Vol 4, No 1 (2010)
- Year: 2010
- Articles: 50
- URL: https://bakhtiniada.ru/2074-0530/issue/view/3814
Articles
6-10
Approximate Method for Calculating of the Noise of Internal Combustion Engine Exhaust
Abstract
The article considers an approximate method for calculation of noise of internal combustion engine exhaust, based on dependences between noise level and parameters of a gas stream in the muffler exhaust hood received by numerical calculations. The authors give errors of the offered method.
Izvestiya MGTU MAMI. 2010;4(1):11-14
11-14
14-19
19-22
Energy Accumulating Substances as Alternative Fuel for Gas-turbine Engines
Abstract
This article deals with the possibility of using of energy accumulating substances (EAS) as an alternative fuel for gas-turbine engines and power plants. Dual alloys of Si and Al are investigated as industrial EAS. The authors consider the conditions for their use for obtaining hydrogen from the water. Single-stage and two-stage methods of the EAS application are compared and evaluated. The conclusion is made about the need of further works on use of ЕAS for obtaining hydrogen from the water.
Izvestiya MGTU MAMI. 2010;4(1):22-25
22-25
Ignition Systems with Automatic Control of the Quality of Fuel Combustion in the Cylinders of Combustion Engines
Abstract
Decrease of secondary pressure on the ignition coil or fuel quality degradation leads to ignition-miss. For their elimination it is offered to add a contour which operates the quality of fuel combustion. Information for the management contour arrives from the gauges of ionic currents and electromagnetic radiation.
Izvestiya MGTU MAMI. 2010;4(1):25-34
25-34
Osobennosti protekaniya gidrodinamicheskikh protsessov v vysokonapornykh struynykh gidrousilitelyakh sistem upravleniya energoustanovok
Abstract
The article examines features of hydrodynamic processes in a running part of jet hydraulic boosters being part of servomotors of energy installations control systems. It is shown how geometric parameters of hydro-distributor jet pipe - intake plate and the presence of associated direct and reverse flows influence on changes of areas of pressurization and overflow in hydraulic booster's jet chamber.
Izvestiya MGTU MAMI. 2010;4(1):34-41
34-41
Construction of Multiaxial Vehicle Suspension Control
Abstract
The authors consider an example of application of the developed generalized functional approach to construction of multiaxial vehicle suspension management. The approach provides system and sequence in statement and decision of problems, reception of the materials which are necessary for design development cycle of systems of automated management of suspension.
Izvestiya MGTU MAMI. 2010;4(1):41-51
41-51
Estimation of tractors reliability on the basic of reclamation materials with use of the additional information
Abstract
The article examines opportunities of use of materials of reclamations for estimation of reliability of tractors. It is shown, that for reception of such estimations it is necessary to involve the additional information which is contained in source data. The developed algorithm of reliable interval forecasting for running time of a tractor from the moment of last failure and until the moment of carrying out of estimation (or the end of a guarantee) is described. The lead analysis has confirmed sufficient accuracy of received estimations of reliability.
Izvestiya MGTU MAMI. 2010;4(1):51-60
51-60
Determination of Critical Speeds of the Rotor of the Electric Pump
Abstract
Some questions connected to definition of critical speeds of a rotor of the electrical pump are discussed in the article. The examined system is complex elastic one with the distributed and concentrated masses. The considered rotor is based on two supports with anisotropic hardness. In such case the pump has 3D-motion. A method of initial parameters, in our opinion, is used by the most convenient at analysis of this elastic system.
