Vol 18, No 4 (2017)

Articles
INJECTION MOLDING OF STRUCTURED MULTIPHASE MATERIALS
Semenov A.B., Muranov A.N., Kutsbakh A.A., Semenov B.I.
Abstract

Contemporary and future-oriented mechanical engineering requires the use of a new set of methods for processing, manufacturing, changing the state of materials implemented in the production process. In particular, the level of modern and prospective blank part production industries is largely related to the development of injection molding of structured multiphase materials - powder and granule technologies of a new generation. In this article, such widely used by foreign industry modern injection molding technologies of structured multiphase materials as the powder injection molding (PIM) technology and the thixoforming technology, are considered. A description of specific rheological effects that determined the fundamental possibility of the appearance and practical application of these technologies is given, and some of the most relevant physico-mathematical models of rheological behavior of structured multiphase materials are considered. In addition, the article demonstrates the efficiency of implementation and high potential for development of powder injection molding technology (PIM) for mass production of small-sized shaped parts in Russian Federation. The need for the development of educational programs and standards, including special disciplines and courses aimed at training technical professionals not only in the field of present commonly used technologies, but also such promising technologies as powder injection molding (PIM) and thixoforming, was noted as w

RUDN Journal of Engineering Researches. 2017;18(4):407-425
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PHOTOMECHANICAL IVESTIGATION OF STRESSES ON THE CONTOUR OF CRANKPIN OIL HOLE IN A CRANKSHAFT OF INTERNAL COMBUSTION ENGINE
Zhed O.V., Kopylov V.V., Koshelenko A.S.
Abstract

Crankshafts fail from fatigue in locations of the greatest stress concentration. Such areas are the openings of lubricant holes on crankpin and main journals of the shaft and the fillets between webs and journals. Factors of safety in these locations are minimal. When analyzing crankshafts, the main journals are analyzed for torsion only and the crankpins - for both bending and torsion. The influence of fillet size on bending stress distribution in the plane of the cranks was investigated in the first stage of studies [2; 3] and the distribution of torsional stresses of the crankpin was further studied in [4-6]. This paper presents an original methodology for determining the intensity of stresses in oil hole openings caused by torsion and bending loads on crankshaft journals that arise in the working cycle of internal combustion engine by physical modeling with optical transparent flat models according to the method of photomechanics. The necessary rigging equipment for the experiments of bending and torsional loading of crankshaft models was designed and manufactured. The performed analysis made it possible to establish the qualitative and quantitative factors that affect the stresses on the contour of oil hole opening from bending and torsion induced deformations of the crankpin.

RUDN Journal of Engineering Researches. 2017;18(4):426-436
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PALM OIL AS ALTERNATIVE FUEL FOR AUTO-TRANSPORT IN NIGERIA
Oshchepkov P.P., Adedoja Adegbenro S.
Abstract

The paper presents the results of the analysis on using vegetable oils as fuel for diesel engines. Possibility of using palm oil as alternative fuel is considered. Physicochemical properties of plant oil and the requirements for diesel fuel are given. Changes in physicochemical parameters of composite fuel are investigated. Palm oil is proposed to be used as a biological additive to diesel fuel and organic peroxide - as a reagent. The results of mixing process analysis, taking into account the differences between physical properties of palm oil and diesel fuel characteristics, are presented. The analysis was based on mathematical investigation. The effect of physical properties (density, dynamic viscosity, surface tension) of palm oil on the characteristics of mixing process has been examined. Changes in palm oil density, higher values of surface tension and dynamic viscosity have been observed. It was established that with increased density, surface tension and viscosity of palm oil, the average diameter of the drops increases, which should increase not only the ignition delay period, but also temperature sensitivity to the ignition process. With that the fuel jet dispersion angle and side surface decrease. A conclusion was made that in order to maintain the effectiveness of the diesel engine working cycle when switching to palm oil fuel, there is an obvious need for radical measures to substantially change its structure and fuel feed system. Palm oil is proposed to be used as an additive to diesel fuel and organic peroxide - as a reagent.

