Pub Date : 2023-11-12DOI: 10.26518/2071-7296-2023-20-5-586-599
S. V. Dorokhin, A. Yu. Artemov
For the majority of cities with an established transport system, certain intensity fluctuations are characteristic, which are cyclical and repeated during a day, day and night and week. Taking into account the available equipment, executive elements of the first layer of intelligent transportation systems (ITS), it is possible to promptly assess the transportation situation and change the mode of control in the on-line format, but this kind of technology is mainly presented in large cities. In spite of the fact that in cities with a small population, belonging to the category of small and medium-sized cities there are identical problems in the field of coordinated management of main streets, on such sections there is no possibility of operational change of management, due to the lack of special equipment and implementation of constant monitoring and control of the traffic situation. In order to improve the efficiency of management in such sections located in small and medium-sized cities, it is necessary to develop a way to evaluate the effectiveness of coordinated management, which is the main purpose of the study. Methods and materials. As a result of the performed research, methods of field observations, calculation methods and modelling methods were used. Results. As part of the completed study, a method to evaluate the effectiveness of the coordinated type of control based on a comparison of the average intensity of the adjacent and mainline section and their corresponding average delay values was developed. Conclusion. The use of the obtained results on the research object made possible to establish time periods of application of coordination and rigid non-coordinated control.
{"title":"Efficiency evaluating method for coordinated control type on main street","authors":"S. V. Dorokhin, A. Yu. Artemov","doi":"10.26518/2071-7296-2023-20-5-586-599","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-586-599","url":null,"abstract":"For the majority of cities with an established transport system, certain intensity fluctuations are characteristic, which are cyclical and repeated during a day, day and night and week. Taking into account the available equipment, executive elements of the first layer of intelligent transportation systems (ITS), it is possible to promptly assess the transportation situation and change the mode of control in the on-line format, but this kind of technology is mainly presented in large cities. In spite of the fact that in cities with a small population, belonging to the category of small and medium-sized cities there are identical problems in the field of coordinated management of main streets, on such sections there is no possibility of operational change of management, due to the lack of special equipment and implementation of constant monitoring and control of the traffic situation. In order to improve the efficiency of management in such sections located in small and medium-sized cities, it is necessary to develop a way to evaluate the effectiveness of coordinated management, which is the main purpose of the study. Methods and materials. As a result of the performed research, methods of field observations, calculation methods and modelling methods were used. Results. As part of the completed study, a method to evaluate the effectiveness of the coordinated type of control based on a comparison of the average intensity of the adjacent and mainline section and their corresponding average delay values was developed. Conclusion. The use of the obtained results on the research object made possible to establish time periods of application of coordination and rigid non-coordinated control.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037671","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}
Pub Date : 2023-11-12DOI: 10.26518/2071-7296-2023-20-5-574-585
N. K. Goryaev, S. P. Lyubetskii
Introduction. An urgent task for any municipality is the development of an Integrated Traffic Management Scheme, which is based on an analysis of the current situation. At the same time, the most important element is the analysis of road traffic accidents (RTA). The purpose of this study is to develop a methodology for accumulating, processing and analyzing the data on road accidents from the main official source - the State Inspectorate for Road Safety (GIBDD). Description of the problem. The data can be uploaded from the traffic police portal in two formats, but none of them allows for automated analysis of road accidents and presentation of its results using geographic information systems (GIS). Proposed methodology. The paper proposes a methodology for analyzing traffic accidents, including the following steps: uploading data from the site, converting data into convenient formats, entering data into a geographic information system, analyzing data using geographic information systems. Methodology approbation. Using the proposed methodology, an analysis of traffic accidents in the Cheboksary agglomeration was made and its visualization was made using GIS. Conclusions. The use of information about road accidents in the formats offered on the traffic police website is impossible either for analysis or for visualization in a GIS. The proposed method for accumulating, processing and analyzing accidents based on data from an official source using GIS makes it possible to automate the process and improve the quality of accident analysis.
