Mechanics of Machines, Mechanisms and Materials, 2008, No.1

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Mechanics of Machines, Mechanisms and Materials, 2008, No.1

MECHANICS OF MACHINES, MECHANISMS AND MATERIALS
International Scientific and Technical Journal
Published by The Joint Institute of Machine Building of the National Academy of Sciences of Belarus, Minsk, Belarus

Number 1(2); 2008

MECHANICS OF MATERIALS AND CONSTRUCTIONS

EDITOR NOTE

Academician M.S. Vysotsky's Report at the First Congress of Scientists of the Republic of Belarus. pp. 5--8.

MECHANICS OF MOBILE MACHINES

P.L. MARIEV
Scientific support of production and development of export potential of domestic carrier technique of new generation. pp. 9--11.

Summary: The problems of scientific support of creation of new competitive transport systems for service in super-deep careers are considered. The main directions of a complex of research and development works on their design and production organization are conceptually defined.

Yu.l. NIKOLAEV
New generation of multipurpose vehicles of MZKT. pp. 12--16.

Summary: The prehistory of new generation of multipurpose vehicle's developing is described. The concepts of design are given. Future expansion of vehicle mix and increase in export capacity are expressed.

M.S. VYSOTSKY, V.B. ALGIN
Calculations of kinematics, dynamics and lifetime for multibody systems of mobile machines: the basic directions and future trends. pp. 17--23.

Summary: Techniques and software for calculations of kinematics, dynamics and lifetime for multibody systems of mobile machines are discussed. The basic directions and future trends are examined. The role of original techniques and software in designing competitive machines is marked.

L.A. SOSNOVSKIY, A.V. BOGDANOVICH, O.M. YELOVOY
Local damages and durability of active systems of mobile machines. pp. 24--29.

Summary: Main results of elaboration of model of active systems durability of machines and equipment by the local damage criterion are presented. Methods of local damage interpretation on models in laboratory are given. Main laws of local damage propagation of active systems are delivered.

D.Kh. VALEYEV, V.S. KARABTSEV
Theory of dimensions and tires rolling resistance. pp. 30--32.

Summary: Well-known methods of tires rolling resistance definition are observed and analyzed. The results of elaboration of original methods for calculation of force of tires rolling resistance based on experimental data and various factors (tire material, construction, protector type etc.) using the theory of dimensions are presented. Universal analytic algorithm to perform the linear equation of coefficient of tires rolling resistance with critical velocity is elaborated and experimentally tested.

A.M. SHVETSOV, S.V. NAUMOV, B.N. BELOUSOV, A.A. KUPREYANOV
Individual power trains consisting of all-wheel steering systems. pp. 33--37.

Summary: In the article the urgency of application of all-wheel steering system with flexible geometry at multiaxial vehicles is considered. Problems opposing of introduction this systems are presented. Ways of solving them are suggested.

A.I. YACUBOVICH, V.E. TARASENKO
The base directions of fuel economy at the tractor operation. pp. 38--41.

Summary: The problem of fuel economy at the tractor operation is handled. The base rules of its resolution are formulated. The results of theoretical investigation of influence of components efficiency at specific fuel consumption of tractor with working equipment are drawn.

P.M. HALIAMAU
Determining rotating mass moment inertia of trolleybus traction motors. pp. 42--45.

Summary: A structural view is established and numeric values of parameters were determined of formulae for calculating rotating mass moment inertia of trolleybus traction motors. The formulae is got has very easy and simple kept in mind view (J = M^1.5_чн /10000) and it allows to prognose value of rotating mass moment inertia of trolleybus traction motors at the most early stages of its projecting when only one nominal hour mode torque is known. A methodology and results of experimental determining rotating mass moment inertia of trolleybus traction motors types DK--210A-3, DK--21 IBM and DK--213 which confirm justify of proposed formulae. A simple view in combination with high quality of prognosing (MAPE=3.60%) give a base for putting of formulae is got into engineering practice and into structure of computer program packets destined for quasystatic and dynamic mobile machine transmission analyzing.

N.S. YANKEVICH, N.N. ISHIN, S.E. KAZARINOV, V.M. SHAPPO
The influence of the ignition advance angle on noise characteristics of a motorcycle. pp. 46--48.

Summary: The results of applying of electronic system of ignition advance angle control for gasoline engine are considered in this paper. Suggested approaches allow to decrease the general level of a noise, produced by a road motorcycle 3.1135 «Leader», manufactured by «Motovelo», to 3 dB(A) due to automatic setting of ignition advance angle value in correspondence with working regimes of an engine. Suggested approaches can be used during developing of control systems of wide spectrum of engines.

MECHANICS OF DEFORMED SOLIDS

I.I. ARGATOV
On the movement of a rigid body with a ring support area along a rough plane. pp. 49--52.

