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,
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.