No 1 (2014)

This paper investigates the effect of cutting tool construction, cutting conditions and overhang on the frequency during machining. The standard cutting tool and cutting tool with horizontal holes arranged in a chess-board pattern, made of hardened steel AISI 5140, were used. Three different workpieces made of aluminum, steel and cast iron were used. The experiments were carried out, based on single-factor experiment, on the lathe model 16K20VF1 (Russia). Results of experiments showed that the most significant parameter influencing the vibration is overhang variation. Besides, the optimum cutting conditions for the machined materials were found at different levels.

The algorithm of localization of an irregular neutron flux source in the core of the nuclear reactor is suggested. The algorithm allows determining the position of the neutron flux source using the signals of the three or more nearest to the source detectors. The detectors are fission chambers distributed under the bottom of the core. The problem is solved in the two dimensional approximation. The algorithm is based on the experimentally obtained functional connection between the camera signal and the distance to the source of the flux increase. A system of equations in three unknowns is formed of the three equations describing cameras signals. The system is solved by numerical computations. The algorithm was implemented in the program in the C++ language. The results obtained during the experiments carried out on the reactor in the years 2007-2008 when local increases of the reactivity were generated were used as the input data for measuring the accuracy of the algorithm.

Numerical three-dimensional modeling of Ivankovskoye reservoir allows to estimate the influence of thermal inflow of the electric power station Konakovskaya. The model have been used for studying a thermic structure of the reservoir upon extremely hot meteorological conditions.

An algorithm of the incremental elastic-plastic analysis of a continuous steel beam is presented in this paper. An elastic limit state has been determined, and formation of plastic hinges and collapse mechanism has been investigated. The effect of the shakedown is introduced and the maximum shakedown load is determined.

The problems of turbidity flow with suspended solids analyzer using photometric principle determining the light absorption and scattering in the layer of the analyte, provided that the light source and the detector is located on the same axis or at an angle 90° (nephelometer). However, to determine the rate of siltation of reservoirs, we need to know the weight of suspended particles per unit volume (concentration). Based on research conducted at the reservoir Des obtained correlations between measurements obtained with the nephelometer and the concentration of suspended solids (TSS).

Considered the structure of carbonate-silica of Triassic transition sections and intermediate zones of the South-Eastern Pamirs and had been proposed their sequence-stratigraphic interpretation. Revealed levels of eustatic fall of sea level during the Triassic period.

The natural gas consumption is of more higher rate increase all over the world, than consumption of petroleum. This is connected with its greater ecological purity and lower cost. Nowadays all types of natural gases are widely used both as a fuel for auto-motor transport and in many branches of industry.

Use of coiled-tubing technologies when developing fields of hydrocarbons on ANK ‘Bashneft” and the Urengoy oil-gas condensate field is analysed.

The article studies the chemical deposits (mineralogy) and structure of the ores of Aynak ore deposits. This article have a results of macroscoping and microscoping reaserche after drilling of china company (MCC, 2010) and drilling of Russian geologist (1978).

In the work up the technique of the decision of problems about the little deflections of beams from ideal hard-plastic material, with various kinds of fastening, for want of action of the asymmetrically distributed loads with allowance for of preliminary stretching-compression is developed. The developed technique is applied for research of the strained-deformed condition of beams, and also for calculation of a deflection of beams with allowance for of geometrical nonlinearity.