卷 3, 编号 2 (2009)
- 年: 2009
- 文章: 47
- URL: https://medbiosci.ru/2074-0530/issue/view/3813
Articles
Calculation of Static and Special Load on Undercarriage of Armoured Vehicles including Weld Joint Properties
摘要
The article presents the results of strength calculations for armoured vehicles under static and dynamic load. Authors consider features relating to material selection, evaluation of weld joint and bolt joint strength. Calculations enabled to define efficient structure parameters and acceptable static and dynamic load.
Izvestiya MGTU MAMI. 2009;3(2):9-15
9-15
Adaptive Trailer Control System
摘要
The article describes the algorithm of the adaptive trailer control system for huge trucks. The system includes corrective control channel for optimization of the lateral displacement of the semitrailer relative to the trajectory oh the truck. Author used LMS Virtual.Lab Motion software for the algorithm's refinement.
Izvestiya MGTU MAMI. 2009;3(2):15-22
15-22
Damping of Torsional Vibrations of Transmission
摘要
Torsional vibrations of transmission of the car are dampened by friction introduction in the torsional damper which connects the engine and transmission. It is a complicated and labour-consuming method not always bringing the necessary effect. It is offered to dampen torsional vibrations by dropping of the damper rigidity to a quantity at which the amplitude of vibration of the torque becomes less than the friction in transmission what eliminates vibrations.
Izvestiya MGTU MAMI. 2009;3(2):22-26
22-26
Influence of Axial Adjustment Force in Universal Ball Joint on vibrational load of front-wheel drive vehicle power unit
摘要
The technical article presents compensating axial force dependent on transmitting engine torque, suspension displacement and constant velocity joint design. Also authors showed influence of powertrain vibration on compensating axial force.
Izvestiya MGTU MAMI. 2009;3(2):26-31
26-31
Increase of effectiveness of two-shaft gas-turbine power units
摘要
The article describes the process of creation of a flow model of two-shaft gas-turbine power turbine with regulated vanes. Influence of meridional profile variants on isentropic turbine efficiency is shown. Calculations were carried out in three-dimensional statement taking into account turbulence and real properties of gas The characteristics of the turbine well coinciding with experimental data are received. Authors have plans of next steps for modernization calculation model.
Izvestiya MGTU MAMI. 2009;3(2):31-38
31-38
Mathematical Simulation of Automotive Pollution Spreading by Control Volume Method
摘要
The paper considers an approach for pollution modeling from motor transport. It is based on equations written at universal form what allows to simplify the modeling process. The numerical realization is based on control volume method. The algorithm and computational results for distribution of pollution from motor transport are presented.
Izvestiya MGTU MAMI. 2009;3(2):38-46
38-46
Simulation of multiaxle truck ride control
摘要
The article presents the mathematical model for research of multiaxle truck suspension systems.
Izvestiya MGTU MAMI. 2009;3(2):46-52
46-52
Piston Engine with Internal Recuperation of Exhaust Gases
摘要
The article considers the way of increasing of internal combustion engine fuel economy by means of internal use of exhaust heat energy.
Izvestiya MGTU MAMI. 2009;3(2):52-56
52-56
Kinematics of Crank Gear with Two Crankshafts
摘要
The article presents an engineering solution for a crank-and-rod mechanism with duplex kinematical connections, methods of determining kinematic parameters for an eccentric crank-and-rod mechanism.
Izvestiya MGTU MAMI. 2009;3(2):56-63
56-63
Theoretical and Practical Aspects of Tractor Speed Control Automation
摘要
The article summarizes theoretical and methodological aspects of building of tractor speed control automation. Control aims are turned into several routine problems typical for specific technilogical processes operated by tractor units.
Izvestiya MGTU MAMI. 2009;3(2):63-69
63-69
Numerical modelling of the temperature fields in coolant jacket of internal combustion engine
摘要
The article is devoted to numerical modelling of the heat flow in coolant jacket of an internal combustion engine. The basic methods of fluid flow researching and temperature fields researching are described. The solving technique of 3D solid heat-fluid finite element model of one cylinder of V8 diesel creation is revealed. Temperature fields, thermal flow in solid parts, boiling places near hot parts are described also.
