SUMMARIES

 

Dynamic analysis for the hinge-lever system with elastic links and centred masses used for the braking of a wagon with shoe’s unilateral press. N. Davitashvili, A. Chkhaidze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.  11-23,  (rus.).

Dynamic analysis for the hinge-lever system with elastic links and centred massed for the braking of a wagon with shoe’s unilateral press has been given. To provide long-term and reliable work of the system, nonlinear differential equations, expressing real rules for a motion of drive, mechanism and centred masses (studying oscillatory occurrences of masses) for executive plane four-link system and centred in three points of a connecting rod, have been obtained. 4 ill. Bibl.5. Russ.

 

On dynamic synthesis of electric locomotive traction drive system. G. Ghkhaidze, A. Chkhaidze, T. Mchedlishvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 24-29, (rus.).

In accordance with the known method of the synthesis of multiconnection drive systems by the given transient processes the structural schemes of “separated” and “independent” systems have been plotted. Mathematical models of the dynamics of these systems in transient modes of electric locomotive motion are worked out. Analytical expressions of the wanted processes are obtained and a general scheme of the sequence of mathematical procedures of the synthesis of the considered multiconnection systems is formulated. 2 ill. Bibl.9. Russ.

 

Towards the calculation of resilient-frictional vibration units of mechanisms. V. Gogilashvili, B. Ninoshvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.30-33, (rus.).

Real mechanisms in the form of reduced resilient-frictional vibration units are considered. Methodology is given for the calculation of energy scattering and vibration amplitude for the systems with small non-linearity. 2 ill. Bibl.4. Russ.

 

Rack system for steering the vehicle. R. Varsimashvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 34-37, (rus.).

Rack transmission system with multi-twig round and oval gears is used to achieve the steering of the vehicle. Thorough analysis of the transmission is provided as well as pinion cutting methods discussed. 5 ill. Bibl.6. Russ.

 

Formalisation of dynamic model and classification of supplementary motions for real crank-slide mechanism with clearances. G. Sharashenidze, S. Sharashenidze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 38-43, (rus.).

In this paper, by taking into account existed physical occurrences in the kinematic pairs with clearances, the formalisation for dynamic model of the crank-slide mechanism of the diesel of refrigerator wagon has been given. The classification for supplementary motions of the given mechanism with three clearances has been carried out. The initial conditions for the conversion from one type of supplementary motion to another have been determined. The proper mathematical method has been worked out. 1 ill. Bibl.5. Russ.

 

The kinematik research the joint-lever mechanism, drawing the projections of the curves of intersection of the solids’ surfaces.
G. Naruslishvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 44-50, (rus.).

It is carry out, the scientific research of kinematics of joint-lever mechanisms, maying draw the projections of the curves of intersection of the solids’ surfaces, in particular, of two cylinders (three variants), of prism and cylinder, of two cones, of cylinder and cone. 6 ill. Bibl.5. Russ.

 

Optimal version  of production of shaped parts from wood materials. N. Natbiladze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 51-53, (engl.).

The article reviews the methods of production of shaped parts by means of copying-milling machines, shaping cutter and program operation machines (woodworkers). The article defines the character of technological production price and offers respective drafts, which promote to determination of optimal methods, according to number of parts. 2 ill. Bibl.1. Engl.; summ. rus.

 

On theory of sawing plants. R. Makharoblidze, Z. Makaroblidze,
I. Dzirkvadze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 54-57, (rus.).

The way of producing shavings at sawing plants permits to apply the methods of theory of stroke for describing dynamic processes. Estimated formula of the stroke effort of cutting at sawing is deduced. The examples are offered. 1 ill. Bibl.3. Russ.

 

Analysis of kinetic energy of a crank-slide mechanism with clearances. G. Sharashenidze, S. Sharashenidze, A. Sharvashidze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 58-64, (rus.).

In this paper, the mathematical method for obtaining and investigation of variable kinetic energy of the crank-slide mechanism with clearances in three kinematic pairs of diesel engine has been given. Mathematically formulated expressions of kinetic energy necessary for dynamic investigation of supplementary motion of the mechanism and with taking into account linear and polar, generalized supplementary co-ordinates in the pairs with clearances have been obtained. 1 ill. Bibl.4. Russ.