Izvestiya MGTU MAMI. 2010;4(1):60-66
60-66
66-72
Dimensional Nonlinear Finite Element Model of the Front-Drive Car with Exhaust System
Abstract
This paper describes the volumetric nonlinear finite-element model of front-wheel drive car with exhaust system for NVH analysis. This model provides adequacy and may be used for the engine mounts optimization with the purpose increasing of a front-wheel drive car vibration comfort
Izvestiya MGTU MAMI. 2010;4(1):72-77
72-77
Selection of Optimal Design for Mechanical Part of Electric Transmission for 8x8 Special Wheeled Chassis
Abstract
The article describes design features of electrical transmission for special wheeled chassis. When designing cars with electrical transmission one of the challenges is to provide the required traction and speed. The authors propose to solve this problem by selecting optimal parameters of mechanical part of electric transmission.
Izvestiya MGTU MAMI. 2010;4(1):78-82
78-82
Surface Hardening of Casting in Production Proccess
Abstract
The paper presents the results of experimental research on deposition of wear-resistant chrome-diffusive coatings on the rocker arm shaft support in the process of shell molding. When liquid metal contacts saturated media, on the surface of the form the chrome-carbide diffusive layer 80... 120 mcm. thick with high wear-resistant characteristics being generated. The actual tests of the rocker arm shaft support with the mentioned coating showed that it exceeds at 2,5 times in wearing capacity the current models. The diffusive hardening technology is adopted for implementation at the manufacturing plant.
Izvestiya MGTU MAMI. 2010;4(1):83-85
83-85
Electrohydraulic Perforating Machine
Abstract
The paper presents the design of electrohydraulic perforating machine based on "Yutkin effect, also known as electrohydraulic effect (EHE). This EHE perforating machine has high reliability and efficiency (compared with the known analogues). The use of EHE perforating machine will allow adjusting impact value and frequency in automatic regime, reducing of increased noiseness; increasing of ecological safety. To explore the possibilities of the developed device the of EHE perforating machine laboratory facility was designed. It was used to test its mode of functioning and performance.
Izvestiya MGTU MAMI. 2010;4(1):85-92
85-92
Robotization of Screwing of Fastening and Thread Parts
Abstract
The paper examines actual problems of assembly operations robotization. The particular stress is made on screwing of fastening and thread parts. The importance of fastening parts standardization, assuring of robots location accuracy, orientation and location of parts, assembly modes control is substantiated. The paper describes the current level of robotization at the mechanical engineering enterprise. Promising ways and methods of the solution of the mentioned problems are offered. The paper presents the manipulator automatic control system.
Izvestiya MGTU MAMI. 2010;4(1):92-96
92-96
Production of EP742 Alloy Blanks with Fine-grained Structure for Subsequent Isothermal Rolling
Abstract
The paper presents jet engine disk forming methods by local deforming load and results of the thermal and plastic deformation which provides the required fine-grain structure. The author substantiates the necessity of content of fine-grain structure in the blanks made of nickel-based alloy for the isothermal rolling.
Izvestiya MGTU MAMI. 2010;4(1):96-99
96-99
Working Capacity Enhancement of Cutting Tools in Terms of Machining of Difficult-to-cut Materials by Complex Application of Wear-resistant Coating and Hard Alloy
Abstract
The paper describes the results of research of cutting properties of hard alloys WC-Co-carbides with Ti-(Ti,Al)N-TiN coating when turning of structural steels and hard-to-machine nickel alloys. Due to combination of high temperature toughness of carbide and wear resistant coating tools cutting properties increase in several times.
Izvestiya MGTU MAMI. 2010;4(1):99-106
99-106
Durability of Circular Broaches for Cylindrical Tooth Gears Machining
Abstract
The paper examines the influence of high-speed steel grades and technology factors on wear and durability of circular broaches when machining of tooth rims of cylindrical wheels by circular broaches. The data of experimental research of wear of cutting teeth of broaches is given. Empirical dependences by calculation of optimum speed of broaches are given. Recommendations for increase of durability of broaches are given.
Izvestiya MGTU MAMI. 2010;4(1):106-109
106-109
Technological Measures to Improve Automotive Product Quality
Abstract
The paper examines the basic technological measures aimed at improving product quality in automotive industry. While paying due attention to solving organizational and technological problems, including the development of certification systems for production processes, it is also necessary to improve the technical standards of specific technologies, equipment and materials as they largely determine product quality. Special emphasis is given to the importance of improving the production of automobile components and engines.
