Vol 18, No 1 (2017)

This article discusses one of the possible methods of restoring the strong points of observation stations at deformation monitoring. It is shown that can be used to restore the coordinates of thereference frames so-called “stable point”. Such points are characterized in that their coordinates in the interval between two measurements do not change over the range of accuracy of measurement adopted.

Results comparison of efficiency of thermal protection of basalt fibers and gypsum polystyrene concrete. The thermal efficiency of the piping of the heating system depends on the thermal insulation. Effective heat protection to create the conditions to reduce losses of heat for heating of buildings.Thermal efficiency of protection depends on the physical properties of the material and the thickness of the insulation layer. The optimum thickness of thermal insulation is an important element in the rational use of materials and thermal energy.Thermal protection must ensure the surface of the insulation temperature of not more than 45 °C if the coolant temperature is over 100 °C. Thermal protection must ensure the surface of the insulation temperature of not more than 35 °C if the coolant has a temperature below 100 °C.Heat insulating material based on gypsum polystyrene concrete created at the RUDN University. Crushed or granulated polystyrene can be used for the production of this material. The material has a density of 300 kg/m3. Strength under axial compression is an average of 0.6 MPa. Coefficient of thermal conductivity equal to an average of 0,074 W/(m °C).Calculation and comparison of the effectiveness and cost of the thermal protection of various materials are presented. This material is more than six times less thermal insulation made of basalt fiber.The use of plaster polystyrene for thermal insulation of pipelines and equipment of calorific points to successfully solve the problem of decrease in losses of heat at operation of heating systems.

In this article, the laboratory tests executed with a research objective of mechanical properties of technical coated fabric are described. Experiments included uniaxial tensile tests in the warp and weft directions. For measurement of displacements and deformations on a surface of a sample the method of digital images correlation has been used. The numerical simulation of material has been constructed and calculated to simulate the experiments. Good convergence between results of laboratory and numerical researches is shown

The practical examples of umbrella-type shells and domes, methods of their genesis are given in the article, the prospects for future application are considered. Two innovational umbrella type surfaces of six equal elements, proposed for adaptation by Strength of materials department of PFUR, their application illustrated by the sports center roof.

In the article the conditions are properly secured work pieces when turning on CNC machines. The mathematical expressions that guarantee no damage while fixing in the chuck work pieces of ductile and brittle materials. Expressions allow determining the minimum length of the fastening pieces in the cartridge for these materials, as well as for the calculation of permissible cutting forces. It is shown that by adjusting the processing conditions may prevent damage to the work piece surfaces at the impossibility of changing their length in the fixing chuck.

The article presents the results of computer simulation of the process of mutual diffusion of two- component medium. We developed and tested an algorithm simulation of diffusion in a two coextensive medium by cellular automaton and algorithm modeling diffusion neravnoobemnoy environment by direct Monte Carlo simulation. The simulation determined the dependence of the diffusion length of the number of particles participating in the process, and plotted the ratio of components of the medium influence the length of the diffusion process, which may be used to estimate the parameters of the real practical diffusion process.

The article is dedicated to the study of mineral composition and genesis of Desiatiy Khutor deposit of bentonite clays located in the Republic of Khakasia. The mineral composition of natural samples and fraction < 0.5 mm was studied in details by X-ray diffraction. On the basis of the geological structure,tectonic and mineragenous zoning data, the deposit was designated to a particular genetic type of deposits, lying among coal-bearing rocks. Promising areas for bentonite exploration were highlighted within this bentonite- bearing province.