Vestnik SibADI最新文献

{"title":"Evaluation of dispersion reinforcement in concrete in terms of strength and crack resistance","authors":"Y. Pukharenko, D. Panteleev, M. I. Zhavoronkov","doi":"10.26518/2071-7296-2022-19-5-752-761","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-752-761","url":null,"abstract":"Introduction. The purpose of the study was to evaluate the effectiveness of dispersed concrete reinforcement in terms of strength and crack resistance.Materials and methods. When conducting research, test methods were used, regulated by the provisions of national standards, equipment specially designed for this study was used.Results. The results of testing fiber-reinforced concretes made using low-modulus and high-modulus fibers are presented.Discussion and conclusions. As a result of the analysis of the data presented, it is shown that in order to assess the effectiveness and the correct choice of reinforcing fibers, it is not enough to characterise fiber-reinforced concrete only by tensile strength in bending. For a more accurate assessment, it is proposed to use crack resistance characteristics, for example, the critical stress intensity factor, or to supplement the description of the advantages of dispersed reinforcement with the features of the behavior of fiber-reinforced concrete under load.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41958566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weathered quartite sandstones of the Kursk magnetic anomaly as a raw material for construction industry","authors":"V. Lesovik, E. Fomina, I. Cherepanova, A. N. Ryapukhin","doi":"10.26518/2071-7296-2022-19-5-728-737","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-728-737","url":null,"abstract":"Introduction. The features of composition and structure of quartzitic sandstones of the Kursk Magnetic Anomaly affected by weathering processes, which do not meet the requirements of normative documents for obtaining crushed rock, are considered. The reserves of these rocks have not been approved as minerals and are currently stored in the form of large-tonnage dumps on the territory of the plant.The main challenge to be solved within the framework of the work is aimed at solving the issue of expanding the raw material base of the construction industry.Materials and methods. Efficiency evaluation of the weathered quartzite sandstone use is based on the study of indicators of physical and chemical properties. The analysis of mineral rocks was carried out using digital microscopy, the method of X-ray phase analysis. The experimental studies of the kinetics of grinding raw materials have been carried out. The activity of composite binders using weathered quartzite sandstone was studied in accordance with GOST 30744-2001.Results. It is shown that genetic features of weathered quartzitic sandstones are caused by defective crystal structure of quartz, they are also characterised by low frost resistance and strength. The grinding efficiency of weathered quartzite sandstone is 4 times higher in comparison with untethered. It has been established that the use of these raw materials to produce composite binders makes it possible to reduce the proportion of Portland cement in the mixture by up to 50% and increase the strength of the composite binder by 20%.Discussion and Conclusions. In consideration of current trends in the transition of the construction industry to multicomponent compositions, it is advisable to use weathered quartzite sandstone as an unconventional quartz raw material in obtaining energy-efficient building composites of a new generation.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49143153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of production specialisation level on efficiency of technical service and safety of buses operation","authors":"A. Denisov, E. Feklin, A. Ignatov","doi":"10.26518/2071-7296-2022-19-5-666-679","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-666-679","url":null,"abstract":"Introduction. The focus is on improving the maintenance and repair system of city buses on the scale of large cities in particular and regions in general. Due to the increase in the number of rolling stock, the load on the existing technical service organisations increases, which in turn leads to their overload. Consequently, the efficiency and safety indicators of bus operation are reduced. The proposed solution is to develop a system of centralised specialised production.Materials and methods. The system of maintenance and repair is considered from the point of view of the marginal utility theory. Dependences of total and marginal utility on the quantity of goods (services) are presented. The term ‘specialization’ is described from the point of view of the motor transport industry. The necessity of combining universal and specialised posts is justified.Results. The results of the experimental study on ten passenger enterprises are presented. The results of calculations of the efficiency indicators of the current repair area are given. The dependence of annual costs and profit of the current repair zone of ten posts on the level of specialisation is reflected. The dependence of the coefficient of technical readiness of buses on the scale of parks in Russia is analysed. The natural factors, influencing the coefficient of technical readiness are presented. An adequate mathematical model with physical variables of the dependence of the coefficient of technical availability on the scale of the enterprise and the level of specialisation was obtained with further processing and verification of the results.Discussion and conclusions. The results of the study are intended for the enterprises of passenger transport. The data obtained will allow to develop a system of cooperation of technical service production facilities in order to improve the performance of requests for maintenance and repair of rolling stock.