#3(16), 2004

SUMMARIES

DYNAMIC ANALYSIS OF A LEVER BRAKING SYSTEM OF RAILCARS TAKING INTO ACCOUNT CLEARANCES AND IMPACTS IN KINEMATIC PAIRS.

N. Davitashvili, G. Sharashenidze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 7 - 19, (Engl.).

It is given the dynamic investigation of hinged-lever braking system for railcars with one-sided press of shoes taking into account clearances in kinematic pairs, when the coefficient of restitution (model of non-elastic impact) equals zero and taking into account impacts in kinematic pairs, when the coefficient of restitution does not equal zero. The obtained results are applicable in projecting new systems of brake of railcars, providing reliable and long work of the system. 4 ill. Bibl 16. Engl.; summ. in Russ.

SYNTHESIS OF A SPHERICAL FIVE-BAR LINKAGE WITH HIGHER PAIR ON THE BASIS OF PLANAR MODELING. Z.Natsvlishvili, G.Namgaladze, G.Tsertsvadze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 20 - 26, (Engl.). The problem of the design of a spherical five-bar linkage with preliniminarily given law of driven member motion is considered. The problem of synthesis is carried out in two stages. On the first stage of the design the constant geometrical parameters of the scheme of planar analog of five-bar leverage are fixed and on the second stage the profile of immovable guide through which the element (roller) of higher kinematic pair moves is determined. The transformation of a spherical five-bar linkage into a planar one and vice versa, from a planar model to a spherical one is done on the basis of stereographic projection. 3 ill. Bibl. 4. Engl.; summ. in Russ.

WASTE OILS AS RAW MATERIAL IN RECYCLING. Andrzej Ambrozik, Janusz Jak?biec. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 27 - 34, (Engl.). The paper presents legal regulations as regards the management of waste oils in Poland and in EU countries. It also provides the estimation of the potential resources in Poland in recent years as well as the information on the most effective waste oil recycling processes in Europe. 3 ill. Bibl. 16. Engl.; summ. in Russ.

EVALUATION OF PHYSICAL, CHEMICAL AND FUNCTIONAL PROPERTIES OF RAPE OIL METHYL ESTERS RME (FAME). Andrzej Ambrozik, Janusz Jak?biec. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 35 - 42, (Engl.). The paper presents the requirements of various specifications for fatty acid methyl esters FAME in Europe and in the world. It also discusses the issues connected with the evaluation of their physical, chemical and functional properties as fuels or fuel oil components. Moreover, some information on the processes taking place in stored plant products is provided. 5 ill. Bibl. 13. Engl.; summ. in Russ.

THE DESIGN OF VIBRATION INSULATOR WITH PLANE RUBBER-METAL ELEMENTS BY COMPOUND LOAD. D. Tvaltvadze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 43 - 47, (Rus.). In this work we can see the constructive decision, working in a similar manner rubber-metal blocks, which allows to reach the self-regulation effect in a dependent of the lengthwise shear size of the vibration insulator stiffness. Specially, with the definite geometry of its cross section is possible to reach the stiffness characteristic, similar to equal frequency. 4 ill. Bibl. 3. Russ.

THE CALCULATION OF RUBBER-METAL SHEARING VIBRATION INSULATOR BY BOUNDARY ELEMENT METHOD. D. Tvaltvadze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 48 - 52, (Engl.). In this work regarded the calculation of rubber-metal shearing vibration insulator by Boundary Element Method (BEM) for plane, fixed dynamical tasks in linear positing. The last is explained by some specific features of the rubber element work to shear, when the linearity of task positing does not leads to big errors of solution. 5 ill. Bibl. 3. Russ.

DYNAMICS OF HYDRAULIC CIRCUIT OF HINGED LIFTING EQUIPMENT OF BLOCK-MODULAR AGGREGATE FOR AGRICULTURAL DESIGNATION. R. Makharoblidze, I. Kikabidze, G. Abzianidze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 53 - 56, (Rus.). The results of the research of dynamics of hydraulic circuit of hinged lifting equipment of block-modular aggregate for agricultural designation are presented. Calculation formulas are presented of kinematics, power and energetically parameters of the rod of hydraulic cylinder, considering the characteristics of demountable modules. 1 ill. Bibl. 2. Russ.