 

Technological defects of sewing-machines caused by hinged mechanisms, the ways of their elimination and the resistance properties of textile materials. N. Davitashvili, N. Phakadze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 65-72, (rus.).

In this paper, the description of all technological defects of sewing-machines caused by hinged mechanisms has been given. The ways of their elimination and the resistance properties of textile materials have been considered. 7 ill. Bibl.9. Russ.

 

Derivation of Weinstein function and its connection with Kron transformations. A. Milnikov. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 73-75, (rus.).

It is shown, that it is possible to receive the Weinstein function, playing important role in theory of large and complex oscillation systems, as a result of process of imposing of constraints on a base oscillation system, that has allowed to define its connection with Kron tensor transformations. Bibl.5. Russ.

 

Experimental device for determination of quality of surface layer of samples based on the exoelectron emission. Z. Seskuria. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 76-80, (rus.).

In the present essay are given the principle of operation of experimental equipment for determination of quality of surface layer of samples based on exoelectron emission, description of procedures executed during testing of said equipment through measuring of residual stress. The equipment has proved to have large dynamic range, high rate of magnification of 108-109, and 100% efficiency of detection. 5 ill. Bibl.3. Russ.

 

Definition of the critical dependence between tensing forces of the radial sheets and ropes in the deployable two-layer reflector. Sh. Tserodze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 81-83, (rus.).

In the given article there are determined the parameters of the best fit parabolic of the offset surface using the method of least squares. The solution of the given problem enables us to correct the focus of reflector. Besides it, it is parabolic, modified from the nominal parabolic in order to minimize the quadratic average deviation of the real surface of reflector from the possible best fit to a parabolic shape. The new parameters are found in such a manner that the sum of squares for the deviations of observed points Zi from the approximizing function f(Xi,Yi) has its minimum value. The defined function has the shape of parabolic with its focal length and peak. Bibl.6. Russ.

 

Cutting properties of oxide-carbide ceramic materials containing synthetic titanium carbide. V. Tsotskhadze, G. Khvichia,
G. Gotiashvili, K. Gvazava. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 84-86 , (rus.).

Cutting properties of carbide-ceramic materials produced by the autors by cold pressing of powders were studied. Ceramic materials are composed of: 20% TiC  which has been obtained by synthesis from titanium chips and 80% of aluminium oxide Al2O3. 2 ill. Bibl.4. Russ.

 

CAD of milling cutter. A. Mgaloblishvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 87-89, (rus.).

In presented work are done results of creation CAD of milling cutter. Using this method is raising efficiency of engineering work and quality of projecting. 2 ill. Bibl.2. Russ.

 

Computer aided design of round stretcher. A. Mgaloblishvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.90-93, (rus.).

In work happen to results of creation a CAD of round stretcher, real raising efficiency of engineering work and accuracy of data. 2 ill. Bibl.2. Russ.

 

The structural theory of scaled effects of durability.
G. Gvinepadze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 94-95, (rus.).

The article deals with the qualitative structural theory of scaled effects of durability with taking into account the range of factors. Bibl.5. Russ.

 

Special cases of the structural formula of durability and its solution on computer. E. Machaidze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 96-97, (rus.).

Three cases of prediction of durability on stretching of a composite material when filling remains whole are considered. 1 ill. Russ.

 

Application of the theory of random functions to a rating of durability of concrete. M. Pashiashvili. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p. 98-100, (rus.).

It is considered denseness characteristics for the concrete of ferro-concrete column on random functions of its sections. It is obtained the values of normed correlation functions. 2 ill. Bibl.4. Russ.

 

Concentration of the strains in the structural elements caused by the static factors. V. Kharshiladze. “Problems of applied Mechanics”. Tbilisi, 2001, ¹3(4), p.     101-102 , (rus.).

Brief consideration of the problems on concentration of the strains in the structural elements caused by the station factors has been given. Bibl.9. Russ.