**№****4(21), 2005**

**SUMMARIES**

Numerical simulation for the gear diagnostics using joint time-frequency Wigner-Ville
Distribution. **T.B.
Geramitcioski, L.R. Trajcevski.** “Problems of Mechanics”. Tbilisi, 2005,
№ 4(21), pp. 9-16, (Engl.).

This work paper
used date from a numerical simulation to develop and evaluate the fault
classification algorithm. The fact that the Wigner-Ville Distribution (WVD) can
represent the energy of a gear vibration signal was used for the gear
diagnostics. A novel method for gear damage detection using a new gear fault
detection parameter based on the WVD and is called NP4 detection parameter.
This parameter is calculated from a time-domain power signal derived from the
WVD. The novelty of the NP4 parameter is in the application of the previously defined statistical parameter
called kurtosis and its interpretation for gear fault detection. The
sensitivity of this gear fault detection parameter to the gear damage is
demonstrated on the numerical simulation example. Also, in this paper is developed software in Matlab for solved the Wigner-Ville Distribution and
NP4 detection parameter. 4 ill. Bibl. 6. Engl., summ. in Russ.

The no_{x }emission
calculation for marine diesel engine using operation parameters. **T****. ****Borkowski****. **“Problems of Mechanics”. Tbilisi, 2005, № 4(21),

pp. 17-24, (Engl.).

Continued
environment legislative trend generates a desire for marine engine real time
exhaust emission data, with a view to their use in a feedback control strategy
in conjunction with other reduction techniques. An experimental study is
conducted to investigate the use of phenomenological multi-zone models to
predict NO_{x} emission, based on marine diesel engine operation
parameters. 5 ill. Bibl. 7. Engl., summ. in Russ.

The cylinder pressure analysis of marine diesel engine.
**P. Kowalak.** “Problems of Mechanics”.
Tbilisi, 2005, № 4(21), pp. 25-31, (Engl.).

Some pressure transducers
cause difficulties with determination of the absolute cylinder pressure value.
A base pressure has to be defined in the scaling algorithm. To determinate the
characteristic difference two sets of the cylinder pressure samples, during
scavenging process collected, and statistical analysis conducted. The results
shows advantage some scavenging periods and more valuable for scaling. 2 ill.
Bibl. 3. Engl.; summ. in Russ.

THE
PROPOSAL OF OIL-FIRED BOILER TEST. **J.
Myśków.** “Problems of Mechanics”. Tbilisi, 2005, № 4(21), pp. 32-36,
(Engl.).

The paper shows
the proposal of oil-fired boiler test according to the existing rules-energetic
parameters (mainly – maximum load capacity of boiler) and the toxic compounds
in the exhaust gases. The test should be carried out during sea trials. 5 ill.
Bibl 2. Engl., summ. in Russ.

On the problem of intellectualization of railway
sensors.

**K. Kutateladze, N. Davitashvili, C. Barkan,
N. Mgebrishvili, T. Nadiradze, O. Chudakova,
M. Tatanashvili.** “Problems of Mechanics”. Tbilisi, 2005, № 4(21), pp.
37-44, (Engl.).

Comparative
analysis of railway sensors used in the systems of signalization,
centralization and block systems of the railway transport, is carried out. On
the basis of intellectualization of railway sensors, for the purpose of
elimination of their shortcomings, a new multifunctional system, ensuring
railway traffic safety, is offered and analyzed. With the use of intellectual
sensors, a device ensuring counting of rolling stock’s axles and units,
determining of the speed of movement and degree of wheel pairs’ wear with great
precision and identifying of the moving units, is elaborated. 3 ill. Bibl. 10.
Engl.; summ. in Russ.

Determination of contact line of mated surfaces of
space transmittion in gears. **R. Gogaladze, S. Barbakadze, M. Bibiluri, L. Gogoladze****.** “Problems of Mechanics”. Tbilisi,
2005, № 4(21), pp. 45-48, (Russ.).

There are
elaborated special methods of determination of surrounded cogged surfaces. Contact
line of cogged surfaces and touch surface are defined. A goal of researches is
conducting of examination of space cogged transmittion according to touching
trensformations and their following practical realization. 2 ill. Bibl. 5.
Russ.

Methods of catalysis coating of fuel injection
elements of diesel engines.** O. Klyus. “**Problems of Mechanics”. Tbilisi, 2005, № 4(21),
pp. 49-53, (Russ.).

The рaper
presents methods of ion implantation, anti wear and electric-spark ignition in
catalysis coating on parts of fuel
injection elements of diesel engines. 4 ill. Bibl. 2. Russ.

OPTIMIZATION
OF PRECISION TOOLS FOR ASSEMBLING ELECTRICAL SCHEMES. **M. Amiridze****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 54-58, (Russ.).

The work deals
with optimization of geometric parameters of micro welding tools discussing the
tools, materials and working parts used in designing an integral micro system.
It considers the urgency of the issue, the goal of the work and main objectives
as well as the ways to achieve it. The paper contains the key conclusions
derived from the research. The result of this work are based on the experiments
and the theoretical research carried out by the author. 3 ill. Bibl. 6. Russ.

