**¹3(36)2009**

**SUMMARIES**

IFToMM
Celebration for 40-th year celebration. An outline and perspective of IFToMM.** Marco Ceccarelli. **“Problems of Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 5-12. (Engl.).

research
of seven-BAR joint mechanisms with two
degrees of freedom.** ****N. Davitashvili. **“Problems of
Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 13-23. (Engl.).

Is given the analysis of
seven-bar spatial, spherical and planar joint
mechanisms with two degrees of freedom. Are
shown the various structural schemes of joint mechanisms, which are
created by attaching of two-arm and three-arm groups for initial mechanism. On examples
of spherical and planar seven-bar joint mechanisms with two degrees of
freedom by analytical method is solved the task of kinematics. Positions, velocities
and accelerations of input links and their points of mechanisms are defined in
the function of generalized coordinates .The carried out researches gives
possibility to investigate the dynamics and elastic theory of researched
mechanisms. 5 ill. Bibl. 18. Engl.; sum. in Russ.

Investigation of influence of tangential resistance
of the system mandrel-rod of the broaching mill on kinematics of broaching
process of workpieces. **R. Adamia, S. Mebonia, T. Natriashvili.** “Problems of
Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 24-29. (Engl.).

On
the basis of analysis of kinematics of deformation zone of the broaching mill
of transversal-screw milling, dependence
of the neutral section position and
correlation of areas of metal sliding along the rollers upon the moment
of tangential resistance of the system mandrel-rod of the broaching mill, is ascertained. 4 ill. Bibl.6. Engl.; sum. in
Russ.

Static and Dynamic Calculation and
Modeling of Orbital Cable Systems of Dumbbell Type. **D.
Pataraia. **“Problems of Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 30-38. (Engl.).

The article to consider the calculation of cable systems -
dumbbell system in space. For the mentioned systems are set two tasks:
Definition of the system configuration and acting loads during the stationary
flight and Modeling of the process of deployment of the system. 12 ill. Bibl.
8. Engl.; sum. in Russ.

Simulation of Drivelines Control System.** ****C.
Aksu. **“Problems of Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 39-43.
(Engl.).

The work concerns the important problem of Drivelines
terminal control problem. In previous works we published new theoretical
results on the synthesis of various terminal control problems algorithms. On
the purpose of exploration of Driveline’ new Control methods a corresponding
simulation model was designed. To realize the model special MATLAB software
(Simulink) was used. Results of simulation proved the adequacy of the
elaborated control method. 4 ill. Bibl. 7. Engl.; sum. in Russ.

AVERAGED
ON SPACE ENERGY OF TURBULENT STREAMS AND
ENTROPY. **A. Aptsiauri. **“Problems of
Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 44-51. (Engl.).

In article, by application
of methods of local spatial averaging, in conditions of local thermodynamic
balance, the vector of energy of
averaged turbulent stream is offered. Connection of a total stream with a
stream of energy of turbulent pulsations is established. It is shown, that the
intensification of turbulence in a direction of turbulent diffusion results in
occurrence of a return stream of thermal energy that is the reason of entropy
decrease. Hence, on the basis of fundamental laws of preservation is proved, that in a stream, at absence of
external thermal influence (without cooling) on a site of generation of
turbulence, during origin of the ordered structures, it can be observed
reduction of entropy, that contradicts the established representations
about entropy and second law of
thermodynamics. 4 ill. Bibl. 5. Engl.; sum. in Russ.

ABOUT DEPENDENCIES DAMPING FROM ELECTRIC
FEATURES OF THE VIBRATORY MACHINE. **M. Tedoshvili, H. Tsulaia, M. Chelidze. **“Problems of Mechanics”.
Tbilisi, 2009, ¹ 3(36), pp. 52-56. (Engl.).

In the article the questions of the forming of damping of
resonance electric vibration machines are considered. It is determined that not a few role plays on the process of power supply
of the machine such electric features as they are: the power supply the machine, constant
forming tractive power and sedate saturation electric magnet as well as
technological load. 5 ill. Bibl. 5. Engl.; sum. in Russ.

Development of cutting
force model at face milling taking into account instability factors. **M. Iremadze. **“Problems of
Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 57-60. (Engl.).

In
the work by results of the carried out calculations is established, that instability of dynamic influence on
workpiece blank equally depends both from nonstationarity of material removal
process, and on instability of physical-mechanical properties of workpiece
blank and of tool teeths runout. And the instability factor ratio caused by
nonstationarity of material
removal process at face milling, increases with increase in machined feed
and depth. Bibl. 8. Engl.; sum.
in Russ.

MECHANICAL RELAXATION AND ELECTRIC CONDUCTIVITY OF
ELECTRICAL CONDUCTING POLYMER
COMPOSITES. **J. Aneli, G.
Basilaia, L. Shamanauri. **“Problems of Mechanics”. Tbilisi, 2009, ¹ 3(36), pp. 61-67. (Engl.).

Effect
of mechanical relaxations on the relaxation phenomena of electrical conducting
polymer composites (ECPC) have been investigated. It is experimentally shown
that filler content significantly affects relaxation characteristics of the material.
The main reason of these differences is the effect of the filler type on
proceeding of relaxational processes. Rubbers with active carbon blacks display the ranges of slow and fast
relaxations much more clearly, than those with low active carbon blacks even at
increased concentrations in increase of the rubber elasticity modulus with the
increase of the filler concentration. The effect of the filler type is
displayed by formation of an inter-phase layer and is similar to the effect of
the filler content. In the case of active carbon blacks, the increase of the
filler-filler and polymer-filler interactions is balanced by high content of
low active carbon blacks, because in both cases the modulus of the material and
internal friction in relaxation processes grow. 3 ill. Bibl. 13. Engl.; sum.
in Russ.

Analysis
of multi-layered panels with discrete ribbed filler. **G. Kipiani, I. Kacharava, Z.
Sopromadze. **“Problems of Mechanics”. Tbilisi, 2009,

¹ 3(36), pp. 68-70. (Engl.).

Are developed the new
variants of analytical method of
multilayered panels analysis with discrete ribbed filler in the form of ribs
and flexible bonds on strength and
stability by discontinuous functions,
allowing essentially strengthen the convergence of progressive approximation
process and leads to simple algorithm. Bibl. 6. Engl.; sum. in Russ.

DEEP PENETRATION OF
RADIATION THROUGH THICK NUCLEAR REACTOR SHIELDS. **M. Iadze, D. Shulaia, P. Gurckaia.
**“Problems of Mechanics”. Tbilisi, 2009,

¹ 3(36), pp. 71-75. (Engl.).

A basic result of research efforts is the expansion of
solution of the equation of linear transport theory describing deep penetration
of radiation through thick nuclear reactor shields by singular eigenfunctions
of the corresponding characteristic equation. Bibl. 4. Engl.; sum. in Russ.