Izvestiya MGTU MAMI. 2010;4(1):110-113
110-113
Special Purpose Tool for High-precision Honing of Cylinder Block Liner
Abstract
The paper presents the design of a special tool for high-precision honing of cylinder blocks liners of various types and models of internal combustion engines. This tool allows to finish a wide range of diameters without repurposing, by using two-stage planetary transmission and device for microsupply of honing blocks.
Izvestiya MGTU MAMI. 2010;4(1):113-116
113-116
Algorithmization Principles of Machining Datum Surface Select
Abstract
With computer aided design process of mechanical-processing parts (CAD / CAM systems), the datum select is of great importance in terms of providing the required accuracy and the calculation of optimal allowances. While designing the algorithm for selecting, drawing appears as the basic element of procedure, so it is important to put all the manifold parts to rights, or to classify it. The structure of selection algorithm has been reduced to two successive interrelated branches that include the maximum unified sequence of blocks (stages). The algorithm is implemented in the program for the PC in the module "CAD drawing casting and tested on the castings in road parts.
Izvestiya MGTU MAMI. 2010;4(1):116-119
116-119
Intelligent Materials Based on Ceramic Composites
Abstract
The paper examines the possibility to design intellectual materials based on film composites. Ferroelectric composites are offered to use as the film composites. The authors discuss ferroelectric composites of different structures. Sensors and intellectual materials on the basis of the obtained composites are considered.
Izvestiya MGTU MAMI. 2010;4(1):119-126
119-126
On the Issue of Particularities of Design and Simulation of Welded Constructions of Machine's Basic Parts
Abstract
In current conditions of machine industry competitive strength of firms effectively to make the process equipment has an essential value. It predetermines the necessity of wide application of welded constructions of machine tools basic parts. The solution of this task involves development o technique permitting to calculate and optimize the basic parts of machine tools depending on conditions in each case. In the present paper the results of research of deflected mode of machine tool basic parts are examined.
Izvestiya MGTU MAMI. 2010;4(1):126-132
126-132
Capability Check of the Cutting Tool by Method of Final Elements
Abstract
The paper describes a comparative analysis of the classical approach to definition of the physical-mechanical tool material properties and the mathematical analysis by finite elements method with modeling use in program complex ANSYS. The results confirmed the efficiency of the accepted approach to definition of the tool characteristics at high-speed processing.
Izvestiya MGTU MAMI. 2010;4(1):132-135
132-135
Sandwich Foamed Aluminum Panels. Prospects of application
Abstract
In this paper the advantages and disadvantages of the main types of sandwich panels are describe. Aluminum foam sandwiches are analyzed. As the result of this study, we can see that aluminum foams provide metallic sandwich panels with new abilities and open new fields for their applications, that gives engineers a new material to solve their problems more efficiently.
Izvestiya MGTU MAMI. 2010;4(1):136-147
136-147
Control of Ferroimpurities by Test Extrapolation Operations of Magnetophoresis
Abstract
The paper shows the possibility of extrapolation of diminishing relation of operation-by-operation mass of ferroparticles to number of magnetophoresis operations. It allows defining the residual mass of ferroimpurities, so the total (potential) mass and concentration of ferroparticles in analyzed medium.
Izvestiya MGTU MAMI. 2010;4(1):148-158
148-158
Influence of Occilations in Sectional Shape of Non-rigid Parts Quill Cylinder Type on the Cutting Force in the Process of Combined Machining and Surface Plastic Deformation
Abstract
The crosscutting strength leads to deformation of the part cross-sectional view while being combined machining of non-rigid smooth hollow cylinder parts. But the deformation magnitude is so small that it can be neglected in further calculations.