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42431761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The result of an evaluation for traffic flow characteristics considering the movement of personal mobility equipment by modeling a road traffic section","authors":"A. Jung, A. Shevtsova","doi":"10.26518/2071-7296-2022-19-5-716-726","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-716-726","url":null,"abstract":"Introduction. Today there is an acute problem of increasing the number of accidents involving personal mobility devices (PMD). A sharp increase in these vehicles on public roads poses a threat to both vehicle drivers and pedestrians.Materials and methods. In this article, the results of the evaluation of the traffic flow characteristics of individual mobility devices under different conditions with the help of road section modelling are presented. The aim of the study is to obtain real values of traffic flow characteristics for further analysis and comparison, which in the future will reduce the accident rate with the participation of personal mobility devices. It is suggested a modelling method to be used to analyse the characteristics of traffic flow changing with the introduction of these devices. The objectives of the study are to analyse the number and types of accidents involving personal mobility devices, to identify conflict zones in the interaction of personal mobility devices with other road users, and to select the road environment to be modelled. Both positive and negative aspects of the introduction of PMD in everyday life are presented, and the main types and characteristics of personal mobility devices are briefly considered. Aimsun simulation software was used to create models of a road network section with the introduction of mobility devices in various traffic situations to evaluate their impact on traffic flow.Results. A road section model has been created to automate information processing and to consider different situations of PMD movement in an urban environment, which will allow further comparative analysis to select the safest conditions for the movement of these vehicles.Discussion and conclusions. The use of this modelling method will increase the speed of the study and help to determine most clearly how traffic flow characteristics change in the situations presented.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47049496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methodology for information and technologigy assessment of public passenger transport work","authors":"A. A. Guskov, N. Y. Zalukaeva, M. Sevostyanov","doi":"10.26518/2071-7296-2022-19-5-654-665","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-654-665","url":null,"abstract":"Introduction. The problems of the organisation of urban passenger transportation are considered. The reasons for the inefficient operation of public transport in the cities of Russia and abroad, as well as the factors contributing to this, are investigated. The insufficient level of information technology systems and technologies use in the transportation process is indicated. The purpose of the work is to develop a refined methodology for evaluating the efficiency of public passenger transport based on the criteria of the information technology indicator, as well as to test the evaluation of the efficiency of motor transport enterprises engaged in passengers transportation in Tambov according to this indicator.Materials and methods. A refined methodology for evaluating the efficiency of public passenger transport has been developed based on the criteria of the information technology indicator. Each criterion was assigned a weighting indicator (coefficient), depending on the significance and impact on the efficiency and safety of public passenger transport.Results. The study of the efficiency of public passenger transport in Tambov according to the criteria of information technology assessment showed that, in general, the level of equipment is lower than the average estimated indicator - from 5.55 to 8.3 points. This indicates the insufficient equipment of carriers with information technologies and systems.Discussion and conclusion. The measures to improve the efficiency of public passenger transport are proposed.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41757094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement of organisation for road transport functioning in a multimodal logistics system for grain delivary from Volgograd region to Iran","authors":"A. Kulikov, E. Bliznyakova, P. Pavlov, A. Kulikov","doi":"10.26518/2071-7296-2022-19-5-692-715","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-692-715","url":null,"abstract":"Introduction. The paper has developed a new scheme of a multimodal logistics system for grain transportation for export to Iran using links and graphs. It is proposed to consider the functioning of road transport in a multimodal logistics system for grain export from the standpoint of a systematic approach at the micro, meso and macro levels based on the newly introduced concept of transport capacity of the simulated graph. To determine the optimal modes of road transport functioning (with the further aim of increasing its efficiency of functioning) in the logistics links of export grain supplies at the micro level, it is proposed to perform using the ‘Sowing fields – regional barn-floors’ graph, at the meso level – the ‘Regional barn-floors – regional grain storages’ graph, at the macro level – the ‘Regional grain storages – port grain storages’ graph. Graphs modelling, determining the transport capacity of vertices, fixing vertices for barn-floors, regional grain storages and port grain storages make it possible for agro–industrial enterprises to plan the volume of grain exports, to use their acreage rationally considering crop yields while fulfilling an important condition - ensuring food security for the population of the Russian Federation. Road transport