Izvestiya MGTU MAMI. 2009;3(2):69-79
69-79
Experimental investigations of ЯМЗ-236НЕ diesel engine operating on В20 mix and В100 pure biodiesel fuel
摘要
The article presents comparison test results of ЯМЗ-236НЕ2-3 diesel engine operating on diesel fuel, on mix and pure biodiesel fuel in standard version and with upgrade fuel system and optimized injection lead angle. Corresponding adaptation for biodiesel fuel operation enables maximum torque and nominal power on the same level as for diesel fuel and fuel efficiency increase.
Izvestiya MGTU MAMI. 2009;3(2):79-84
79-84
Motor Transport Systems Sustainability Management Based on Safety and Effectiveness Criteria
摘要
Methodology of formulation and solution of modern functional tasks of motor transport systems sustainability at economy structural transformation conditions including emergency and crisis situations based on safety and effectiveness criteria is considered. Motor transport system is scrutinized as persistent process of risk and motor transport technical level management.
Izvestiya MGTU MAMI. 2009;3(2):84-93
84-93
Fuel supply system with electrohydraulic effect
摘要
The article is dedicated to research of application of electrohydraulic discharge in diesel fuel systems. The electrohydrodynamic pump is developed in MSTU «MAMI» and RMAI, it excepts the shortcomings of fuel systems containing plunger pump of high pressure and can be used in Common Rail fuel systems of diesel engines as a pump of high pressure.
Izvestiya MGTU MAMI. 2009;3(2):93-102
93-102
Discrete power alteration of internal combustion engines
摘要
The article describes the method of discrete change of internal-combustion engine power capacity. It is developed on the basis of realization of expanded engine cylinders work sequence for fractional load mode and idle mode.
Izvestiya MGTU MAMI. 2009;3(2):103-108
103-108
Hydrostatic transmission application in automotive vehicles
摘要
The article gives an analysis of several main variants of hydrokinematic layouts enabling maximum realization of potential advantages of hydrostatic transmissions.
Izvestiya MGTU MAMI. 2009;3(2):108-115
108-115
Integrated assessment of power distribution law influence on operating characteristics of allwheel drive vehicle
摘要
The article contains main statements of complex analysis for all-wheel drive power distribution. There are presented: the explanation of need in scientific research in the field of transmission parameters influence on characteristics of control, stability and fuel economy, the problems concerning creation of unified mathematical model of vehicle's moving, the arrangement and solution of optimization problem. Authors show the main results of experimental and analytical study, the estimation of obtained appropriateness, the recommendations for various conditions of moving.
Izvestiya MGTU MAMI. 2009;3(2):115-122
115-122
Experience and prospect of development and approbation of combined machining of non-rigid shafts
摘要
The paper examines the dimension making procedure for combined cutting-deforming part process of flexible shafts. The best way to remove the flexibly-restored metal is to use the tools with zero cutting rim. In terms of micro geometry of the part surface the cross-section of cutter plate influences the cross-section of the surface.
Izvestiya MGTU MAMI. 2009;3(2):123-125
123-125
On the question of influence of geometrical perfection parameters of the surface of the workpiece
摘要
The paper presents the research of dependence of micro- and macrogeometry of work surface on the geometrical perfection parameters with the help of mathematical model of broaching process.
Izvestiya MGTU MAMI. 2009;3(2):125-130
125-130
The determination of influence of applied lubricant on the physical-mechanical properties of bore surface layer
摘要
The paper presents the research on influence of applied lubricant on the physical-mechanical properties of bore surface layer under the deforming broaching based on the following factors: surface hardness - (Нμ); surface hardening - δsurface; maximum hardness - HVmax; maximum depth of hardened layer- h; allocation microhardness. It is found that the application of metal-plate lubricants influences positively on all the indices.