Izvestiya MGTU MAMI. 2010;4(1):158-162
158-162
162-166
Experimental Investigation of Mechanical Properties of Damping Material
Abstract
The paper presents research of deformation features of a multilayered material with resilient and elastic connective layer. Data on comparison of hardening curves with various geometrical parameters of the sample are obtained. Particularities of shear of connecting layer are revealed. The paper makes emphasis on major influence of deformation speed on power characteristics of shear process.
Izvestiya MGTU MAMI. 2010;4(1):166-170
166-170
Waste-water Treatment at Machine-building Enterprises
Abstract
Analysis and evaluation of project documentation of construction of wastewater treatment facilities of industrial enterprises showed that the purification of industrial wastewater and surface waste water must be carried out at different treatment plants with different cleaning lines. The paper also reveals that the calculation determining the weighted average concentrations of pollutants in surface sewage is carried out incorrectly. The author proposes an improved method for determining the initial concentration of pollutants in surface wastewater.
Izvestiya MGTU MAMI. 2010;4(1):170-174
170-174
Use of Compleons for Environmentally Friendly Processes of Dissolution of Iron-Oxide Deposits
Abstract
The article considers the influence of OEDF and EDTA on the rate of dissolution of magnetite with the varied conditions for experiment. It is shown that the effectiveness of action both nitrogen- and phosphorus-containing complexon comes to a change in the value of potential on the border of the division of phases oxide/solution. As a result of kinetic study nature of the potential-determining reaction is revealed, which is determined by the following equation: .
Izvestiya MGTU MAMI. 2010;4(1):175-181
175-181
Spreading of a Thin Plastic Layer
Abstract
Common target setting for thin layer flow problem is considered in the article. Due to pressure from thin layer to contact area is defined per simple integration main task of that problem is cinematic definition of current line and area boundary. Flow equation is researched in automodel solution class. That is meant such solution of nonlinear partial derivative equation whose type is determined per integration of some ordinary differential equations.
Izvestiya MGTU MAMI. 2010;4(1):181-185
181-185
Biharmonic Modulated Axially Symmetric Shapes of Cylindrical Shells and the Critical Lines and Points on the Loading Path on the Linear Theory
Abstract
The article examanies a generalized formulation of the conditions and an analysis of the critical state of shells under the action of external parameter evolving axisymmetric longitudinal loads. Generalized formulation includes a task in the space of coefficients of differential equation of the trajectory of loading and critical states. Critical states of the shell associated with the loading trajectory reach of the characteristic lines and points. The characteristic lines and points include the line dividing the modulation, level lines of squares of natural frequencies (wavelength) and the points of orthogonality or isogonality (isocline).
Izvestiya MGTU MAMI. 2010;4(1):185-199
185-199
Problem of the Plate Flatter in Nonlinear Geometry Arrangement
Abstract
Authors analyzed the nonlinear arrangement for the problem of elastic plate set in supersonic gas flow with velocity vector directed at small angle to its plane. The critical velocity of the flow was estimated at different values of the operations factors, the results were compared.
Izvestiya MGTU MAMI. 2010;4(1):199-202
199-202
Estimation Model for Financial Viability of Mmachine-building Enterprise in Restructing Strategy Planning
Abstract
In present rapidly changing economic conditions to survive and preserve its long-term competitiveness, machine-building enterprise should constantly modify its activities. This should be done not only in the context of the emerged crisis, but even when the situation can be still estimated as normal. This circumstance is outlined in the given paper, which offers a methodical approach to estimation of financial viability of an enterprise. This approach will enable administration to respond quickly to changes of current production status.
Izvestiya MGTU MAMI. 2010;4(1):203-210
203-210
Information Component of Competitiveness Recovery of Russian Small and Medium Enterprises
Abstract
The paper considers the problems of competitiveness recovery of small and medium enterprises (SMEs). As a tool to solve these problems we propose to use the International financial reporting standards (IFRS) for SMEs. It is also shown that application of the given standards by the Russian SMEs will allow them to create the high-quality information basis. Such information is characterized with demanded completeness of financial position and results of a company business. Also, we analyzed the basic differences between IFRS for SMEs from «full IFRS» and named the basic advantages of application IFRS for SMEs. We also consider prospects and difficulties of adoption of the given standards in Russia.