RUDN Journal of Engineering Researches. 2017;18(4):437-444
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ON DETERMINING TEMPERATURE CONDITIONS OF PIPELINES IN OIL-GATHERING SYSTEM
Guskova I.A., Khayarova D.R., Levanova E.V., Beloshapka I.E.
Abstract

The relevance of the task of examining such characteristics of protective coatings, as sedimentation, corrosion and heat resistance, is demonstrated. Protective coatings must be selected considering the temperature that affects their thermal resistance, so that the costs of carrying out various activities in order to remove organic sediments are reduced. The results of constructing a computer program to determine the temperature change of oil along a specified length of pipeline, for the sake of selecting the optimum type of protective coating to prevent corrosion and formation of organic sediments, are presented. The results of calculating the temperature distribution under given conditions and the length of the pipeline using the computer application “Automated system for calculating thermodynamic flow parameters” developed at the department “Development and operation of oil and gas fields” of the Almetyevsk State Oil Institute show the reasonability of applying protective coatings not only for the purpose of protection from corrosion and formation of organic deposits, but also to reduce the cooling rate of pumped oil products through the pipelines of oil-gathering system. The developed computer program allows to model the temperature conditions of pipelines in order to select the optimal coating system, taking into account the aspects that complicate transportation of oil and oil products.

RUDN Journal of Engineering Researches. 2017;18(4):445-453
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SURVEY ECONOMY AND THE STATE OF ALUMINUM IN THE WORLD AND IN THE REPUBLIC OF GUINEA
Abramov V.Y., Toure L.
Abstract

Aluminum is one of the most common metals in the earth’s crust. The mass concentration of aluminum in the earth’s crust according to various researchers is from 7,45 to 8,14%. Today, aluminum ranks is second in the world in terms of consumption among all metals, second only to steel, and the demand for it is constantly increasing. The main raw materials for processing aluminum plants are bauxites and nephelines. According to preliminary data of the International Institute of Aluminum, the world production of primary aluminum increased by 0,5% in 2016 and reached 58,167 million tons. The growth of the world’s population, the economic recovery, and the active urbanization of developing countries provide a stable demand for aluminum. Aluminum is widely used in construction, automotive, packaging and other areas. The growth in aluminum consumption is closely related to the growth in aluminum production. China is the leader of this metal producer. The company by the aluminum producer is Hongqiao. The pricing of metals on the world market is the London Metal Exchange LME, and aluminum prices will rise. The localization of the bauxite deposit on land is unevenly distributed; huge resources are concentrated in the tropical and subtropical areas. Among lateritic deposits, objects of the bowal type are of greatest industrial importance, and are widely distributed in Guinea, India. Brazil. In perspective, the Republic of Guinea can become a leader in the production of the world market. Bauxite in the territory of Guinea was first discovered by the A.Lacroix islands of the Loos archipelago at the beginning of the 20th century. Guinea has a very high quality inventory of bauxite more than half of the world’s resources. Given the pace of exploitation of bauxite in other countries, and in the coming decades, Guinea will become the main center for the production of alumina and even aluminum.

RUDN Journal of Engineering Researches. 2017;18(4):454-471
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APPLICATION OF CASING WHILE DRILLING TECHNOLOGY FOR ACCESSING HYDROCARBON PRODUCING HORIZONS
Malyukov V.P., Traore M.A.
Abstract

Applications of the innovative casing while drilling (or drilling while casing) technology for accessing producing horizons of hydrocarbon deposits are analyzed. The technology uses unique drilling rigs and downhole equipment that operates as an integrated drilling system in which standard casing pipes are used to transfer mechanical and hydraulic energy to the bit. The top drive system has recently become the most popular way of drilling oil and gas wells. The top drive systems are a fundamentally new type of drilling rig mechanisms that are designed to perform a whole series of technological operations. The need for downhole operations with the traditionally used drill string is eliminated by using the lower drill string assemblies that are lowered by the cable and connected to the casing string. The casing string can be used as the entire drill string or a part thereof in various ways. Various geological conditions in which this drilling method can be used (on land, on a shelf and under permafrost conditions) are considered, and also the practical experience of applying this technology in fields that differ in climatic and geological conditions is analyzed. The results of these test applications that show the effectiveness of the technology in drilling vertical, directional and horizontal wells are examined as well.