{"title":"Open data on road traffic accidents accumulation, processing and analysis","authors":"N. K. Goryaev, S. P. Lyubetskii","doi":"10.26518/2071-7296-2023-20-5-574-585","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-574-585","url":null,"abstract":"Introduction. An urgent task for any municipality is the development of an Integrated Traffic Management Scheme, which is based on an analysis of the current situation. At the same time, the most important element is the analysis of road traffic accidents (RTA). The purpose of this study is to develop a methodology for accumulating, processing and analyzing the data on road accidents from the main official source - the State Inspectorate for Road Safety (GIBDD). Description of the problem. The data can be uploaded from the traffic police portal in two formats, but none of them allows for automated analysis of road accidents and presentation of its results using geographic information systems (GIS). Proposed methodology. The paper proposes a methodology for analyzing traffic accidents, including the following steps: uploading data from the site, converting data into convenient formats, entering data into a geographic information system, analyzing data using geographic information systems. Methodology approbation. Using the proposed methodology, an analysis of traffic accidents in the Cheboksary agglomeration was made and its visualization was made using GIS. Conclusions. The use of information about road accidents in the formats offered on the traffic police website is impossible either for analysis or for visualization in a GIS. The proposed method for accumulating, processing and analyzing accidents based on data from an official source using GIS makes it possible to automate the process and improve the quality of accident analysis.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135036919","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}
Pub Date : 2023-11-12DOI: 10.26518/2071-7296-2023-20-5-600-617
N. M. Karimov, A. Yu. Mikhailov
Introduction . In recent years a number of methodological and regulatory documents have been developed for public road roundabouts in the Russian Federation. In particular it was proposed to evaluate the quality of traffic management at roundabouts by the level of service measured by the average delay at roundabout entrances. The extension of the average delay criterion to the design of roundabouts requires the development of a methodology for estimating the capacity of traffic lanes at multi-lane roundabout entrances. The aim of the study . Is to develop a methodology for estimating the capacity of multi-lane roundabouts. The object of the study . Is the functioning of multilane roundabouts. Subject of the research. Are the regularities of influence of traffic volume on the values of characteristics of transport streams interaction in the conflict points of multilane roundabouts. Theoretical foundations of the research. The model for estimation of carrying capacity of multilane roundabouts based on the use of conflict points and function of acceptance of intervals is offered. Research Methodology. The video footage of multi-lane roundabouts in the cities of Bratsk, Vladivostok, Irkutsk, Lipetsk, Nakhodka, Orenburg, Petrozavodsk and Pskov was processed. On each lane of the circular carriageway, intervals in the flow, measured between the front bumpers of vehicles, were recorded. The accepted and rejected headways were registered, as well as the number of vehicles using accepted intervals. The determination of the values of critical headways and follow-up time was performed using the Siegloch’s method based on linear regression. Results. A model for estimating capacity at the entrance to a multi-lane roundabout was validated. The values of critical intervals, queuing intervals of each of the entrance lanes to 2-lane and 3-lane roundabouts were determined. The values of the minimum headways in the flows moving on the circular carriageway are determined, also the dependences of the influence of traffic intensity on the free share of the traffic flow are established.
{"title":"Developing a method of multi-lane roundabouts capacity","authors":"N. M. Karimov, A. Yu. Mikhailov","doi":"10.26518/2071-7296-2023-20-5-600-617","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-600-617","url":null,"abstract":"Introduction . In recent years a number of methodological and regulatory documents have been developed for public road roundabouts in the Russian Federation. In particular it was proposed to evaluate the quality of traffic management at roundabouts by the level of service measured by the average delay at roundabout entrances. The extension of the average delay criterion to the design of roundabouts requires the development of a methodology for estimating the capacity of traffic lanes at multi-lane roundabout entrances. The aim of the study . Is to develop a methodology for estimating the capacity of multi-lane roundabouts. The object of the study . Is the functioning of multilane roundabouts. Subject of the research. Are the regularities of influence of traffic volume on the values of characteristics of transport streams interaction in the conflict points of multilane roundabouts. Theoretical foundations of the research. The model for estimation of carrying capacity of multilane roundabouts based on the use of conflict points and function of acceptance of intervals is offered. Research Methodology. The video footage of multi-lane roundabouts in the cities of Bratsk, Vladivostok, Irkutsk, Lipetsk, Nakhodka, Orenburg, Petrozavodsk and Pskov was processed. On each lane of the circular carriageway, intervals in the flow, measured between the front bumpers of vehicles, were recorded. The accepted and rejected headways were registered, as well as the number of vehicles using accepted intervals. The determination of the values of critical headways and follow-up time was performed using the Siegloch’s method based on linear regression. Results. A model for estimating capacity at the entrance to a multi-lane roundabout was validated. The values of critical intervals, queuing intervals of each of the entrance lanes to 2-lane and 3-lane roundabouts were determined. The values of the minimum headways in the flows moving on the circular carriageway are determined, also the dependences of the influence of traffic intensity on the free share of the traffic flow are established.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135036785","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}