planning at the micro level is directly linked to the operation of agricultural enterprises, and at the meso level to grain storages. At the macro level, road transport serves the three largest port grain receiving points of the Volgograd region. Multimodal transportation of grain from a specific farm in the region to the port of Enzeli in Iran has been organized using road transport and VOLGO-BALT 239 river-sea vessel.Materials and methods. The paper uses methods of statistical analysis of winter wheat supplies for export to Iran from the Volgograd region. At the micro level, graphoanalytic methods are used to model the location schemes of filling bunkers when working in a team of one, three or nine combines, indicating their number of appearance on the field in the xOy coordinate plane. The methods of system analysis were used to correctly divide the international multimodal logistics system for the transportation of export grain into micro, meso and macro levels with the definition of the place and role of transport. Methods of solving the linear programming problem are the optimization of the assignment of consumers to suppliers at all levels under consideration.Results. It is revealed that complex international multimodal logistics systems for the delivery of export grain must be considered using a systematic approach. It is proposed to consider the system at the micro, meso and macro levels. At each of the levels, it is necessary to plan the operation of transport based on calculations of the ‘transport capacity’ of the ‘Sowing fields – regional barn-floors’, ‘Regional barn-floors – regional grain storages’, ‘Regional grain storages – port grain storages’ graph nodes. OOO Progress, th","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49343967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contamination of engine oils during winter vehicle operation","authors":"S. Korneev, S. V. Pashukevich, V. Bakulina, N. Pevnev","doi":"10.26518/2071-7296-2022-19-5-680-691","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-680-691","url":null,"abstract":"Introduction. The reliability and service life of an engine is largely dependent on the quality of the engine oil. Without oil at the proper level of performance, an internal combustion engine can suffer from wear and tear, which in many cases can lead to engine failure. One of the factors in the loss of the quality level of engine oil is its contamination. For example, kinematic viscosity will gradually increase as the engine oil becomes contaminated with soot, dirt and sludge; or it may be oxidized. If the viscosity of the engine oil is too high, the engine must do extra work to overcome the increased viscosity resistance.Fuel and water dilution is one of the most common contaminants in diesel engines.Materials and Methods. The paper presents the results of a study of the combined effect of water and diesel fuel on synthetic engine oil at their various concentrations. The influence evaluation of contaminants on changes in the performance characteristics of the lubricant, such as: kinematic viscosity at 40° C (measurement was carried out on an automatic Stabinger SVM 3000 viscometer), base and acid numbers (values obtained using an automatic Titroline Alpha 20 Plus titrator), as well as concentration measurement elements - indicators of engine oil on an optical emission spectrometer with inductively coupled plasma of the iCAP 7000 series.Conclusions. The presence of contaminants in the engine oil leads to an increase in kinematic viscosity, during the operation of the engine oil, the value of its base number becomes less, and the value of the acid, on the contrary, increases. It is necessary to replace engine oils when the base number decreases by 50% or according to the balance of base and acid numbers.Scope of Study/Opportunity. This type of low temperature performance modelling provides insight into how the oil deteriorates and evaluates the change in oil performance during use.Originality/value. The study can be the basis for developing recommendations for improving the maintenance of internal combustion engines for enterprises that have cars with diesel engines at their disposal in order to increase the resource of power units and reduce operating costs.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47508806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interaction of vibroimpact lattice and screen sieve in anti-phase oscillation mode","authors":"V. Sizikov, S. Sizikov","doi":"10.26518/2071-7296-2022-19-5-624-636","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-624-636","url":null,"abstract":"Introduction. One of basic technological operations in construction technology is a process of classification of fine grained mineral materials, for example, natural sand. The related actual problem is connected with increasing performance and effectiveness of screening of sand medium, in particular reducing the contamination of screening surface of vibrating screens from seal particles and sticking in sieve holes wedge-shaped grains. The solution of this problem concludes in performing by the use of vibroimpact screens of various operating principle. One of innovative vibroimpact screen constructions is a screen with vibroimpact lattice, mounted under sieve with a gap on spring elements, which provides an impulse impact on all sieve surface area. Such construction provides increasing the effectiveness of sieve cleaning due to the transfer to sieve impact impulse in each screen oscillation period and reducing its excessive damage and abrasion by increasing the area of vibroimpact lattice and sieve interaction. The purpose of the work is to determinate functional relationships of dynamical interaction between elements of three-mass vibroimpact ‘screen body – vibroimpact lattice – sieve’ system for providing the necessary value of impact impulse transferred to sieve in relation to screen body oscillation