Izvestiya MGTU MAMI. 2009;3(2):130-136
130-136
Influence of a method of gear treatment on durability on a bend of teeth of cylindrical wheels of automobiles and tractors
摘要
Principal causes of failure of cylindrical cogwheels of automobiles and tractors are considered. Influence of radius of a transitive curve on durability on a bend a tooth of a wheel is shown. The design procedure of radius of a transitive curve is given at processing wheels by methods of running-in and copying. It is shown, that the method of copying allows to increase radius of a transitive curve, and, hence, and durability of a tooth by a bend. On the basis of the comparative analysis characteristics of durability the automobile and tractor cogwheels processed by methods of running-in and copying, it is shown, that the method of copying allows to raise (increase) durability of a tooth of a wheel on a bend on 10 … 15 %.
Izvestiya MGTU MAMI. 2009;3(2):136-141
136-141
Оscillations under cutting-deforming flexible shafts work
摘要
In the present-day machine-building creating of high-performance machining processes, subject to the requirements of resources, energy and ecology is one of the most important problems. The part of parameters of the mathematical model remained constant, while others varied. The research result contain arithmetical mean working errors of cross-sections of the part, calculated for ten equidistant points of each cross section, as well as an arithmetic mean and quadratic deviation of error. The subject of research is the technology system of combined cutting-deforming proccessing, because manufacturing application of this method shows its great potential in achieving of high quality and performance.
Izvestiya MGTU MAMI. 2009;3(2):141-143
141-143
On the analysis of cutting process mechanics. Cutting with a flattened edge tool
摘要
The paper analyses the cutting mechanics of strain-hardening material with the flattened cutting edge tools. The authors present the cutting pattern and velocity vector diagram, according to which the cutting process is regarded as combination of two simultaneous acts of plastic deformation: chip formation and machined surface smoothing. The analysis is performed by strain energy method with the use of extreme principles of deformation mechanics. The authors obtained the physical quotations which describe the cutting mechanics in real-life conditions of contact friction subject to the tool geometrical parameters, including the dulling radius of the cutting edge.
Izvestiya MGTU MAMI. 2009;3(2):143-151
143-151
Characteristics of zones of ferro-admixture capture in magnetic cleaning units
摘要
The authors obtained and analyzed the new characteristics of working zones of perspective magnetic separators for cleaning of granulated and liquid media. Those characteristics give information about principal features of such zones, very important by creation of industrial cleaning machines.
Izvestiya MGTU MAMI. 2009;3(2):151-160
151-160
Study method for structure forming of metal for data accessing for control of solidification of products, crystallizing in two-phase zone
摘要
The study method of structure forming in the uniform (physically small, elementary) volume of the two phase zone of binary alloys without any outer influence has been investigated. The results obtained show the close connection kinetics and development morphology of dendritic structure of the alloys under investigation with the level of the diffusion overcooling with the two phase zone. The similarity principle of the diffusion overcooling changing within the two phase zone in the process of the given alloys crystallization has been found out. The concept of the typical temperature for the two phase zone has been defined and introduced.
Izvestiya MGTU MAMI. 2009;3(2):160-167
160-167
Study of damping properties, thermal and strength characteristics of anaerobic materials
摘要
The article presents the results of experiments involved in investigation of a set of properties of anaerobic material. The tests demonstrated empirical dependence of the joint efficiency on the scale factor, type of tested load, activity of materials to be bonded, polymerization time. The article reveals the factors affecting the joint efficiency, and proposes methodology for calculation of adhesion coefficient for various brands of anaerobic materials. It determines the impact of thermophysical properties on joint strength, and establishes their limiting values. It was established that the damping capacity of anaerobic materials is to be taken into account when certain filling compounds are added to them. The investigation extends the application of anaerobic materials in assembling.
Izvestiya MGTU MAMI. 2009;3(2):167-174
167-174
Analysis of the kinematics and dynamics of balls during lapping by built-up tools
摘要
Construction of tools for lapping balls between coaxially installed lower drive disk and overhead stationary disk with concentric rings is described. Analytical dependencies necessary for calculation of the angular velocity and sliding velocity of the balls have been obtained. The cohesive and friction forces acting on the balls in machining zone have been determined. The conditions have been required for changing the position of the instantaneous axis of the ball rotation.
