**#**** 4(33) 2008**

**SUMMARIES**

RESEARCH OF SPHERICAL FIVE-BAR
RRRRT TIPE MECHANISM WITH OUTPUT LINK DWELLS. **N. Davitashvili.** “Problems of Mechanics”.

In work is given the research of the spherical five-bar linkage mechanism
with two degrees of freedom with four in turning pairs and with one
sliding pair (RRRRT). The same mechanism
is considered as spherical five-bar mechanism with one degree of freedom, the
input link continuous motion if that is transformed in the discontinuous motion of the output link – the
slider. It is revealed, that for one motion cycle of a crank the spherical five-bar mechanism has two long
dwells of the output link. 3 ill. Bibl. 17. Engl.; sum. in Russ.

DEFINITION OF CRITICAL LOADING ON
THREE-LAYER PLATE ON BASIS OF SOLUTION OF ACCORDINGLY STATICAL TASK. **G. Kipiani.** “Problems of Mechanics”.

On the basis of the thin plates theory and
with application of elements of the general functions theory the task of
definition of critical loading in the three-layer plate on the basis of the
solution of the corresponding static problem is solved. 1 ill. Bibl. 11. Engl.; sum. in Russ.

THREE-DIMENSIONAL TASKS OF
TERMOELASTICITY AND HEAT CONDUCTIVITIES FOR PIECEWISE HOMOGENEOUS BODIES WITH
THIN INCLUSIONS. **A. Bukhsianidze.** “Problems
of Mechanics”.

The effective analytical solution of some termoelasticity and
termoelasticity -plastic tasks for rigid high heat conductive thin layers of
the foreign impurity in matrix is received by the method of boundary layer. 1
ill. Bibl. 8. Engl.; sum. in Russ.

Optimization
of automatic system’s parameters of damping of humus raw matherials. **A.
Aghasaryan.** “Problems of
Mechanics”.

The article deals with the theoretical research descriptions and results
of newly developed semiautomatic damping system for humus mass in optimum conditions (75-80 %) with direct way of control.
On the basis of the researches, the constructive and exploitation parameters of
the system have been defied. The design and operational parameters of the given
system are defined. Results of theoretical researches give the possibility to
calculate and select the pipeline parameters with a constant exit of water. 2
ill. Bibl. 5. Engl.; sum. in Russ.

MAINTENANCE OF PRINCIPLE INDICES OF
THE TURBO-SUPERCHARGED DIESEL OPERATION UNDER HIGH ALTITUDE CONDITIONS. **B. Kordzadze, T. Natriashvili, R.
Demetrashvili. **“Problems of Mechanics”.

On the basis of mathematical
relations of turbo-supercharged diesel power with altitude and thermal exchange
processes in the inlet tract of the same diesel with the supercharged air
cooler, are established practically important thermo-dynamical features of
joint operation of the supercharged air cooler and the turbo-supercharged
diesel engine under high altitude conditions according to condition of
providing with the constant power irrespective of atmospheric conditions. 4
ill. Bibl. 2. Engl.; sum. in Russ.

MODELING OF MECHANICAL STRESSES IN
THE SOLIDS WITH USING OF ELECTRICAL CONDUCTING POLIMER COMPOSITES. **J. Aneli, M. Bolotashvili.** “Problems of
Mechanics”.

The method of modeling of the static
mechanical stresses in the solids and constructions at their deformations by
using of electrical conducting polymer composites has been proposed. The method
is based on the functional dependence of the specific volumetric electrical
resistance of the model materials on the value of deformation. The measures of
the local resistances in the solids with definite geometry allow to define the
mechanical stresses depending on the coordinates of the elementary volume in
the solid. The numerical data of the
local stresses as function of the electrical resistance of separate elementary
cubs and coordinates of ones in the
model polymeric material have been obtained. The proposed method may be used
for investigation of local stresses in solids also in dynamical regime. 2 ill.
Bibl. 6. Engl.; sum. in Russ.

METHOD OF DETERMINATION OF
ANALYTICAL FORM OF ONE- AND TWO RANK FUNCTIONS OF TWO VARIABLE, GIVEN BY THE
TABLE. **I****. Gorjoladze, N.
Gorjoladze.** “Problems of Mechanics”.

Particular cases of mathematical
model of two variable function given by one- or two rank functions considered
in this article. Their checking criteria and formulas of determination of
analytical form of respective functions are formulated. Bibl. 3. Engl.; sum. in
Russ.

