No 4-5(56-57) (2017)
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TRANSPORT, MINING AND BUILDING MACHINERY ENGINEERING
8-13 1085
Abstract
The dependences of the turning of the front steerable wheels and the folding of the articulated frame off displacement of the rods of the hydraulic cylinders are considered. The machinery for synchronizing the turning of the front steerable wheels and folding the articulated frame is proposed. The hydraulic coefficient of proportionality between the working volumes of the negative feedback hydraulic motors and the displacement of the rods of the hydraulic cylinders turning the wheels and folding the articulated frame is obtained. The algorithm of motion the motor grader for a given trajectory is given.
TRANSPORT
14-24 816
Abstract
The article extends the theory of automobile cargo transportation on the influence of distance on the results of the work group of vehicles. Made the solution the task of operational planning of transportation of bricks on pallets by automobile transport in the city, defined output in tons, ton-km, the production cost in a individual day of work for each distance of the considered range, established the dependence of the production cost from increasing the distance of cargo transportation verified the adequacy of the test process.
25-36 933
Abstract
In this article reviewed the nonstationary process of heat transfer on warm-up stage of threeway catalytic converter of exhaust gases, installed on automobile with gasoline internal combustion engines. Developed and described a mathematical model for calculating the time of heating of the solid structure of the catalytic сonverter. The initial data are the design parameters and speed rotation mode of the engine, ambient temperature, geometric and thermophysical parameters of the catalytic сonverter. The algorithm of calculation of heating time of the catalytic сonverter includes sequentially the thermal design of the internal combustion engine, the calculation of heat losses in the exhaust manifold, the calculation of heat fluxes in the catalytic сonverter. The mathematical model allows calculating the heating time of the catalytic Converter to its operating temperature at different set of initial data. Analysis of obtained results enables to determine the conditions for shortening the time of heating of the catalytic Converter and, consequently, to improve the efficiency of its work.
36-42 873
Abstract
The article presents the results of studying the characteristics of engine oil G-Profi PSN 40, designed for use in gas engines of power plants fitted to mine. It reflects the issues of the changing characteristics of the engine oil during use and determine the frequency of their replacement. Examines the changing characteristics of engine oils as kinematic viscosity, base number, acid number, and also evaluated the tribological properties of the content of wear products. The conclusions about the feasibility of using the investigated engine oil.
42-47 855
Abstract
The idea that use of hydrogen as the initiating component to the main fuel, leads to increase in indicator and effective indices of ICE is justified. Special attention is paid to physical and chemical properties of hydrogen and its role when burning in the combustion chamber. In article the example of theoretical calculation of parameters of a working body and calculation of separate indicator and effective parameters is carried out. Calculation is made for the petrol four-stroke engine with the distributed injection of fuel and electronic control by a feed system and ignitions, in case of different percentage ratios of gasoline and hydrogen. Results of calculations are analyzed.
47-61 883
Abstract
The influence of the idle time during loading and unloading on the results of the work of a group of vehicles in the aggregate of small motor transportation systems of cargo transportation was investigated. The solution of the problem is represented by the example of brick transport on pallets from the manufacturing plant in the city by rolling stock of general use. The dependencies of the results of the work of a group of vehicles in the aggregate of small motor transport systems have been established, and their verification has been carried out for adequacy of the process under influence.
61-67 787
Abstract
The issue of opportunities to improve the efficiency of intersections in the changing conditions of the traffic load of the city is considered. The influence of the duration of the time cycles of neighboring traffic lights on the length of the vehicle queue that appears between the traffic lights is studied. It is shown that the formation of the queue has a dynamic character, which should be investigated within the framework of the nonlinear dynamics approach.
CONSTRUCTION AND ARCHITECTURE
68-77 1329
Abstract
The article reveals the features of the organizational and technological design of linearextended objects in the context of modern development of information modeling technologies for highways (IMD). The method of automated construction of calendar-network schedules of construction of highways in the MS Project environment is proposed, taking into account the spatial decomposition of a linearly extended object into homogeneous areas. The principles of hierarchical structuring of types of work and technological processes are indicated. An example of a transition from a linear graph and a Gantt chart constructed in the MS Project to network models using the critical path method is given, taking into account the options for stretching frontal and resource links between the work. The conditions for simulation modeling in the MS Project environment for identifying the risks of production and operational management of construction . The approach outlined in the article reveals additional possibilities for designing the organization of construction of linear objects aimed at improving the effectiveness of methods of information modeling in construction.
85-91 709
Abstract
The article considers the ways of improvement of designs of overlappings slightly deepened underpasses. The proposed new design solution for precast-monolithic slabs slightly deepened underground pedestrian crossings with the lower vaulted surface is made on a permanent form of arched profiled flooring. The evaluation of the stress-strain state of beams in linear and nonlinear formulation, are compared. A comparison of technical and economic parameters of basic types of overlaps underpasses.
92-101 658
Abstract
Experimental studies of permanent shuttering of profiled flooring, arched shape on the effect of mounting loads in the construction of precast-monolithic slabs slightly deepened underground pedestrian crossings. Considered the test scheme, valid work profiled flooring, arched shape. The dependences of the deflection from the action of mounting loads. Proven overall stability of the arches of the profiled decking. Recommendations for the use of profiled flooring arched as permanent formwork.
101-107 821
Abstract
The planning of passenger intermodal transport nodes consider like an important part of sustainable transportation system. For projecting of passenger transport junction give consideration in the current urban planning. This article shows the concept of the level of service for functional estimation of different types of transport infrastructure and network of streets. Supposition was made by author about the main indicator of service level of intermodal nodes functional which is used to estimate the transport junction. Author suggests to estimate the level of service of users of intermodal passenger using indicator of total cost of time required to transfer, which are a sum of costs of time required to move from landing to boarding area and time of transport expectation. It is offered to set the boarders of level of service on the basis of inverse distribution indicators of the whole duration of interchanging that was determined using results of researching of different types of intermodal passenger nodes. The development of evaluation scale of levels of service will be performed on the basis of data that were got during the researching of transfer hubs in Vienna. In the future the approbation of this scale using the example of function quality evaluation number of passenger transport nodes of Irkutsk and Moscow and following development of practical recommendation.