RUDN Journal of Engineering Researches. 2017;18(4):472-479
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FORMATION OF ZEOLITE DEPOSITS OF GAZAKH DEPRESSION (LESSER CAUCASUS)
Rasulova S.K., Baba-zadeh V.M., Belousov P.E., Mamedov M.N., Imamverdiyev N.A., Kerimov V.M., Vikentiev I.V.
Abstract

The paper deals with regularities of formation and location of zeolite-containing deposits of the Gazakh trough of the Lesser Caucasus. The Aydag deposit is located in the Tauz district of Azerbaijan, 7 km away from the Tauz city. The Aydag deposit productive stratum of natural zeolitized ash tuffs in combination with the same characteristics of the enclosing rocks can be classified as a complex deposit with a relatively non-uniform composition and structure of the productive stratum. The mineral and chemical compositions of zeolite-bearing rocks of the Aydag deposit have been thoroughly studied. Special feature of this deposit is the high content of clinoptilolite. According to X-ray diffractometry and mineralogical analysis of average samples, its content is around 70-80%. The porosity of this rock is around 15-20%, or even more, and does not depend on the stratigraphic level. It was found that the high-silica zeolitites of the Upper Cretaceous strata of the Lok-Karabagh zone belong to the hydrothermal-epigenetic type, which formed after the uplift of the enclosing strata, and generally the resource material for the formation of zeolites used to be volcanic glass of acidic, medium, rarely basic composition, contained in tuffs.

RUDN Journal of Engineering Researches. 2017;18(4):480-496
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PROSPECTIVITY OF KRASNOPOLYANSKY DISTRICT IN SOCHI (RUSSIA) FOR PRECIOUS METAL MINERALIZATION
Karelina E.V., Markov V.E., Blokov V.I.
Abstract

The article presents theoretical pre-requisites for gold mineralization in the Jurassic black shale strata of the Krasnaya Polyana geostructural zone of the North Caucasus. A brief historical review of investigation and extraction of gold in the area of the Mzymta and Shahe rivers was made. The search criteria and criteria of endogenous precious metal mineralization in black shale are identified: the presence of magmatic vein complexes in the region, lithostratigraphic and lithogeochemical barriers, deep-seated regional faults and other en echelon faults, sulphide mineralization. In 2013, during a geological field trip, the ore zone on the right side of the Mzymta River was located and investigated. Mineralized black shale and Mesozoic limestone cut through the intrusive body of gabbro-diorites, with a complex zonal structure. The microscopic analysis data showed that a significant part of the ore mineralization is represented by pyrite with globular structure, which is an important criterion in the genesis of sulfide deposits. Increased sulfide content, structural features of magmatic bodies, as well as chemical analysis data indicate their prospectivity for gold content.

RUDN Journal of Engineering Researches. 2017;18(4):497-504
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RESEARCH OF THE INFLUENCE OF THE GEOMETRY OF ORTHOGONAL RODS PLATES ON THEIR STRESS-STRAIN STATE
Anikeev I.D., Golikov A.V.
Abstract

In this work is studied the effect of the geometry of the rods plates on their stress-strain state. The rods plates with the cubic and pyramidal shape of the cell are considered in order to obtain the dependences of internal forces, deformations and frequencies of natural oscillations on the height of the plate and the aspect ratio of the plate. Spatial design schemes with a variation of the cell shape, the height of the plate, and the aspect ratio have been constructed. A static design is made of the unit load applied to the upper grid and the modal analysis. The values of the forces in the elements, the displacement of the nodes, the frequency and the shape of the natural oscillations are obtained. The graphs describing the dynamics of the stress-strain state change depending on the influencing factors are constructed.