Summary: Equations of plane-parallel sliding of a rigid body with the ring support under dry friction are derived. For the time of braking of a nonhomogeneous ring, we obtain a two-sided estimate which coincides with the «unimproved» estimate in the limit case of the narrow ring. As an example, the problem of braking of a system of two nearly situated narrow rings is considered.

G.I. MIKHASEV
Localized forms of parametric vibrations of a cylindrical shell laying on a non-homogeneous elastic foundation. pp. 53--56.

Summary: The problem on the parametric vibrations of a thin, long cylindrical shell lying on an elastic foundation under action of compressive static axial forces and pulsing pressure is considered. Under an assumption that a thickness and physical characteristics of the shell as well as a foundation factor of an elastic basis are functions of a longitudinal coordinate, solutions of the Flugge type equations are constructed in the form of functions decaying far from some parallel on the shell surface.

MECHANICS OF LIQUIDS AND GASES

M.I. ZHYLEVICH, V.S. SHEVCHENKO
Dynamic modeling of inner processes in piston (axial) pump with fluid flow regulation. pp. 57--59.

Summary: The model mathematics for estimation design parameters of piston (axial) pump with servosystem is proposed. The possibility of estimation influence parameters of pump and servosystem on dynamic features oft hydraulic drive.

M.S. ASSAD, V.N. MIRONOF, O.G. PENYAZKOV
Numerical modeling of a flame surface in the closed chamber. pp. 60--65.

Summary: The method for modeling of the flame surface in a closed cylindrical bomb is developed assuming preserving the spherical flame front at interactions with confined walls. Calculations are performed for ignition point located at the side and axial wall. General expressions for flame surface taking into account the changing of flame shape and geometry of the bomb are deduced mathematically. Dependencies of the flame surface on time and flame radius are obtained. These expressions allow studying dynamic of heat release during combustion process.

MECHANICS OF COMPOSITES

V.P. STAVROV, A.L. NARKEVICH
Structure and mechanical properties of chaotic glass fiber reinforced thermoplastics. pp. 66--70.

Summary: On the basis of statistical model of fibers orientation and damages growth the elastic modules and tensile strength of chaotic glass fiber reinforced thermoplastics are calculated.

ENGINEERING COMPONENTS

A.T. SKOIBEDA, A.A. DYUZHEV, A.A. KALINA, I.M. KOMYAK
Prospective directions of designing of dinamic protection systems for drives of harvester working units. pp. 71--73.

Summary: The article deals with basic direction designing of dynamic Protection systems for drives of harvester working units. The object of the work is to reduce dynamic loading of the working unit drive of harvester in terms of simulation and improvement of design and constructive decision.

TECHNOLOGICAL MECHANICS

M.A. BELOTSERKOVSKY, A.M. GOMAN
Selection of the hardening-restoring method for wearing parts depending on service loads. pp. 74--77.

Summary: Science-based decision conception of rational method and modes of regeneration, strengthening and surface protection is proposed. This conception is based on considering of treating dynamic system element reliability. The scientific bases of necessary and sufficient adhesion value of deposition coating determination taking into account the service loads and their modes are developed.

NANOMECHANICS

S.A. CHIZHIK
Experimental nanomechanics. Atomic force microscopy methods. pp. 78--83.

Summary: Considered are atomic force microscopy methods concerning problems of experimental nanomechanics targeted on estimation of physical and mechanical properties of materials in nanovolumes and thin surface layers. Presented arc examples of obtaining and interpretation of the contrast AFM-images that allow mapping of of local mechanical heterogeneity of nanostructured materials.

GEOMECHANICS

M.A. ZHURAVKOV, A.A. KUSHUNIN
Stress state of saturated porous half-space with spherical inclusion. pp. 84--87.

Summary: This paper deals with distribution of stresses in saturated with gas porous half-space about spherical inclusion. The case was examined when elastic characteristics of inclusion are the same with massif characteristics, but pressure inside inclusion is different from pressure in massif. Some results of numerical computation were given.

INNOVATION MANAGEMENT

I.P. TIKHONOV, E.Y. KHRUSTALEV
The new ways of fundamental investigation results promotion (The experience of Russian Fond of Fundamental Investigation). pp. 88--92.

Summary: The models of partnering and coordination of Russian fond of fundamental investigation (RFFI) for supporting and commercialization of fundamental scientific researches are proposed. The aims and criteria of project competition supporting taking into account of scientific priorities are considered. The results of applications analysis and expert examination of final reports on projects of oriented fundamental researches contest completed in 2007 year are describe.

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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last update February 12, 2008
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2008 The National Academy of Sciences of Belarus
Copyright © 2008 Mechanics of Machines, Mechanisms and Materials