Summaries

Optimization of Twodimensional gas Flow in the Canals with
the Variable Passage Section**. R. Adamia, A. Manjgaladze.** “Problems of
Applied Mechanics”. Tbilisi, 2001, N2(3), p.11-17,(engl.).

For numerical optimization of the canal’s profile with alternative passage section, two dimensional mathematics model of gas flow, and methodology of corresponding differential equations with application of curvilinear coordinates is created. Optimizing algorithm of gradient type is worked out, realization of which is possible on the computer of middle power. On the example of discharging canal of Diesel-generator the effectiveness of proposed method is shown, where coefficient of gas consumption increased up to 0,87-0,97. 3 ill. Bibl. 4. Engl.; summ. russ.

Dynamic investigation on the hinge-lever system with taking
into account elasticity of links for carriage’s braking with shoes’ one-sided
pressing**. N. Davitashvili, A. Chkhaidze, A. Sharvashidze.** “Problems of
Applied Mechanics”. Tbilisi, 2001, N2(3), p. 18-30,(rus.).

In this paper, the dynamic investigation of the executive hinge-lever system for carriage’s braking with shoes’ one-sided pressing and with taking into account elasticity of links has been given. For the executive plane four-linked system with elastic links, which is singled out from general system, all necessary dynamic parameters, needed for expedient choice of links’ optimal materials, have been determined. 6 ill. Bibl. 9. Russ.

To the construction of the model of angin’s actuators
synthesis procedure**.** **G. Chkhaidze, A. Chkhaidze, T. Mchedlishvili. **
“Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p. 31-36,(rus.).

The analytical expressions of transfer functions are revealed, necessary for use in models of a various degree of approximation to complete dynamic model of researched multicoherent system. Bibl. 3. Russ.

Research of the Shifting Gear in the Planetary Mixer
Transmission.** G. Imedashvili, K. Imedashvili, Z. Tsintsadze, V. Khuchua.**
“Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p. 37-40,(rus.).

Even the most insignificant examination of the gear shifting function of the mixer will lead us to the qualitative optimum processes. Applying to the analytical methodology the research results are reliable. 3 ill. Bibl. 7. Russ.

Examining Hooking Principles for Ellipsoid Gears.** R.
Varsimashvili.** “Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p.
41-46,(rus.).

Equations were established as a result of studying principles of conical cogwheels. These are equations for hooking, contact lines, and side and hooking surfaces. 3 ill. Bibl. 3. Russ.

Dynamical investigation of a plane six-link mechanism of
sewing-machines for the purpose of improvement of the thread interlacement in a
material**.** **N. Davitashvili, L. Demetradze, L. Kapanadze, N. Pkhakadze.**
“Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p. 47-54, (rus.).

The dynamical investigation of a plane six-link mechanism for the thread stretching (with a needle-leader) of sewing-machines for the purpose of studying a real laws of motion of mechanism links and improvement of the thread interlacement in a material has been given. 7 ill. Bibl. 6. Russ.

The Problem of Vibro-protection of Biomechanical Systems**.
H. Tsulaia, M. Tsulaia.** “Problems of Applied Mechanics”. Tbilisi, 2001,
N2(3), p. 55-56,(rus.).

In this report there is examined the new approach to the problems of vibro-protection of the human – operator, based on the taking intro consideration of physiologic factors of human’s body at the local influence of vibration. The analysis of the carried out experimental examinations in the wide range of frequency changes of the influencing vibration, have revealed the effect of synchronization of fluctuations of muscle bio-electrical activity with the mechanical fluctuations of human’s upper limb. There are found independent from mechanical resonance regimes of resonance fluctuations of muscle bio-activity, unique for each person. There are given the practical recommendations for their use. Russ.

Classification and dynamical analysis of the motion for
slide-block of a crank-slide mechanism with clearances of a diesel engine of
railway refrigIrator-car. **G. Sharashenidze, S. Sharashenidze.** “Problems
of Applied Mechanics”. Tbilisi, 2001, N2(3), p. 57-62,(rus.).

In this paper, classification and dynamical analysis of the motion of translation kinematic pair with clearance for a crank-slide mechanism of a diesel of railway refrigirator-car have been given. The problems of diesel reliability have been highlighted. A dynamical model of translation pair with clearance has been given. Mathematically formulated initial conditions for a passage from one form of slide-block’s motion to another have been obtained. 6 ill. Bibl. 8. Russ.

Pulsation flow of viscous liquid in a semi-infinite circular
tube.** B. Tsutskiridze.** “Problems of Applied Mechanics”. Tbilisi, 2001,
N2(3), p. 63-66,(rus.).

