SUMMARIES

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Dynamic
analysis for the hinge-lever system with elastic links and centred masses used
for the braking of a wagon with shoe’s unilateral press.
**N. Davitashvili, A.
Chkhaidze.** “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 11-23,
(rus.).**

**
Dynamic analysis for the hinge-lever
system with elastic links and centred massed for the braking of a wagon with
shoe’s unilateral press has been given. To provide long-term and reliable work
of the system, nonlinear differential equations, expressing real rules for a
motion of drive, mechanism and centred masses (studying oscillatory occurrences
of masses) for executive plane four-link system and centred in three points of a
connecting rod, have been obtained. 4 ill. Bibl.5. Russ.**

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On dynamic synthesis of
electric locomotive traction drive system. **
G. Ghkhaidze, A. Chkhaidze, T. Mchedlishvili.** “Problems of
applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 24-29, (rus.).**

**
In accordance with the known method of the synthesis of
multiconnection drive systems by the given transient processes the structural
schemes of “separated” and “independent” systems have been plotted. Mathematical
models of the dynamics of these systems in transient modes of electric
locomotive motion are worked out. Analytical expressions of the wanted processes
are obtained and a general scheme of the sequence of mathematical procedures of
the synthesis of the considered multiconnection systems is formulated. 2 ill.
Bibl.9. Russ.**

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Towards the calculation of
resilient-frictional vibration units of mechanisms.
**V. Gogilashvili, B. Ninoshvili.** “Problems of
applied Mechanics”. Tbilisi, 2001, ¹3(4), p.30-33, (rus.).**

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Real mechanisms in the form of reduced resilient-frictional
vibration units are considered. Methodology is given for the calculation of
energy scattering and vibration amplitude for the systems with small
non-linearity. 2 ill. Bibl.4. Russ.**

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Rack system for steering the
vehicle.** R. Varsimashvili. **“Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 34-37, (rus.).**

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Rack transmission system with multi-twig round and oval gears
is used to achieve the steering of the vehicle. Thorough analysis of the
transmission is provided as well as pinion cutting methods discussed. 5 ill.
Bibl.6. Russ.**

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Formalisation of dynamic
model and classification of supplementary motions for real crank-slide mechanism
with clearances. **G.
Sharashenidze, S. Sharashenidze. **“Problems of applied Mechanics”. Tbilisi,
2001, ¹3(4), p. 38-43, (rus.).**

**
In this paper, by taking into account existed physical
occurrences in the kinematic pairs with clearances, the formalisation for
dynamic model of the crank-slide mechanism of the diesel of refrigerator wagon
has been given. The classification for supplementary motions of the given
mechanism with three clearances has been carried out. The initial conditions for
the conversion from one type of supplementary motion to another have been
determined. The proper mathematical method has been worked out. 1 ill. Bibl.5.
Russ.**

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The kinematik research the
joint-lever mechanism, drawing the projections of the curves of intersection of
the solids’ surfaces.
**G. Naruslishvili.

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It is carry out, the scientific research of kinematics of
joint-lever mechanisms, maying draw the projections of the curves of
intersection of the solids’ surfaces, in particular, of two cylinders (three
variants), of prism and cylinder, of two cones, of cylinder and cone. 6 ill.
Bibl.5. Russ.**

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Optimal version of
production of shaped parts from wood materials.** N.
Natbiladze.** “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 51-53,
(engl.).**

**
The article reviews the methods of production of shaped parts
by means of copying-milling machines, shaping cutter and program operation
machines (woodworkers). The article defines the character of technological
production price and offers respective drafts, which promote to determination of
optimal methods, according to number of parts. 2 ill. Bibl.1. Engl.; summ. rus.**

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On theory of sawing plants.**
R. Makharoblidze, Z. Makaroblidze,

I. Dzirkvadze.** “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.
54-57, (rus.).**

**
The way of producing shavings at sawing plants permits to
apply the methods of theory of stroke for describing dynamic processes.
Estimated formula of the stroke effort of cutting at sawing is deduced. The
examples are offered. 1 ill. Bibl.3. Russ.**

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Analysis of kinetic energy
of a crank-slide mechanism with clearances.** G.
Sharashenidze, S. Sharashenidze, A. Sharvashidze.** “Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 58-64, (rus.).**

**
In this paper, the mathematical method for obtaining and
investigation of variable kinetic energy of the crank-slide mechanism with
clearances in three kinematic pairs of diesel engine has been given.
Mathematically formulated expressions of kinetic energy necessary for dynamic
investigation of supplementary motion of the mechanism and with taking into
account linear and polar, generalized supplementary co-ordinates in the pairs
with clearances have been obtained. 1 ill. Bibl.4. Russ. **

