The article discusses the process of sulfuric acid alkylation used to produce high-octane gasoline, as well as the design of jet reactors, their advantages and disadvantages. Based on the existing drawbacks of jet reactors, the development of a new high-efficiency jet reactor design has been proposed.
Keywords: reactor, sulfuric acid alkylation, isosurface, isocontours, gasoline, fractions, jet type, industry, oil refining
a method for calculation of electro-hydraulic raspylivatelja liquids. Theoretical dependences of the median diameter of aerosol drops on the fluid flow rate at different number of generator nozzle holes, on its main design parameters are presented.
Keywords: aerosol, dispersion, drop, generator, electrohydraulic atomizer
The article deals with the integration of a three-dimensional model of a parametric architecture object created by Autodesk Revit and its finite element model. The features of IFC formatting expand the possibilities of presenting design data for solving problems of integration information and computational models. The advantages and disadvantages of this approach to the modeling of unique high-rise buildings, the architectural solution of which is a complex geometric surface, are illustrated. The resulting finite element models allowed us to perform a static calculation and analyze the characteristic movements of the frame elements of a unique building. The practical significance of the presented research results lies in the possibility of using a parametric architecture for designing objects using BIM with subsequent analysis of the stress-strain state of the frame of a building or structure.
Keywords: information modeling, parametric architecture, finite element method, architectural model, calculation model, integration, IFC formatting
The article presents the results of an experimental study of methods and means of technical diagnostics of the engine cylinder-piston group during cold, idle scrolling of the crankshaft
Keywords: cylinder piston group, gas flow from the crankcase, technical conditions of the experiment
This article contains a survey of the building in the city of Rostov-on-don. A detailed visual inspection of the object of study, assessment of the technical condition of the main bearing building structures, analysis of the causes of defects and damage, pre - installation of the category of technical condition. As a result of the survey developed recommendations for the design, measures to restore or strengthen the building structures.
Keywords: technical condition, categories of technical condition, inspection, visual inspection, detailed examination, building structures, defect, damage, repair, restoration, operation
The legal status of water bodies implies special measures aimed at preserving and preventing negative processes within the boundaries of a water body. A zone with a special mode of use is the territory, within the boundaries of which the mode of using the object for the purpose of protection and (or) to protect the environment is established. In modern geodesy, special satellites are used that are part of the global positioning system. The object is tied to the existing geodetic network, the identification marks are laid in a minimal amount, then aerial photography is performed and the photoplans are “stitched”. The emergence of electronic and unmanned measuring instruments during a complex of geodetic works greatly facilitated the work of geodetic engineers, allowing them to increase the productivity and accuracy of work performed when using such instruments.
Keywords: water protection zone, zones with a special mode of use, water bodies, unmanned aerial vehicles, coastline, coastal protective strip, aerial photography, GNSS receivers, surveying equipment, orthophotomap
In this article such spheres activity as independent fire examination and assessment of property are considered, distinctive features of each activity are considered. Basic elements of each of this field of activity by what documents is guided in work what activity are given
Keywords: the fire, property assessment, fire examination, the appraiser, the expert-builder, accident, the caused damage, judicial proceedings, the conclusion, recovery repair
The procedure of conducting judicial construction technical expertize of the real estate objects damaged as a result of flooding is considered, the main events held construction experts on the place of flooding and the necessary list of documents necessary to start a research are listed.
Keywords: flooding, judicial construction technical expertize, accident, the caused damage, judicial proceedings, the conclusion, recovery repair
This article discusses the features of the power plant control based on renewable energy sources for additional and emergency power supply of surface robotic systems. This kind of integrated power plant can be built on the basis of wind and solar energy converters and produce at least 10-15% of all electrical energy required for the vessel. For the most important element of the KSEU - wind power plant (wind), the Electromechanical torque control on the shaft of its rotor is considered. For this purpose, firstly, the problem of controlling the angular velocity of the rotor rotation by means of variable geometry elements (IEG) of the VEU of perspective type is solved. As an IEG, the tunable distance from the lower part of the rotor to the upper part of the lower guide structure of this wind turbine is considered. Simulation of the equations of the controller for the particular case of stabilization of the rotation speed of the rotor. Secondly, the structural scheme of electrical control of the output characteristics of the wind turbine is justified and the method of selection of some key elements of this scheme is given. Features of realization of the electric circuit of connection of VEU, solar panels (SP) and diesel generator set in uniform KSEU are considered. It is shown that the constructed integrated control system of wind turbines is able to effectively solve the problem of parrying external wind disturbances.