The title problem is studied for the case in which the flow of viscous liquid is due to the pulsation of pressure gradient. The pressure function may be an arbitrary function of time variable. The physical characteristics of liquid movement are found. 2 ill. Bibl. 9. Russ.

Synthesis of the mechanisms on the base of geometrical
regularities**. R. Gogodze.** “Problems of Applied Mechanics”. Tbilisi, 2001,
N2(3), p. 67-69,(rus.).

In this paper, basing on geometrical regularities, new mechanisms for simultaneous drawing and skirting an ellipse have been considered. 4 ill. Bibl. 3. Russ.

Research of lever mechanisms for drawing the projections of
some curves, given by crossing of different geometrical bodies.** G.
Naruslishvili. **“Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p.
70-78,(rus.).

It is carried out the research of lever mechanisms for drawing functional curves, given by crossing of surfaces of geometrical bodies. 7 ill. Bibl. 7. Russ.

Influence of stress concentration and scale factor on fatigue
resistance subject to statiSTIC theory**. Z. Seskuria.** “Problems of Applied
Mechanics”. Tbilisi, 2001, N2(3), p. 79-82,(rus.).

Given is influence of stress concentration and scale factor on fatigue resistance subject to statistic theory, on basis of which is developed an equation providing ability to make complete probabilistic diagrams of fatigue of parts of machines which characterizes dependence of durability and breaking stress on sample’s diameter, gradient of stress and probability of destruction. 2 ill. Bibl. 3. Russ.

To calculate over-measures by uSing computer technologies. **
D. Gordeziani.** “Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p.
83-85,(engl.).

The results of calculation of over-measures on a mechanical treatment by using computer technologies are shown in this article. 2 ill. Engl.; summ, russ.

The formal theory of Transformable systems** G. Tevdoradze.**.
“Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p. 86-88,(rus.).

In the given article the author has accomplished the formalization of informal (substantial) axiomatical theory of transformable systems on the basis of the formal axiomatical theory of Predicate Calculus. This action allows us to present even more exactly the theory of transformable systems well-known in engineering (constructed by Prof. E. Medzmariashvili) as a mathematical theory. The absolute symbolization constructs itself the pure mathematical expressions operable conviniently while fulfillment of the strict mathematical proof. Bibl. 7. Russ.

About the stable method of sum of transformations of Melline
with changed underintegral function**. A. Hamidov. **“Problems of Applied
Mechanics”. Tbilisi, 2001, N2(3), p. 89-92,(rus.).

Acad. Tikhonov A.N. has given a new method for calculation of the coefficients of Furye accordingly to the given equally limited ortonormed on certain distance set of functions. Appropriate task has been solved for Furye transformations. The same task has been solved for the Melline transformations in present work. Bibl. 2. Russ.

Thermal Estimation of rubber-based Guide Bearings with water
Lubrication**.** **Y. Lomidze. **“Problems of Applied Mechanics”. Tbilisi,
2001, N2(3), p. 93-95,(rus.).

The article deals with thermal estimation of guide beatings of hydraulic turbines with rubber supporting shells, which are lubricated and cooled with water.

The article investigates the feasibility of replacement of bearings with oil-lubricated babbitt shells with water-lubricated rubber shells on the operating turbines wherever the technical conditions allow. 1 ill. Bibl. 3. Russ.

On the calculation of cultivation tools’ parameterS**.**
**N. Pkhakadze.** “Problems of Applied Mechanics”. Tbilisi, 2001, N2(3), p.
96-100,(rus.).

The components of draught resistance of a tillage wedge in terms of soil compression (frontal), as well as the parameters of soil particles movement along its surface have been determined. 2 ill. Bibl. 2. Russ.

On the problem of the bending of a sloping shell weakenEd by
a circular or elliptical orifice**. N. Bulia, I. Badzagua.** “Problems of
Applied Mechanics”. Tbilisi, 2001, N2(3), p. 101-104,(rus.).

The problem of the bending of a sloping shell weakened by a circular or elliptical orifice is disscused. The boundary equations of orifice are given. The Bubnov-Galerkin eqiations, simplified by Dirac function are used in the calculation of the bendings. Bibl. 6. Russ.

The bending of calculation of multilayer anisotropic slope
shells with circular apertures. **I. Badzagua, N. Bulia. **“Problems of
Applied Mechanics”. Tbilisi, 2001, N2(3), p. 105-107,(rus.).

The bending of calculation of multilayer anisotropic slope shells with circular apertures is considered. Flexures caused by unknown longitudinal forces and moment are adjacent to the contour of the shell. The flexures are represented as Fourier series and their coefficients are defined from the boundary conditions of the apertures. Bibl. 4. Russ.