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Technological defects of
sewing-machines caused by hinged mechanisms, the ways of their elimination and
the resistance properties of textile materials.
**N. Davitashvili, N. Phakadze.** “Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 65-72, (rus.).**

**
In this paper, the description of all technological defects
of sewing-machines caused by hinged mechanisms has been given. The ways of their
elimination and the resistance properties of textile materials have been
considered. 7 ill. Bibl.9. Russ.**

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Derivation of Weinstein
function and its connection with Kron transformations.
**A. Milnikov.** “Problems of applied Mechanics”.
Tbilisi, 2001, ¹3(4), p. 73-75, (rus.).**

It is shown, that it is possible to receive the Weinstein function, playing important role in theory of large and complex oscillation systems, as a result of process of imposing of constraints on a base oscillation system, that has allowed to define its connection with Kron tensor transformations. Bibl.5. Russ.

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Experimental device for
determination of quality of surface layer of samples based on the exoelectron
emission.** Z. Seskuria.** “Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 76-80, (rus.).**

**
In the present essay are given the principle of operation of
experimental equipment for determination of quality of surface layer of samples
based on exoelectron emission, description of procedures executed during testing
of said equipment through measuring of residual stress. The equipment has proved
to have large dynamic range, high rate of magnification of 108-109,
and 100% efficiency of detection. 5 ill. Bibl.3. Russ.**

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Definition of the critical
dependence between tensing forces of the radial sheets and ropes in the
deployable two-layer reflector.** Sh. Tserodze.**
“Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 81-83, (rus.).**

**
In the given article there are determined the parameters of
the best fit parabolic of the offset surface using the method of least squares.
The solution of the given problem enables us to correct the focus of reflector.
Besides it, it is parabolic, modified from the nominal parabolic in order to
minimize the quadratic average deviation of the real surface of reflector from
the possible best fit to a parabolic shape. The new parameters are found in such
a manner that the sum of squares for the deviations of observed points Zi from
the approximizing function f(Xi,Yi)
has its minimum value. The defined function has the shape of parabolic with its
focal length and peak. Bibl.6. Russ.**

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Cutting properties of
oxide-carbide ceramic materials containing synthetic titanium carbide.
**V. Tsotskhadze, G. Khvichia,

G. Gotiashvili, K. Gvazava. **“Problems of applied Mechanics”. Tbilisi, 2001,
¹3(4), p. 84-86 , (rus.).**

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Cutting properties of carbide-ceramic materials produced by
the autors by cold pressing of powders were studied. Ceramic materials are
composed of: 20% TiC which has been obtained by synthesis from titanium chips
and 80% of aluminium oxide Al2O3.
2 ill. Bibl.4. Russ.**

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CAD of milling cutter.
**A. Mgaloblishvili. **“Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 87-89, (rus.).**

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In presented work are done results of creation CAD of milling
cutter. Using this method is raising efficiency of engineering work and quality
of projecting. 2 ill. Bibl.2. Russ.**

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Computer aided design of
round stretcher.** A. Mgaloblishvili.** “Problems
of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.90-93, (rus.).**

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In work happen to results of creation a CAD of round
stretcher, real raising efficiency of engineering work and accuracy of data. 2
ill. Bibl.2. Russ.**

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The structural theory of
scaled effects of durability.**

G. Gvinepadze. **“Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.
94-95, (rus.).**

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The article deals with the qualitative structural theory of
scaled effects of durability with taking into account the range of factors.
Bibl.5. Russ.**

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Special cases of the
structural formula of durability and its solution on computer.
**E. Machaidze. **“Problems of applied Mechanics”.
Tbilisi, 2001, ¹3(4), p. 96-97, (rus.).**

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Three cases of prediction of durability on stretching of a
composite material when filling remains whole are considered. 1 ill. Russ.**

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Application of the theory of
random functions to a rating of durability of concrete.
**M. Pashiashvili. **“Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 98-100, (rus.).**

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It is considered denseness characteristics for the concrete
of ferro-concrete column on random functions of its sections. It is obtained the
values of normed correlation functions. 2 ill. Bibl.4. Russ.**

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Concentration of the strains
in the structural elements caused by the static factors.
**V. Kharshiladze. **“Problems of applied
Mechanics”. Tbilisi, 2001, ¹3(4), p. 101-102 , (rus.).**

**Brief consideration of the problems
on concentration of the strains in the structural elements caused by the station
factors has been given. Bibl.9. Russ.**