Pub Date : 2023-11-12DOI: 10.26518/2071-7296-2023-20-5-632-648
A. I. Fadeev, A. M. Ilyankov
Introduction. Intercity public transport ensures the satisfaction of mobility not only for long-distance passengers, but also for residents of small settlements located on a regular line. There are often no other types of regular public transport between such settlements. The growing demand for intercity bus transportation increases the need for efficient transportation design in order to provide competitive public transport services and minimize the costs of carriers. Materials and methods . The article presents a mathematical model of transportation planning on an intercity regular bus line passing through settlements with different numbers of inhabitants. The objective function is aimed at forming a transport supply that satisfies potential demand, for which the gravitational method is used to determine. The analysis of the unevenness of passenger flows by months of the year, days of the week and flights shows that on most flights the capacity of the rolling stock is not used efficiently enough. Results. By comparing the potential number of passengers on flights with the actual one, it is shown that flexible regulation of transport supply taking into account demand will significantly improve the quality and efficiency of public transport services. Discussion and conclusion. Based on the data for 2022 of the booking system serving the regular bus line, it is shown that with the introduction of flexible regulation of the transport offer, the expected increase in passenger turnover will be about 25%.
{"title":"Transport supply management on regular intercity bus lines","authors":"A. I. Fadeev, A. M. Ilyankov","doi":"10.26518/2071-7296-2023-20-5-632-648","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-632-648","url":null,"abstract":"Introduction. Intercity public transport ensures the satisfaction of mobility not only for long-distance passengers, but also for residents of small settlements located on a regular line. There are often no other types of regular public transport between such settlements. The growing demand for intercity bus transportation increases the need for efficient transportation design in order to provide competitive public transport services and minimize the costs of carriers. Materials and methods . The article presents a mathematical model of transportation planning on an intercity regular bus line passing through settlements with different numbers of inhabitants. The objective function is aimed at forming a transport supply that satisfies potential demand, for which the gravitational method is used to determine. The analysis of the unevenness of passenger flows by months of the year, days of the week and flights shows that on most flights the capacity of the rolling stock is not used efficiently enough. Results. By comparing the potential number of passengers on flights with the actual one, it is shown that flexible regulation of transport supply taking into account demand will significantly improve the quality and efficiency of public transport services. Discussion and conclusion. Based on the data for 2022 of the booking system serving the regular bus line, it is shown that with the introduction of flexible regulation of the transport offer, the expected increase in passenger turnover will be about 25%.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135036917","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}
Pub Date : 2023-11-12DOI: 10.26518/2071-7296-2023-20-5-618-631
A. I. Nedobitkov, V. S. Yakovlev
Introduction. Forensic fire and technical examination of a car is of high demand, and at the same time it is one of the most complicated examinations, because of its complicated nature and need in involvement of experts of various specialties. The design of automobiles and their components is continually improving. In this connection the methodological base of fire and technical examination should be duly adapted to present-day requirement. The safety requirements for prevention of fuel ignitions in a motor cabinet of a car have been analyzed during the research. Materials and Methods. Under the conditions of an accredited laboratory specializing in testing automobile fuels and oils, we have carried out the experiments in ignition of K4-class petrol being fed in drops and stream-like fed on a hot surface. We have also undertaken the experimental studies in order to find out an actual temperature of elements of engine exhaust systems of М1 and М1G automobiles of various models under the actual operating conditions. A thermal imaging camera and a thermocouple have been used to measure the surface temperature of the engine exhaust system parts. An elemental composition of a film formed on a hot steel surface upon contact with petrol has been determined with the use of a scanning electron microscope Results. We have received the actual results on the temperature of the elements of light car exhaust systems under the various operating conditions. There are the results of experiments on the discharge of the petrol in the form of drops and stream on a hot surface presented in the article. An elemental composition of a film formed on a hot steel surface upon contact with petrol has been analyzed, and secondariness of film formation towards the fire cause has been proved. Conclusion. The results of the research could be used in the conduct of fire and technical examination of vehicles of М1 and М1G categories, what could increase reliability and validity of its conclusions.