DEFINITION OF COMPLETENESS CONDITIONS OF THE COUPONS.

J. Hajiyev, E. Buadze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 57 - 61, (Rus.). The work is devoted to definition of completeness conditions of the coupons and feature of distribution of knitting machines for their manufacturing. As is known, a basis of completeness conditions of the coupons is the allocation of curves on which reception of corresponding number of details from one coupon is established. The present work, just, also is connected to development of a technique of definition of completeness conditions of the coupons and distribution of knitting machines for their manufacturing, which could be suitable for all kinds of products of the top jersey. As a result of the carried out research work, for practical calculations, it has been prepared corresponding tables on which it is possible to define quantity of the products received from one complete set and number of coupons in one complete set. This technique can be recommended for practical using in manufacture. 1 ill. Bibl. 1. Russ.

IMPROVEMENTS OF A CONDITION OF PARAFFINING OF YARN. J. Hajiyev. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 62 - 66, (Rus.). Maintenance of a normal course of process of high quality knitting of jersey in many respects depends on a degree of readiness of a yarn to knitting. It is established, that because of an additional skew of the paraffin block on the part of a moving string force of pressure upon it decreases. It is revealed, that at a corner of grasp =0 and =90 pressure upon a string has the minimal value, and at = - reaches the maximal value. By liquidation of a corner of a skew of the paraffin block the condition paraffining of a yarn is improves. It has been given formulas what are necessary for determination of pressure of the paraffin block on a string. For liquidation of a corner of skew of the paraffin block it is necessary to establish under it a piece of the correspondingly processed yarn. Therefore position of the paraffin block on a string becomes steady, thus paraffined strings is carried out at a high pressure. In this case paraffining device can work under condition of 0< < , and with a smaller corner of scope . 1 ill. Bibl. 3. Russ.

CALCULATION AND DESIGN OF COMPLEX CONSTRUCTIONAL KNOTS OF AIRCRAFTS ON THE BASIS OF MODERN COMPOSITE MATERIALS. J. Kilasonia, N. Beridze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 67 - 70, (Rus.). Concrete objectives are raised solution of which shall substantially improve methods of calculation fragments different level aircraft. Ways of solution of theses objectives are outlined in common features. Ratios are obtained that may be used for formation of stiffness matrix of longeron finite element and rib from composites. 1 ill. Russ.

THE DYNAMIC FORCES IN THE INSTRUMENTS WITH RECIPROCATING MOTION. Th. Chkhaidze, N. Chkhaidze. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 71 - 74, (Rus.). The exactly method of the calculation of the instruments with block linkage mechanism with due regard for the dynamic forces is proposed. The special design of the instrument is elaborated. The instrument is characterized with the stability of the measurement of the radial clearance and high productivity. The instrument is recommended to use for the checking of the rolling bearings in the different units. 1 ill. Bibl. 4. Russ.

THE INCREASE OF THE RELIABILITY OF BOBBINS OF ROTORS AND ITS ESTIMATION. Z.Belluyan. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 75 - 78, (Rus.). The results of synchronous generators manufactured at present winding refusals and reliability improving method concerning these wingings worked out on the basis of the analysys mentioned is presented. Proceeding from these investigation it has been shown that the reliability of the new construction synchronous generators excitation winding reliability for 10.000 hours has been improved by 43 % compared with the old construction reliability. Bibl. 4. Russ.

TO CALCULATE SP FOR SYNCHRONIZED GENERATORS WITH 100 kWh CAPASITY. Z.Belluyan. "Problems of Applied Mechanics". Tbilisi, 2004, # 3 (16), pp. 79 - 82, (Rus.). Methods of calculating of single and grouped kits of spare parts (SP) special purpose synchronized generators with kWh capacity based on statistically acceptable studies due to their safety. Bibl. 2. Russ.