Izvestiya MGTU MAMI. 2009;3(2):174-184
174-184
On the issue of interaction between the abrasive polymer brush's fiber and the treating surfaces
摘要
In this article there were examined the questions of interaction between the abrasive polymer brush's fibre and the treating surfaces. There were cited experiment's data about the examination of fibre's elasticity
Izvestiya MGTU MAMI. 2009;3(2):184-187
184-187
Dependence of cutting depth on sectional shape error during combined treatment of non-rigid parts of quill cylinder type
摘要
The imprecisions of the cross-sectional view geometry of non-rigid smooth hollow cylinder parts impact on cutting depth correction while combined machining. The cutting depth correction leads to the cutting force that undermines on dimension parameters of the combined machining of parts.
Izvestiya MGTU MAMI. 2009;3(2):188-192
188-192
Cutting parameters at needle-milling
摘要
In article is open the questions wire brash, its specific and advantage in comparison with other ways of performance of operations of preparation of surfaces of preparations for anticorrosive covering of metal, welding by explosion etc. In article are consider еhe questions of the basic parameters of cutting at wire brash and on what they depend, and as a choice of modes of cutting, their influence on quality of a surface and productivity of process.
Izvestiya MGTU MAMI. 2009;3(2):192-195
192-195
Effectiveness increase of retrieval system by optimization of material flows at the production area of mechanical assembly production
摘要
There is a description of the question of a decrease in costs for transportation of products in machine-assembling production in this article. This decrease is based on the procedure, which is offered by the author and is founded on optimization of material streams on a production section due to a rational arrangement of the equipment on it. The developed procedure of construction of schemes of an arrangement of the manufacturing equipment on production sections can be used not only at designing of cell-type systems, but also at their operation due to rearrangement machines under conditions of changing of listed products, providing thus a planning flexibility of production.
Izvestiya MGTU MAMI. 2009;3(2):195-201
195-201
Effective designing of means of technological equipment by the automated preparation of machine-building manufacture
摘要
Application of engineering methods of mathematical modeling of engineering systems and products based on the theory of polychromatic sets and graphs improves the efficiency of the production cycle. This approach allows to automate the design and technological pre-production, as well as improve the quality of products while reducing its cost.
Izvestiya MGTU MAMI. 2009;3(2):202-209
202-209
New method of solid centrifugal planetary machining
摘要
Increase of efficiency of the finishing operations defining operational characteristics of products is considered. The new way of method of solid centrifugal planetary machining under the influence of oscillation speed. The parities regulating efficiency of a way are received and borders of technology factors in which processing should be made that has allowed to raise stability and productivity of process of volume processing of details in containers with epicyclic rotation are defined and has created conditions for formation of homogeneous qualitative characteristics of a surface on a difficult contour of details.
Izvestiya MGTU MAMI. 2009;3(2):209-213
209-213
Regularization of ill-conditioned problems in geometrical measurements
摘要
In measurements of small segments of geometrical objects such as circles, spheres, cylinders etc., object parameters are defined with large errors, that can essentially exceed both errors in the part manufacturing and errors in measurements. That's why such measurements could not be performed on coordinate measurement machines (CMM), but in the same time there is a great requirement in them in industry. Large errors are caused by ill-conditioned problem of small segments measurements. The method allowing to improve conditionality of considered problems by their mathematical regularization and to raise decision accuracy is described in this article. Offered method expands CMM possibilities, allowing to perform measurements that were not performed on them earlier.
Izvestiya MGTU MAMI. 2009;3(2):214-219
214-219
Ecological features of carbonate deposit removal from the surface of manufacturing equipment
摘要
The paper examines the kinetics and mechanism of calcite dissolution in different рН. The diagram of ions distribution subject to the state of medium is given. The simulation of the kinetic curves of dissolution subject to the structure of dual electrical layer and acid-base characteristics of calcite has been carried out.
Izvestiya MGTU MAMI. 2009;3(2):220-227
220-227
Program construction of stability range
摘要
The paper considers the technique which allows estimating the borders of stability subject to p- parameter of transfer function of the open-loop system. For calculations the MathCad is used.
Izvestiya MGTU MAMI. 2009;3(2):228-231
228-231
The technique of construction of control system for biological sewage treatment technological process on the basis of hybrid neural networks
摘要
The paper describes the technique of construction of control system for technological process of the sewage treatment, based on the use of the hybrid neural networks presented in Matlab software on the basis of the ANFIS-editor of the Fuzzy package of indistinct logic. The application of the given method appears to be rather effective in the absence of sufficient volume of a trustworthy information about the given process, and also in conditions of uncertainty complicating the automation of the given process.