{"title":"On possible petrol ignition on М<sub>1</sub>, М<sub>1</sub>G car catalyst converters surface","authors":"A. I. Nedobitkov, V. S. Yakovlev","doi":"10.26518/2071-7296-2023-20-5-618-631","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-618-631","url":null,"abstract":"Introduction. Forensic fire and technical examination of a car is of high demand, and at the same time it is one of the most complicated examinations, because of its complicated nature and need in involvement of experts of various specialties. The design of automobiles and their components is continually improving. In this connection the methodological base of fire and technical examination should be duly adapted to present-day requirement. The safety requirements for prevention of fuel ignitions in a motor cabinet of a car have been analyzed during the research. Materials and Methods. Under the conditions of an accredited laboratory specializing in testing automobile fuels and oils, we have carried out the experiments in ignition of K4-class petrol being fed in drops and stream-like fed on a hot surface. We have also undertaken the experimental studies in order to find out an actual temperature of elements of engine exhaust systems of М1 and М1G automobiles of various models under the actual operating conditions. A thermal imaging camera and a thermocouple have been used to measure the surface temperature of the engine exhaust system parts. An elemental composition of a film formed on a hot steel surface upon contact with petrol has been determined with the use of a scanning electron microscope Results. We have received the actual results on the temperature of the elements of light car exhaust systems under the various operating conditions. There are the results of experiments on the discharge of the petrol in the form of drops and stream on a hot surface presented in the article. An elemental composition of a film formed on a hot steel surface upon contact with petrol has been analyzed, and secondariness of film formation towards the fire cause has been proved. Conclusion. The results of the research could be used in the conduct of fire and technical examination of vehicles of М1 and М1G categories, what could increase reliability and validity of its conclusions.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037791","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}
Pub Date : 2023-11-11DOI: 10.26518/2071-7296-2023-20-5-560-572
S. V. Kozeletov, S. V. Saveliev
Introduction. Modern technologies, as well as various methods and schemes currently used in technology, have made it possible to automatically control the damping properties of shock absorbers, which increases the energy intensity of the entire suspension system. However, in order to use these solutions in practice, it is necessary to develop mathematical models of these damping elements. Such models serve as a theoretical tool for studying the described processes in order to implement the correct control action. As for such units as controlled (adjustable) vane shock absorbers, the studies carried out earlier on them are clearly not enough to ensure their effective operation in various conditions. The object of this study is a controlled vane hydraulic shock absorber. The purpose of this work is to carry out theoretical studies and improve the methodology for calculating controlled (adjustable) bladed hydraulic shock absorbers, in which magnetorheological fluid is used as the working fluid of the shock absorber. Research methods. The design and principle of operation of controlled vane hydraulic shock absorber with magnetorheological (MR) throttles are considered. Method of calculation is proposed and theoretical studies are performed on influence of change of volume flow rate of working medium of shock absorber in MR throttle on forces of resistance to rotation on shaft of shock absorber blade. The results of theoretical research . 1) Results of theoretical studies of change of volume flow rate of working medium of controlled hydraulic blade shock absorber are presented. 2) An adequate mathematical model is obtained that is suitable for calculating the characteristics of controlled (adjustable) hydraulic vane shock absorbers, where magnetorheological fluid is used as the working medium of the shock absorber, as well as for selecting control action in the control system. Conclusion. The results of the study are intended for organizations and enterprises engaged in the development and production of heavy high-speed tracked vehicles. The results of the studies can be used to refine the methodology for estimating the smoothness of the heavy high-speed tracked vehicles.