RUDN Journal of Engineering Researches. 2017;18(4):505-517
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ORTHOGONAL CURVED COORDINATE SYSTEM AND FORMING THE SURFACES ON TRAPEZIUM-CURVED PLANS
Ivanov V.N., Imomnazarov T.S., Farhan I.T.
Abstract

Thin space constructions on curved plans there are used at building of public structures, trade centers. Sport constructions. Working-out the methods of forming of the surfaces on the curved plans that is one of the modern task of the architecture and town building. The orthogonal coordinate system that is formed at the plane with some plane directrix curve and the system of the right lines orthogonal to the directrix curve there is regarded at the stat. The coordinate system forms some trapezium-curved segment. Taking some function of the vertical coordinate there is possible to receive different surfaces at the curved plans. Conjugating different directrix curves, it’s possible to receive the combined surfaces. The article presents a system of orthogonal coordinates of curvilinear-trapezoidal planes and methods for forming surfaces on these planes. Surfaces with a function of the vertical coordinate of a general view are considered, and surfaces on combined plans of segments of the same type are shown.

RUDN Journal of Engineering Researches. 2017;18(4):518-527
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LOCATING MULTIFUNCTIONAL RESIDENTIAL COMPLEXES IN THE CITIES OF UNITED ARAB EMIRATES
Inshasi A.
Abstract

The article deals with the features of locating multi-functional residential complexes of various types in the urban conditions of the UAE. With the existing social differentiation in modern society, there is a need for design development and implementation of multi-functional residential complexes. All modern multi-functional residential complexes with services in the UAE are designed exclusively for people with high income. At the same time, practically, there are no multi-functional residential complexes with services for people with a small or medium income level. Constantly changing socio-economic factors of human life push to search for new promising ways to improve multi-functional housing and associated services.The author describes the optimal characteristics of different types of multi-functional residential complexes for different social groups of the population and the location of the multi-functional residential complexes depending on the distribution of these social groups in the cities of the UAE. Multi-functional residential complexes for people with high and medium incomes are considered. Through analyzing a limited sample of residential structures from various Emirates of the UAE, a regularity has been observed, indicating an optimal residential area per person in the UAE. In addition, optimal functional components for each type of such residential complexes are proposed. The criteria for locating them on different territories of cities are considered.

RUDN Journal of Engineering Researches. 2017;18(4):528-533
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THE ORIGINAL DESIGN OF THE PROJECT RECREATION AND TOURISM SMALL COMPLEX
Shuvalo V.M., Quazi Shibli Suman -.
Abstract

The article deals with the architectural design of the recreational and tourist complex “School traveler Fyodor Konyukhov” in the Domodedovo district of Moscow region, near the village Bityagovo. The paper notes the problem of quality recreation spaces and their organizations for teenagers analyzes the necessary steps to arrange such spaces on the basis of the bottom of the project where you will be training and preparing children and their parents to family travel. The basic concepts of architectural complex formation, given the technical characteristics of the project goals and objectives of the project. The main objectives of the project “clearing rallies”: spiritual and moral education; promoting tourism and a healthy lifestyle; the military-Patriotic upbringing of youth in spirit of devotion and love for his Homeland; physical training of children and youth to challenging treks and expeditions; the development of creative and sporting talent in children; help the youth in determining their life path. The plans of the investors of the project cultural events: organization of meetings of youth groups from all over Russia; celebration of important historical dates; the holding of thematic festivals and exhibitions; festivals and finding new talent; contests and events; creation Museum travelers and the Russian walk of Fame; the creation of children’s theatre; classes in astronomy with experts, workshops; planting and study of trees, shrubs, herbaceous plants, including medicinal.

RUDN Journal of Engineering Researches. 2017;18(4):534-540
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