AUTOMATED PROJECTION OF PIECESE BODY’S MILLING
MANUFACTURING ON MACHINE CENTRES. **T. Gegechkori, L. Tediashvili.** “Problems
of Mechanics”. Tbilisi, 2005,

№ 4(21), pp. 59-62, (Engl.).

The
structural scheme of the automatized projection system of body pieces’s
manufacturing process on machine centres and the means of her realization are
given. 3 ill. Bibl. 4 Russ.

To the question of determination of basic power
parameters for cutting process on a special planer.
**O. Rukhadze, M. Shvangiradze.**
“Problems of Mechanics”. Tbilisi, 2005, № 4(21), pp. 63-68, (Russ.).

In
this paper, the brief survey of power parameters in the process of cutting on a
special planer by means of a wide tool at the trimming of ingots both in
continuous metallurgical cycle, i.e. in hot state, and in cold state, in given.
The question of creating of a new type cutting tool is studied, which is
designed and produced in the laboratory of the Department of engineering tools
of Georgian Technical University. 4 ill. Bibl. 3. Russ.

FOR
THE ISSUE OF TREATMENT THE FLAT SURFACES BY ROLLED DISKS. **T. Gerkeuli, Z.
Gerkeuli. **“Problems of Mechanics”. Tbilisi, 2005, № 4(21), pp. 69-72,
(Russ.).

In this article
there is discussed the issue about possibility and expediency of treatment the
flat surfaces by rolled disks in lightened condition. There is showed principal
scheme of treatment. Directions of powers acting in deformation hearth are
defined by carried out analysis. Calculation formula of supplying power during
treatment is made. 2 ill. Bibl. 2. Russ.

The Theory of the moving wheels considering enological
Characteristics of the soil. **R.
Makharoblidze, I. Lagvilava, J.**** ****Dzirkvadze****. **“Problems of Mechanics”. Tbilisi, 2005, № 4(21),
pp. 73-78, (Russ.).

The
calculating formulas of the size of the wheels and forces of resistance are
been gotten for the using of combing classical theory of moving wheels and
enological methods. The estimation is drawn about influence of permanent
relaxation of the soil and speed of taking wheels of these indicators. 1 ill.
Bibl. 5. Russ.

Water steam as plasma forming environment. **Z. Sabashvili,
D. Tavkhelidze, Z. Mchedlishvili**

The offered
article is devoted to the problem of examination of physical and chemical
processes arising in plasmatrons during usage of water steam as plasma forming
gas. Here, based on the original scheme of plasmatron, water is submitted
directly in to the field of an arch. The specified scheme can be successfully
used as thermo-generators of different purpose. 4 ill. Bibl. 4. Russ.

About a
numerical solution of the modified problem of Dirichlet, for a case of the
broken contours.** M. Kublashvili, Z. Kapanadze. **“Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 83-87, (Russ.).

The
modified problem of Dirichlet, for a case of the broken Liapunov’s contours
which solution is reduced to a solution of a singular integral equation of the
first sort is investigated. Circuits of a high degree of an exactitude of a
numerical solution of a task in view are developed. In paper the realized
numerical experiments are reduced also. Bibl. 5. Russ.

Exact-solution of the problem of nonstationary
convective heat transfer in a flat
channel. **V.
Tsutskiridze.** “Problems of Mechanics”. Tbilisi, 2005,

№ 4(21), pp. 88-91, (Russ.).

Investigation has
been made of the nonstationary convective heat transfer problem for laminar
steady-state viscous incompressible fluid flow in a flat channel. In the case
of a parabolic – type velocity profile an exact solution of the problem of
found in form of the Fourier – integral expansion in an actial coordinate and
series expansion by degenerate hypergeometric functions. Bibl. 9. Russ.

MATHEMATICAL MODELLING OF MUD
EARTH FLOWS. **A. P****h****rangishvili,
T. Obgadze, Z. Tcveraidze, I. Mathiashvili.
**“Problems of Mechanics”. Tbilisi, 2005, № 4(21),

pp. 92-94, (Russ.).

In work
on the basis of a method of averaging Voinich-Sianojentski the mathematical model of a mud earth
flow, as biphasic continuous environment of the second order is under
construction. Adequacy of the constructed mathematical model is checked on
experimental data Begnold, Savage, Tevzadze and
Xerxeulidze. In work results of comparisons of theoretical calculations with
experimental data are resulted. Bibl. 10. Russ.

MATHEMATICAL
MODELLING OF AVALANCHE STREAMS AND CALCULATION OF DEFINING PARAMETERS WITHIN
THE LIMITS OF RETURN VARIATIONAL STATEMENT KUPRADZE-BREBBIA. **A. Phrangishvili, T. Obgadze, Z. T****с****veraidze, I. Matiashvili. **“Problems of Mechanics”.
Tbilisi, 2005, № 4(21), pp. 95-100, (Russ.).