frequency and amount of gap between lattice and sieve.Materials and methods. The research is based on a method of mathematical modelling. On the first stage the research is being conducted with using two-mass ‘screen body – vibroimpact lattice’ model without consideration the impact between lattice and sieve for determination the oscillation frequency range of in-phase oscillation regime and gap values providing an impact between lattice and sieve. For the calculation of displacement of screen elements and for research the relationships of its parameters in selected range the three-mass model of vibroimpact model of screen with one impact pair is used on a second stage of research.Results. As a result of calculation obtained the functional relationships of correlation of the gap between vibroimpact lattice and screen sieve and oscillation frequency on the impact impulse transferred to sieve and sieve double amplitude were obtained. The developed recommendations for practical using of obtained relationships for adjustment operating regimes of vibroimpact screen which allow to establish the screen operating oscillation frequency and value of gap between lattice and sieve for providing high effectiveness of sieve holes cleaning from contaminating particles.Discussion and Conclusions. Performed mathematical modelling allowed to obtain dependencies of influence of gap between sieve and vibroimpact lattice and screen elements oscillation frequency on impulse transferred on screen sieve and sieve double amplitude. Developed practical recommendations of obtained dependencies allow to perform an effective adjustment of vibroimpact screen operating regimes a","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42524324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical model of the snow mass transportation process in the snowblower rotor","authors":"D. Aleshkov, P. Korchagin, I. Teterina","doi":"10.26518/2071-7296-2022-19-5-610-623","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-610-623","url":null,"abstract":"Introduction. The complexity and laboriousness of determining the functional dependencies between the structural elements of a rotary snowplow and the developed snow mass when conducting experimental studies on a physical model of a rotary snowplow necessitates the development of mathematical models that make it possible to describe as accurately as possible the processes of interaction between the elements of a rotary snowplow and snow mass. The method of research. A mathematical model of the process of transporting snow mass in a rotor, in which snow is represented as a loose medium, including a set of individual particles, was developed using the method of discrete elements. When constructing a mathematical model, the problems of identifying mass and surface forces acting in the ‘rotor - snow mass’ system were solved. The principle of the location of a group of particles in the interblade space of the snowplow rotor and the choice of the method for analyzing the mathematical model are substantiated.Results. The implementation of this mathematical model on a computer made it possible to obtain the numerical values of the forces of the normal reaction of the rotor casing at each moment of time, which allows developing new and improving existing design schemes, reasonably choosing the design and technological parameters of the rotor of a snow blower.Discussion and conclusion. The proposed mathematical model and the equations of motion, compiled on its basis, make it possible to unambiguously determine the values of all forces acting on the snow mass during its transportation in the rotor of a rotary snowplow. The model under consideration makes it possible to simulate a snow mass in the interblade space of a more complex configuration and a set of particles that have an irregular distribution in size and relative position.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46114567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of regularities in transport preferences by analysis of transport survey results","authors":"S. Azemsha, V. M. Marozau","doi":"10.26518/2071-7296-2022-19-5-638-653","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-5-638-653","url":null,"abstract":"Introduction. Transport in cities has a huge impact on the environment, the quality of life of people, their health, road safety, etc., which is the subject of a fairly large number of scientific publications. It is obvious that measures aimed at shifting transport demand from a private car towards the use of public transport are extremely relevant. One way to develop such measures could be through a survey of users of transport services.This article reveals patterns in the transport preferences of the inhabitants of the city of Gomel by analysing the results of their transport survey.The purpose of the work is to obtain data on the transport preferences of the inhabitants of the city of Gomel. Materials and methods. When writing the article, materials obtained during the transport survey of residents of the city of Gomel were used. At the same time, graphical analysis methods, crosstabulation tables, Chi-square test (when comparing differences in independent samples of nominal variables), analysis of variance (when comparing differences in independent samples of nominal and numerical variables, depending on the law distributions within groups) implemented in a specialised software product.Results. Based on the results of the article, information was obtained about the transport preferences of the inhabitants of the city of Gomel.Discussion and conclusion. The obtained results of the analysis of the transport survey are the basis for the subsequent justification of measures aimed at shifting transport demand from individual cars towards the use of regular public transport.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46903911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}