107-116 862
Abstract
The article presents the results of the study of the survivability of a multi-storey building in the event of an emergency failure of a load-bearing element of precast reinforced concrete floor. Carrying out of such researches is stipulated by norms of designing with the purpose of maintenance of safety of buildings and constructions and exception of progressive destruction of designs. In the course of the research, the analysis of possible failures of an individual slab of precast flooring was carried out, the impact force of the falling structure on the below-mentioned overlap was taken into account, taking into account the dynamic factor and the possibility of progressive destruction of the building was verified. A concrete case of a failure of a slab is considered as a result of emergency collapse of the cornice part of the external brick wall of a 5-storey residential building. The necessity of reserving the strength of the structure of overlap from hollow-core slabs is revealed. The backup function is performed by interplate connections from concrete keys, which are usually provided to ensure the rigidity of the discs of the floors and the stability of the building under the action of horizontal loads. The load-bearing capacity of typical concrete keys has not been evaluated by the method of Russian design standards under the effect of overlapping the emergency load with the intensity recommended by European standards for the design of buildings and structures. In the conclusions, the expediency of using structural ties of prefabricated ceilings with the purpose of excluding the progressive collapse of multi-storey buildings was noted.
116-126 762
Abstract
In the article some aspects of forecasting the operation of the ventilation systems of residential multi-apartment buildings with decentralized mechanical air removal and natural inflow are considered. The physical and mathematical models of the ventilation system of a residential multiapartment building with decentralized mechanic air removal and an algorithm for calculating such systems are presented. The results of the calculations of the ventilation system of a two-room apartment on the upper floor of a multi-apartment apartment house and ventilation system of a ten-story apartment building with decentralized mechanical air removal are given.
126-134 4170
Abstract
In article the main characteristics of a hot dry and humid climate, constructive solutions of buildings and constructions in these climatic conditions are considered. Examples of the sun-protection devices used for protection of buildings and constructions against solar radiation are given. The causes of temperature deformations and the principles of the device of temperature seams are analyzed. The attention is paid to the main ways of fight against termites, and also antiseptic processing of wood in a hot humid climate.
134-144 889
Abstract
The analysis of the existing housing stock of various construction periods and the degree of wear of structural elements of buildings is given. It is noted that in Novosibirsk, a significant increase in housing stock began in 1921. There is a gradual decrease in the total area in the houses of the old building. The number of buildings, whose wear exceeds 65, is increasing. The number of emergency houses and houses requiring major overhaul or reconstruction is growing. The article discusses the feasibility of creating a cadastre of buildings by types of defects for planning the extension of the life cycle when they are eliminated. The main failures of the foundations and foundations, caused by the influence of the human factor, leading to deformation of buildings, are revealed. These include: - poor engineering and geological surveys; - errors in the design of foundations and foundations; - non-qualitative execution of works during erection of the zero cycle; - violation of operation technology. Detailed errors are revealed that lead to deformation of buildings.
INFORMATICS, COMPUTER ENGINEERING AND MANAGEMENT
145-151 851
Abstract
The problem of taking into account traffic density fluctuations. Based on the analysis of actual traffic intensity values of the mathematical model in the form of a functional relationship, taking into account the month of the year, day of week and time of day. In addition, in the simulation takes into account the different intensity distribution in the different days of the week, holidays and pre-holidays. The evaluation of the adequacy of the model and its comparison with existing methods, which showed that the proposed relationship can be used to calculate the intensity at any given time.
ECONOMIC SCIENCES
151-159 976
Abstract
The article considers the preconditions for the emergence, formation and development of the Eurasian Economic Union, within which common markets for goods and services are created, a free flow of capital and labor is ensured, and strategic tasks are set for convergence of national industries into a common supranational industrial complex. The analysis of the industrial potential of the member states of the Eurasian Economic Union showed that there is a tendency to a fall in the volume of manufactured industrial products and a reduction in investments in fixed assets. Based on the results obtained, the article outlines the mechanisms for developing the industrial potential of the Eurasian Economic Union.
159-165 674
Abstract
This article discusses the participation of transport enterprises in the tender to signing the contract for the provision of services on transportation of cargoes, passengers.. the paper shows and explains the conditions for participation, the requirements to procurement participants, used vehicles, are the basic documents confirming the qualification and technical compliance of the concerned organizations. The formulated tasks, which allows you to successfully pass the competition for the conclusion of the contract.
165-176 752
Abstract
This article describes the tools that are used in the logistics system to motivate employees to teamwork. It was revealed that the motivation of employees allows logistics companies in tradedeficit, not only to keep constant the composition of the team, but to increase the professionalism of its employees without a job. Team work of professional staff in the logistics system is one of the factors of increasing the competitiveness of the company
176-188 1120
Abstract
The article considers the role of the Omsk region in the development of foreign economic relations of the border States of Russia and Kazakhstan. A study of the development of transport and logistics services of the Omsk region. Analyzed the level of development of transport-logistic system of the Omsk region. The favorable geographical position of the Omsk region, development of transport infrastructure, development of business cooperation in the framework of cross-border cooperation of Omsk region and the Republic of Kazakhstan, are important factors to justify the creation of a multimodal transport hub in the region.
ISSN 2071-7296 (Print)
ISSN 2658-5626 (Online)
ISSN 2658-5626 (Online)