Izvestiya MGTU MAMI. 2010;4(1):210-214
210-214
General Regularities of Complex Dynamic Systems Operation
Abstract
The paper examines current issues related to the underpinnings of the functioning of dynamic systems, the general laws of governance which also apply to economic systems. As part of developing a systematic approach to management of national economies, taking into account the economic, social and ecological components, set priorities for research.
Izvestiya MGTU MAMI. 2010;4(1):214-218
214-218
Problems of Modernization of Russia: General Questions and Political Background
Abstract
Russia is going through the difficult period. It faces a number of challenges: political, social, economic and ideological ones. In all these spheres the country lags behind the advanced states and modernization is on the agenda at the moment.
Izvestiya MGTU MAMI. 2010;4(1):218-224
218-224
The Issues of Industrial Cycles Modeling in the National Economy
Abstract
The paper covers the predominant factors significantly influencing the crisis in the national economy. The causes of crises are disclosed, theoretical studies of the origin of crises are presented. Mathematical model for the forecasting of the time for the beginning of major destructive processes in the financial sector and in the economy is described.
Izvestiya MGTU MAMI. 2010;4(1):224-229
224-229
229-232
232-234
234-238
Problems and Prospects of Development of Economic Specialties in Technical Universities
Abstract
The educational system is a compound social-economic, scientific and technical complex of Russia's national economy. Current trends in the market of educational services are based on multidisciplinary requirements for specialists. Preparation of highly skilled personnel has become one of the most important factors of economic progress. Increase of competitiveness of the university, its graduates and, as consequence, the profile industry development (automotive engineering) will undoubtedly cause growth of demand for educational services of the Moscow State Technical University "МАМI".
Izvestiya MGTU MAMI. 2010;4(1):239-241
239-241
The Content and Methods of Intercultural Competence Formation in Language Training of Economic Student
Abstract
The authors' attention focuses on the formation of intercultural competence in informational and practical areas as one of the most important conditions for the implementation of foreign language communication. There are analysis of intercultural interaction, determines socio-cultural discommunications specifying their causes. The expediency of developing science-based ways to create an integrated system of language training of economic faculty students are grounded.
Izvestiya MGTU MAMI. 2010;4(1):242-244
242-244
244-246
Quantification of Technical and Tactical Skill of Athletes
Abstract
The study is focused on the issue of quantitative and qualitative determination of technical and tactical qualification of wrestlers. The proposed equations of simple and multiple regression can reveal the individual performance of each wrestler. It provides individual and group control of athletes in preparation for specific competition.
Izvestiya MGTU MAMI. 2010;4(1):247-250
247-250
250-254
Innovative Technologies in Educational Process for Preparation of Engineering Students
Abstract
The article examines the use of mathematical editor MathCad, extending the scientific side of the discipline "Chemistry" for students of engineering specialties MSTU "MAMI". The authors give the examples of the use of this mathematical product in the laboratory workshops. Effective change of their content based on modern methods of investigation is shown. This method is the simulation of physical and chemical processes, which makes it possible to trace the dynamics of change in motivation of students to the priority of a future profession.
Izvestiya MGTU MAMI. 2010;4(1):254-258
254-258
Russian Language and Speech Standards as a Significant Component in Educational Program of Technical University
Abstract
Article is devoted to the significance of the course "Russian language and culture of speech" in the educational program of the Technical University. The author uses material from the new research devoted to modern higher education in Russia. The article also presents the student surveys. The author concludes: the better young professionals speak the native speech, the better they meet the requirements of modern society.
Izvestiya MGTU MAMI. 2010;4(1):258-262
258-262