#2(47), 2012
SUMMARIS
kinematical analysis of
spherical six-bar hinged automatic manipulator. N. Davitashvili, V. Abaishvili. “Problems of Mechanics”.Tbilisi,
2012, ¹ 2 (47), pp. 5-12, (Engl.).
Is given the description,principle
of operation and kinematical analysis of spherical six-bar hinged automatic
manipulator, by analytical method of that are defined positions, velocities and
accelerations of output links and their points. The obtained results give the
possibility to solve the inverse task of kinematics as well as task of dynamics
with consideration of friction and clearances in kinematical pairs. 3 ill. Bibl. 8. Engl.; sum. in Russian.
characteristic
differential equations 0f additional Break-contact-break (B1C2B3)
motion of optimal brake leverage transmission. G. Sharashenidze, T. Natriashvili,
M. Âen
Chaim. “Problems of Mechanics”. Tbilisi,
2012, ¹ 2(47), pp. 13-20, (Engl.).
Is developed an original dynamic model of executive
slider-crank refrigerator carriage’s chiller machine’s compressor mechanism and
are carried out researches of mechanism’s dynamic parameters with taking into
account the phenomenon of variable disaxial and
conditions of its existence, caused due to wear of joint connections. The
obtained results of dynamic analysis of the mechanism provide the significant
economic benefits – would be reduced scheduled maintenance costs of chiller
machine and compressors, as well as detention of carriages, is increasing the
time between repair operations and would be improve technical performance. 3 ill. Bibl. 11. Engl.; sum. in Russian.
AUTOMATIC system of
INCREASing of TANDEM WHEELed self-propelled chassis turnability.
R. Makharoblidze, I. Lagvilava,
O. Asatiani, A. Kobakhidze.
“Problems of
Mechanics”. Tbilisi, 2012, ¹ 2(47), pp. 21-27, (Engl.).
In order to improve the turnability
properties of the tandem wheeled self-propelled chassis is offered method of
automatically lifting of one wheel of tandem in the process of turning. Are
defined the conditions of automatic system stability and optimal combination of
parameters of links accordingly the transition process damping stability
criteria. 1 ill. Bibl. 3. Engl.; sum. in
Russian.
THE FLOW OF WEAKlYelectroconductiNG LIQUID BETWEEN POROUS WALLS. V. Tsutskiridze
, L. Jikidze. “Problems of Mechanics”. Tbilisi,
2012, ¹ 2(47), pp. 28-34, (Engl.).
Is studied the
pulsating flow of viscous incompressible liquid between porous walls with head
transfer when in perpendicular of walls is applied external uniform magnetic
field. The flow of liquid is caused due the pulsation drop of pressure and the
pulsation movement of the porous walls. The physical characteristics of liquid
flow are found. Bibl. 10. Engl.; Summ. in Russian.
MATHEMATICAL
MODELLING OF TRANSIENT PHENOMENA IN THREE-PHASE ELECTRICAL SYSTEMS. A. Tvalchrelidze,
G. Gavashelashvili, P. Chanturidze.
“Problems of Mechanics”. Tbilisi, 2012, N 2(47), pp. 35-41, (Engl.).
There is considered
in a given work mathematical modeling of transient phenomena in three-phase
electrical systems in the presence of various types of asymmetrical
disturbances. Topological matrices of three-phase electrical systems are
constructed on the basis analogous single-phase matrices. There is shown that
capabilities of modern personal computers enable to compute complex three-phase
systems without using the symmetrical component method. 5 ill. Bibl.2. Engl.; sum. in Russian.
second law of
thermodynamics and regeneration of useful energy from environment energy.
A. Aptsiauri. “Problems of Mechanics”. Tbilisi, 2012, ¹ 2 (47), pp.
42-49, (Engl.).
In the work is offered a new formulation of the
second law of thermodynamics, as well as a design diagram and parameters of
installation that gives the possibility to energy production by reducing the
water temperature.2 ill.Bibl.
8.Engl.; sum. in Russian.
NEW METHOD OF REGISTRATION OF REACTION
OF THE HUMAN ORGANISM ON THE VIBRATION LOCAL INFLUENCE. H. Tsulaia, M. Tsulaia, M. Jamburia.
“Problems of Mechanics”.Tbilisi, 2012, ¹ 2(47), pp. 50-53, (Engl.).
Dependences of the intensity of
mechanical oscillations transmitted to a human hand, and changes of the
total bioelectric activity of the muscle groups on the local oscillation parameters
in low frequency areas are derived with due acount of the statical forces of
muscle contractions. 3 ill. Bibl. 1. Engl.; sum. in Russian.
analysis of results of
load-carrying ability of girder bridge concerning to other system bridges for
passing heavy-weight cargoes. Yu. Slovinski, D. Balakhadze. “Problems of Mechanics”.Tbilisi,
2012,
¹ 2(47), pp. 54-59, (Engl.).
Are
analyzed results of calculation of reinforcement concrete pre-stressed span
structure of girder split-type bridge with design span ℓd=32.2
m for assessment of possibility of passing the heavy-weight trailers with
cargoes with total weight 104.0 ton-force, 120.0 ton-force or 180 ton-force.
The calculation method of this bridge with overall dimensions G-7 under the
H-30 and HK-80 loadings would be applied for other system bridges and spans.6 ill.
Bibl. 5.Engl.;sum. inRussian.
Modeling of expected
accidents of petroleum products terminal on example of kulevi terminal. g. eragia. “Problems of Mechanics”.Tbilisi,
2012, ¹ 2(47), pp. 60-63, (Engl.).
In
the article are considered modeling
of expected accidents of petroleum products terminal on example of kulevi
terminal. The carried out analysis shows that at risk calculation applied programs
gives the possibility to significantly accelerate the possibility of
calculations and compilation of industrial safety declaration explanatory
reports with rather high accuracy. Is possible to software develop lot of
accidents and disasters scenario that would be occurred in Kulevi
oil terminal. 3 ill. Bibl. 4. Engl.; sum. in Russian.