~1.5 µm in accordance with mixture components.

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Instrument for monitoring content of magnetoactive particles in fluid medium on basis of operational masses of the emitted particles production

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

An instrument has been developed for use in laboratory practice of various industries for the purpose of monitoring the magnetoactive particles content in a fluid medium. The device comprises an operative magnetic cobbing machiner which provides for at least three step-by-step separate operations of the medium by means of sequentially arranged sources of equal magnetic action penetrating the flow of the medium, each of which consists of a nonmagnetic socket and a magnetic block periodically placed in the pole piece. Under each of the sockets, where spontaneous discharge of particles separates from the medium flux by magnetic coating on the outer surface of the sockets and transports to the initial section of the socket at the periodic removal of a magnetic block, there are scales with tension gauges, signals of which are transferred to the system digitization unit for the control of the magnetoactive particle content, which has the functions of visualizing the resulting dependency of the operational masses of the emitted particles.

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INFLUENCE OF PRESTRESS ON WORKING CONDITIONS OF CONTAINER WITH WIRE WINDING PITCH

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article considers the influence of prestressing on operating conditions of a vertical steel tank. For numerical implementation of research, computer models have been developed in the program system of finite element analysis of ANSYS Workbench in the calculation module of static analysis Static Structural. Full and half liquid filling of the container, as well as an empty container, served as operational loads of the model.

Studies of stress-strain state of steel vertical cylindrical container with pre-stressed winding wire at operating loads with constant wall thickness in height have been conducted. Full and half liquid filling of the container served as operational loads, as well as a case of an empty reservoir, which was also simulated in three variants with three pre-stresses in the design. For the first variant, the winding was applied with one interval in the diameter thread length between coils of 1:1, for the second – with a double interval of 1:2, and for the third – with a triple interval of 1:3.

As a result of the carried out studies, the stress-strain state of a strengthened steel vertical cylindrical tank with a pre-stressed winding of three types under operational loads was established. The obtained results make it possible to select the most efficient winding to ensure seismic stability of the structure. These studies are the initial and integral part of seismic stability analysis of a steel vertical cylindrical container for petroleum products.

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CALCULATION OF FOUNDATION SOIL STABILITY WITH STRUCTURE REMOVED IN SUPPOSITION OF CIRCULAR CYLINDRICAL SLIDING SURFACES

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article describes cases of shallow foundation removal from soil. The experiment of fixating the soil movement during pull impact is recorded with photography. The time span of removal in this case is determined by the time needed to fill the cavity with water and move the construction vertically. Method of calculating the foundation endurance, that of circular cylindrical sliding surfaces, presented by K. Terzhagi is described. It is shown that before the construction may be removed down its foundation, it can affect the soil with its removal, which is determined by pull increase and intensity. The possibility of construction and soil removal increases with negative water pressure reduction.

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PROBLEMS AND PROSPECTS OF WIND ENERGY SYSTEMS IN RUSSIA

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The topic under consideration in the article highlights the relevant problem of wind energy use as a main source of power for consumers. Wind power is currently one of the most promising renewable sources of alternative energy. The article analyzes the use of wind energy systems in Russia on the territory of the Volga Federal District in the context of its state and prospects of development. The main directions of wind power plants operations efficiency, as well as expediency of development of this industry, were studied. Based on the analysis made, research can be carried out to eliminate a particular wind energy problem. The implementation of the work done on this basis may lead the wind energy to a new level of development.

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USE OF VEGETABLE FLOUR IN PRODUCTION OF GLUTEN-FREE BAKERY PRODUCTS

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The gluten-free diet is considered a treatment for several diseases, of which celiac disease is the most significant. Vegetable raw materials are a rich source of functional micronutrients, biologically active compounds, dietary fibers and minerals. In order to improve the useful properties of bakery products, it may be recommended to include fruit and vegetable ingredients in their formulations. The influence of the addition of different types of vegetable flour (from cauliflower, fennel, zucchini) on the organoleptic and antioxidant properties of gluten-free bread products was assessed. The article presents the results of tasting of modeled types of gluten-free bread on their organoleptic quality indicators, as well as research and conclusions about the content of flavonoid bread in the developed models, enrichment of which enhances the functional properties of the product. Of three varieties of flour studied, fennel flour has been found to be the most effective for bakery products, increasing its attractiveness, biological value and antioxidant activity.

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MODERNIZATION OF DOUGH PREPARATION

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The article studies formulating aid impact (sugar and fat) on rheological and structurally-mechanical qualities of the final product. Facilities process flour of medium and weak bakery properties, which makes it necessary to reduce dough humidity to ensure proper appearance of pastry products. As a rule, dough humidity for such products is 1.0 or 1.5 % lower than that prescribed by GOST. This reduces the yield of bread by 2 or 3 %, which leads to misallocation of both basic and supplementary raw material. Preparation of semifinished products in a sealed tank, as well as their features and quality as baked bread were studied; in order to ­intensify the process, 0,005 % of potassium bromate was added to the dough. The yield of bread in this case increases by 2.5%, which leads to economic efficiency growth.

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THE USE OF EDUCATIONAL AND SOFTWARE ENVIRONMENTS IN STUDY OF DISCIPLINE «ELECTRICAL ENGINEERING AND ELECTRONICS» DURING THE COVID-19 PANDEMIC

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The forced transfer of technical universities, altogether or partly, due to the pandemic, to distance learning required the development and use of electronic educational resources to support all types of classroom studies and work of students in their study of technical disciplines, including the discipline of «Electrical engineering and electronics». Its course requires a lot of practical work with a limited amount of hours allocated for the studying. Use of developed electronic educational resources (educational and software environments of modeling and analysis of electronic devices, educational and training software, computer laboratory workshop, etc.) made it possible to meet the requirements of the FSES HE last edition of quality assurance of students’ training in the discipline. The article provides an example of the educational and software environment of ARCF use in the study of the active RC-filter, with which it became possible to reduce the probability of computational errors occurrences, to minimize the routine counting work for constructing charts of frequency characteristics of the filter and this way to increase the time to solve the set tasks of training.

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EVALUATION OF CORROSIVE RESISTANCE OF PROTECTIVE COATINGS ON BIODEGRADABLE MAGNESIUM ALLOY

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The corrosive resistance of Mg-Zn-Ca alloy samples with protective coatings and without it has been evaluated. In the study, protective coatings were obtained in two stages. In the first step, inorganic porous oxide coatings are formed on samples by the method of plasma-electrolytic oxidation. In the second step, organic PEO+PLA coatings are produced by filling the pores of the oxide coatings with a polylactide solution. As a result of the coatings formation, a significant reduction of corroding currents for the Mg-Zn-Ca alloy is achieved. The electrochemical tests showed that the protective PPE and PEO+PLA coatings were more resistant to corrosion than the uncovered ones.

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PROBLEMS AND PROSPECTS OF WIND ENERGY SYSTEMS IN RUSSIA

Posted in 2022, ENGINEERING, Issue № 5 (119) May 2022 | 0 comments

The topic under consideration in the article highlights the relevant problem of wind energy use as a main source of power for consumers. Wind power is currently one of the most promising renewable sources of alternative energy. The article analyzes the use of wind energy systems in Russia on the territory of the Volga Federal District in the context of its state and prospects of development. The main directions of wind power plants operations efficiency, as well as expediency of development of this industry, were studied. Based on the analysis made, research can be carried out to eliminate a particular wind energy problem. The implementation of the work done on this basis may lead the wind energy to a new level of development.

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