CONCRETE
CONSTRUCTIONS MONITORING WITH FIBER OPTICAL
SENSORS. **M. Tsikarishvili, T. Nareklishvili, L. Zambakhidze, L.
Kakashvili, D. Kupatadze.** “Problems of Mechanics”.

Fiber-optical
methods of concrete construction control elaborated by us are tested
theoretically and experimentally. The proposed methods enable to control
realization during manufacturing, during
building special purpose constructions and during the whole period of
exploitation. 3 ill. Bibl. 8. Engl.; sum. in Russ.

A MATHEMETICAL MODEL FOR
CALCULATION OF THE OPERATION PROCESS IN THE AUTOMOBILE ENGINE WITH FORCED
ROTATION. **B. Kordzadze, R. Demetrashvili.**
“Problems of Mechanics”.

The results of theoretical research of the
operating process of the automobile internal combustion engine with outlet
brake having forced power, in which due to elimination of self-opening of outlet valves outlet
pressure increases sharply, are given in the paper. At that, the method
elaborated by N. Glagolev and A. Simson is used, which describes gas-dynamical
phenomena as a common combination of the interdependent processes occurring
simultaneously in the cylinders and outlet receiver. 1 ill. Bibl. 4. Engl.;
sum. in Russ.

CHECKING CRITERIA OF MATHEMATICAL
MODEL FOR SUM OF ONE VARIABLE FUNCTIONS OF
ARGUMENTS OF MULTIVARIABLE FUNCTION. **I.
Gorjoladze, N. Gorjoladze.** “Problems of Mechanics”.

The checking criteria of
mathematical model for sum of one variable functions of arguments of a
multivariable function, which ensure the existence of analytical form
corresponded to the model, is received. Bibl. 4. Engl., sum. in Russ.

THE FUNDAMENTALS OF INVESTIGATION
AND DEVELOPMENT OF METHODOLOGY AND DEVICES FOR THE LEATHER GOODS MATERIALS’
MECHANICAL PROPERTIES CONTROL. **T.
Uriadmkopeli, T. Maglakelidze, L. Demetradze, N. Kirkitadze.** “Problems of
Mechanics”.

In a given work there are considered the problems of
analysis and evaluation of leather materials behavior during their deformation,
which they undergo with stretching, compression, bending, mechanical and
physical influence etc. There is shown that the material’s deformation depends
on the made effort, the time of its action and the time, which passed from the
moment of relief of the force. In a work there is
proposed the methods of analysis of materials’ properties with their different
deformations, which are changing their dimensions and shapes. There are
presented the practical examples of special devices with the description of
their operating principles with the aim of evaluation and definition of their
and even of finished goods’ (articles) operating properties finally – the shape
stability, wearing quality, endurance, durability and others, with
consideration of the field conditions. 3
ill. Bibl. 3. Engl.; sum. in Russ.

OPTIMIZATION OF FUEL CONSUMPTION BY
CITY AUTOBUSES AND ITS FORMATION ANALYSIS. **V****.I. Jajanidze, J.G. Khmiadashvili, V.D. Jajanidze, J.T. Goglidze.** “Problems
of Mechanics”.

Careful consumption of fuel is one
of the actual problems of increase of efficiency of city autobuses, which
solution is possible by means of elaboration of fuel consumption norms. For
this purposes regularities of formation of route fuel consumption were studied
and on their basis methods of fuel economy are elaborated. Bibl. 3. Engl.; sum.
in Russ.

SELECTION
OF ENGINES AND MAIN GEAR FOR BUSES OPERATING IN LOCATED ON MOUNTAIN RELIEF
CITIES. **D. Pridonashvili****.** “Problems of Mechanics”.

In work is developed the technique of rational selection of the engine
and main gear transmission ratios characteristic by taking into account the
operation conditions. 2 ill. Bibl. 3. Engl.; sum. in Russ.

CAUSED BY DUST OCCUPATIONAL
DISEASES AND THEIR PREVENTION. **N.
Machavariani, S. Metonidze, K. Akhmeteli.** “Problems of Mechanics”.

In work are presented the occupational diseases and particularly caused
by dust occupational diseases as pneumoconiosis and caused by them pathologies.
Also are given the activities and recommendations oft extermination of these
diseases. Bibl. 3. Engl.; sum. in Russ.