Keywords: complex power unit, robotized surface platform, advanced windmill, solar panels, structural wiring diagram, hybrid controller
Parameters of logging machines are determined by the characteristics of the subject of labour, in particular the size of trees. In stands the sizes of trees vary and have stochastic character. This leads to the difficulty of determining the design tree for the felling machine or calculating the weight of the wood moved by the transport machine. The problem is complicated by the fact that the design of the forest machine should ensure the efficiency of work in different stands. The solution of the problem of determining the calculated characteristics of the subject of labour (characteristics that determine the values of external forces acting on the forest machine) can be based on the analysis of regularities in the structure of stands by thickness. The purpose of this study is to describe a method of constructing stochastic models of the structure of the stand by thickness in the design of forest machines and an example of its application. The proposed method makes it possible to form a stochastic model of the tree stand structure by thickness for the forest area under study and covers procedures from the collection of initial data to the generation of the tree diameter algorithm. Generation algorithms obtained by the method can be used in the development of simulation models for computer experiments aimed at calculating the optimal parameters of forest machines.
Keywords: forest machines designing, stochastic simulation, stand structure by thickness, tree diameter distribution, simulation modeling, computational experiment on the computer
The article proposes a scheme of modernization of the gasoline engine to work on a gas-air mixture. This article discusses the technical characteristics of the engine on gasoline which is recommended by the manufacturer. The characteristics of the engine operation on the gas-air mixture without alterations, and the characteristics that the engine shows when working on the gas-air mixture with the already made changes are also given.
Keywords: car, gas equipment, intake valve, compression ratio, mixture pressure
The exposure of the Aires resonator to electromagnetic radiation with a frequency of 6 GHz is considered. The resonator is a silicon plate with a diameter of 7.4 mm with circular grooves applied by etching. The resulting resonator with a thickness of 0.5 mm contains 4084101 circles of various diameters, which in orthogonal cross sections represent rectangular slits 0.2 μm wide and 0.6 μm deep. It is assumed that the radiation source falls on the resonator evenly from all sides. Thus, we have a radiation source in the form of a hemisphere, the radius of which is substantially larger than the diameter of the resonator (10 m). The intensity of the incident radiation and the frequency of the radiation are assumed to be known. It is necessary to find: the intensity of the radiation at some point in space above the resonator. (Receiver). If the radiation falls on the resonator not in the slot, then a reflection occurs (the angle of incidence equals the angle of reflection). If the radiation falls into the gap, then the reflection does not occur, and absorption occurs. It is assumed that radiation is diffracted on the slits. If you change the time with a certain step, you can calculate the intensity at any point of the receiver at any time. As a result of irradiation of the resonator over its central part, periodic radiation with frequencies of 6.85 GHz and 5.38 GHz is generated. At other frequencies, radiation is generated that is not periodic and is similar to chaotic radiation. The resonator can be considered as a converter of the incident periodic irradiation into other periodic radiations. These periodic emissions have frequencies that can be resonant for some molecules and parts of living organisms that make up the cells. By varying the depth and width of the slits on the resonator, the size of the resonator and other parameters, it is possible to obtain specific frequencies to which particular components of living cells are sensitive. This will allow targeted action on the cells of a living organism.
Keywords: mathematical modeling, structured silicon surface, high-frequency electromagnetic radiation, resonant frequencies, living organisms
the paper presents the characteristics of the leading on the market types of structures and types of materials used in the construction of translucent roofs of glass-filled airports , based on the analysis of which the technology is promising. Also are described innovative developments applicable in the field of study.
Keywords: translucent roof, triplex, tempered glass, airport, single-chamber double-glazed window, long-span coating, roofing, coating, translucent construction, glass roofing, panoramic roofing, glass coating
Some approaches to assessment of soundness of investments necessary for implementation of results of research engineering are described. It is proposed to use the method of variation of parameters with the establishment of some restrictions. The results of the application of the proposed methodology are given on the example of evaluating the soundness of investments in the technology of unburnt synthanite from natural raw materials in the apparatus with vortex layer and the production of wall stones based on it. It is rational to use the proposed methodology in the formation of an investment plan, the development of business plans, and the implementation of graduate qualification work. Article is published within implementation of the program of the International Forum «Victorious May, 1945».
Keywords: construction materials producing industry, unburnt synthanite, apparatus with vortex layer, innovation, commercial soundness of investments, investment prospects, method of variation of parameters, uncertainty
The Calculations of the electric network modes are based on the determination of electric power losses during transportation.The calculation methods used are based on the Newton method and the Jacobi matrix. The considered version of the calculation (by a number of transformations) with a small number of iterations allows to obtain the same results as when using the Newton method.
Keywords: matrix of nodal resistances, complex resistivity specific increments, losses of electric energy, compensating devices, algorithm, quadratic model, mathematical model