Izvestiya MGTU MAMI. 2009;3(2):231-241
231-241
An incremental geometrically nonlinear finite element membrane model of sheet metal forming processes under action of rigid tools
摘要
An incremental finite element membrane model for the analysis of sheet metal forming processes under action of rigid tools is developed on the basis of a flat triangular element with the linear law of displacements' distribution. The nonlinear effects due to the changes in shell geometry and contact states during each incremental step are taken into account. An example on square punch stretching of metal sheet is considered.
Izvestiya MGTU MAMI. 2009;3(2):241-247
241-247
Inventory management at the machine-building enterprises from the position of logistics
摘要
The paper deals with a number of problems related to disadvantages of controlling storage at the Russian industrial and their consequences at the machine-building enterprises. Different options for defining the strategy of controlling storage in terms of logistics are provided. The authors consider the efficiency of the given options.
Izvestiya MGTU MAMI. 2009;3(2):248-255
248-255
Role and importance of financial information processing during managerial decision-making at the enterprise
摘要
The paper considers information as an instrument for effective decision-making. To analyze the information there are the reasons to create an automated system for its processing in order to obtain integral estimation of business and financial activities of the enterprise characterizing effectiveness of its management.
Izvestiya MGTU MAMI. 2009;3(2):255-260
255-260
Development of automotive industry clusters as a factor of social-economic development of the region
摘要
The paper considers the questions of interrelations of automotive industry clusters development and social and economic regional indicators. The correlation-regression analysis of indicators' dynamics has been carried out by the examples of Rostov (FPG Doninvest) and Kaliningrad (Autotor business group) regions.
Izvestiya MGTU MAMI. 2009;3(2):260-264
260-264
Universitetskoe obrazovanie. Istoricheskiy opyt i sovremennye podkhody
Izvestiya MGTU MAMI. 2009;3(2):264-268
264-268
On the opposition of two trends in Russian political and economical systems
摘要
Political and economical configuration of two contemporary systems of the Russian society is characterized by the effect of two opposite trends: 1) towards authoritarian power and 2) towards liberalism.
Izvestiya MGTU MAMI. 2009;3(2):268-271
268-271
New instrument of competitive recovery of enterprises for present Russia
摘要
In process of globalisation development the competition intensifies, getting global character and reaching the hypercompetition level. The aspiration of achievement of competitiveness, proceeding from the developed best world levels defining it becomes a main goal for the majority of the countries, transnational and national companies. The effective instrument for this purpose is benchmarking that helps company to meet world market requirements.
Izvestiya MGTU MAMI. 2009;3(2):271-278
271-278
Training of modern specialists in higher professional education
摘要
The connection between the economic and cultural state of the society and the educational system is analyzed in the article. The actions for satisfying the social demand in well - trained and qualified specialists are suggested.
Izvestiya MGTU MAMI. 2009;3(2):279-282
279-282
On the issue of possibilities of educational process at the solution of applied problems
摘要
In article is described a technique of teaching of special disciplines to students 3-4 courses in modern conditions. The basic conclusion by the given technique consists that the engineer cannot be prepared qualitatively for work in the modern industry sated with hi-tech techniques without developing in it of skills of scientific work, and skills of work as the expert, on what that to a narrow special question. As a special question, in the course of performance laboratory and term papers, work by definition of quality of mobile phones and requirements of various groups of buyers to qualitative characteristics of these phones has been offered students.
Izvestiya MGTU MAMI. 2009;3(2):282-289
282-289
Development the techniques of distance laboratory works on the example of programming C language
摘要
In given article the problem of distance laboratory works in the subjects is considered, allowing performing the given laboratory works in house conditions. Merits and demerits of the given method are shown. As an example, the technique of remote training of students at the rate "Programming" is resulted. The course is designed for laboratory works within the limits of base studying of "C" language for 2-3 semester with the use of free programs.
Izvestiya MGTU MAMI. 2009;3(2):289-296
289-296