In work
on the basis of a method of averaging Voinich-Sianojentski. The mathematical model of a biphasic
liquid describing current of avalanche streams is under construction. On the
basis of return variation statement Kupradze-Brebbia and with use of method RO
- functions Obgadze-Gabrichidze, the algorithm of calculation of problems,
flows of bodies of the complex geometrical form a biphasic stream of a liquid is
under construction. Bibl. 12.
Russ.

On the numerical solution of dirichlet problem in the
case of unknown open boundary curve. **Z. Kapanadze, O Kvachadze,
T. Chankotadze, M. Kublashvili. **“Problems of Mechanics”. Tbilisi,
2005, № 4(21), pp. 101-105, (Russ.).

In this paper we
considered the solution of dirichlet problem when the equation of integration
curve is unknown and it is given only by group/ The algorithm of high order
exactness for numerical solution is suggested. The corresponding numerical
experiments are given. 1 ill. Bibl. 6. Russ.

Nonsteady teat exchange during laminar liqud flow in a
rouns pipe conscdering friction heat. **V. Tsutskiridze****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 106-109, (Russ.).

Friction heat been
studied for its effect on nonsteady heat exchange during laminar liquid flow in
a round pipe. 2 ill. Bibl. 8. Russ.

Selection of the
parameters of aerodynamic suspension devices.

**R. Zukakishvili****. **“Problems of Mechanics”. Tbilisi, 2005, № 4(21),
pp. 110-114, (Russ.).

In this paper, the possibility of decreasing
the moment of friction in supports of suspension devices at use of bearings
with autocompensation is examined. 4 ill. Bibl. 4. Russ.

A NEW DIRECTION IN THE VIBROPNEUMATIC TECHNIC. **G. Eradze, M.
Jikia****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 115-118, (Russ.).

In
article it is considered problems of the wrong scientific approach to a
question of reduction of a vibrating background of manual pneumotools. In the
proof to this the pre-production model of the manual pneumoshock tool twice
reducing vibration a background is made and tested. For founders new generation
of a design pneumatic instrument is offered to take into account scientific
experience of authors. 1 ill. Bibl. 4. Russ.

CREEPING DEVELOPMENT
EMPIRICAL LAWS IN POLYMERIC FIBROUS COMPOSITE MATERIALS. **A. Dumbadze, J. Kanchaveli****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 119-125, (Russ.).

The most reliability of exponential empirical
dependence as compared with power dependence is proved to describe complete
full stretch deformation for considered polymeric fibrous composite materials
P.F.C.M. in elastic stress and low temperatures Т=20ºC conditions. Relative errors reduction ways are
offered. The result of researches allows to determine, precisely enough, laws
of development of residual deformations and movings in working designs, and
also to use them in calculations. Bibl. 6. Russ.

DIAGNOSTICS OF PARAMETERS OF THE CARS RATED SCHEMES
AT STEPPED DISTURBANCES. **B. Bandzeladze, V.
Tsitadze****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 126-131, (Russ.).

Diagnostics of
parameters are shown on the model of the car’s hanger bracket. It is
determined, that the method of Laplace transformation permits to use broad
spectrum of piece-linear functions as external disturbances. These functions
are given in suitable tables which represent operational calculations. 1 ill.
Bibl. 3. Russ.

NEW CONSTUCTIVE SCHEMAS OF TEMPORARY ERACTABLE
BRIDGES, QUICKLY DEPLOYABLE IN EXTREME CONDITIONS. **E. Medzmariashvili, N. Tsignadze,
G. Bedukhadze**

Structural schemes
of rapidly deployable eractable bridges with various types of underway basis and span constructions were
worked up-to-date engineering solution. The design drawings of eractable metal
bridge’s set with falcate moduls - KM
-01T were created. It’s modular elements for short bridge crossing were made in
manufacture conditions, and factory tested on the proving ground and in field environment. With consideration of
accumulated expirience and outcomes of conducted tests the bridge’s set KM -02T was worked up and produced
and successfully tested in natural conditions. 6 ill. Bibl. 2. Russ.

Method of compulsion of crushing apron and fibrous-optical
light-leader on surface of construction for definition of tensely-deformed
state. **M. Manjavidze, A. Natroshvili, T.
Nareklishvili****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 137-141, (Russ.).

It is work out the
method of the compulsion of a crushing apron and construction of the
fibrous-optical light-leader. It is formed the model for the analysis of the
tensely-formed state. 3 ill. Bibl. 2. Russ.

ANALYSIS
OF CIRCULAR LINING WITH CONSIDERATION OF ELASTIC AND RHEOLOGICAL EFFECTS OF
ROCK MASS AND STRUCTURE TECHNOLOGIES.

**G.**** ****Datukishvili,
Z.**** ****Kviriashvili****.** “Problems
of Mechanics”. Tbilisi, 2005, № 4(21), pp. 142-147, (Russ.).

The methods of analysis of cast in-situ concrete
lining of circular outline is developed considering the technology of tunnel
construction and rock creep by substitution of integral time operators with the
apparatus of approximated time functions. 1 ill. Bibl. 8. Russ.