{"title":"Mathematical model of controlled vane hydraulic shock absorber","authors":"S. V. Kozeletov, S. V. Saveliev","doi":"10.26518/2071-7296-2023-20-5-560-572","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-560-572","url":null,"abstract":"Introduction. Modern technologies, as well as various methods and schemes currently used in technology, have made it possible to automatically control the damping properties of shock absorbers, which increases the energy intensity of the entire suspension system. However, in order to use these solutions in practice, it is necessary to develop mathematical models of these damping elements. Such models serve as a theoretical tool for studying the described processes in order to implement the correct control action. As for such units as controlled (adjustable) vane shock absorbers, the studies carried out earlier on them are clearly not enough to ensure their effective operation in various conditions. The object of this study is a controlled vane hydraulic shock absorber. The purpose of this work is to carry out theoretical studies and improve the methodology for calculating controlled (adjustable) bladed hydraulic shock absorbers, in which magnetorheological fluid is used as the working fluid of the shock absorber. Research methods. The design and principle of operation of controlled vane hydraulic shock absorber with magnetorheological (MR) throttles are considered. Method of calculation is proposed and theoretical studies are performed on influence of change of volume flow rate of working medium of shock absorber in MR throttle on forces of resistance to rotation on shaft of shock absorber blade. The results of theoretical research . 1) Results of theoretical studies of change of volume flow rate of working medium of controlled hydraulic blade shock absorber are presented. 2) An adequate mathematical model is obtained that is suitable for calculating the characteristics of controlled (adjustable) hydraulic vane shock absorbers, where magnetorheological fluid is used as the working medium of the shock absorber, as well as for selecting control action in the control system. Conclusion. The results of the study are intended for organizations and enterprises engaged in the development and production of heavy high-speed tracked vehicles. The results of the studies can be used to refine the methodology for estimating the smoothness of the heavy high-speed tracked vehicles.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135086636","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}
Pub Date : 2023-11-11DOI: 10.26518/2071-7296-2023-20-5-650-669
A. S. Aleksandrov, T. V. Semenova, D. Yu. Raskoshny
Introduction. The intensification of the motorization of the Russian population has led to a significant increase in the number of passenger cars, which in many regions are supplied with studded tires for the winter period. This circumstance led to the large-scale appearance of a certain type of ruts caused by the wear of asphalt concrete pavement from the action of studded tires and abrasive materials used to combat winter slipperiness. The track formed on the surface of road surfaces has a complex character and includes three types of tracks: structural, shear track and wear track. The contribution of each type of track to the total depth of the complex track is different and depends on the characteristics of transport loads, the properties of the coating material, and weather and climatic factors. Materials and methods. The wear track is formed in winter from the impact of studded tires, and its depth is affected by many factors: the mode and intensity of movement of cars with studded tires, the type of spikes, their number on the tire, the size of the protrusion of the working insert of the spike, the properties of asphalt concrete pavement, weather and climatic factors, as well as winter road maintenance measures. On curves of a small radius, braking or acceleration sections, as well as sections with a normal mode of movement of cars, the horizontal loads from the studded tire are different. This is due to the occurrence of various types of friction, as well as the dependence of the coefficient of adhesion of the coated tire on the speed of movement, which is variable in the braking and acceleration sections. As a result, in certain areas, the contribution of wear to the depth of the complex track is greater than in areas with a different driving mode. In the article, a study was conducted to determine the susceptibility of road sections with different traffic modes to the formation of wear ruts. A method has been developed for calculating various components of the complex trackage caused by compaction and wear of the asphalt concrete coating, as well as deformations of the underlying layers of the pavement and the roadbed. Result. Based on the data of experiments carried out on the roads of Omsk, a classification of sections according to the degree of danger to the formation of a wear track is proposed, dividing sections of urban roads into heavily worn, worn and weakly worn. Based on the analysis of data from road diagnostics performed over the past five years, the approximate service life of the coatings until the formation of a 30 mm deep track has been determined. Discussion and conclusion. The authors’ ideas about the influence of friction and the speed of movement on the process of track formation caused by wear are presented. The correspondence of the experimental data obtained by the authors of the article with the data of colleagues who performed similar studies in Russia and abroad is shown. Clarifications introduced by the author
{"title":"Classification of road sections according to the degree of danger to the formation of a wear track","authors":"A. S. Aleksandrov, T. V. Semenova, D. Yu. Raskoshny","doi":"10.26518/2071-7296-2023-20-5-650-669","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-650-669","url":null,"abstract":"Introduction. The intensification of the motorization of the Russian population has led to a significant increase in the number of passenger cars, which in many regions are supplied with studded tires for the winter period. This circumstance led to the large-scale appearance of a certain type of ruts caused by the wear of asphalt concrete pavement from the action of studded tires and abrasive materials used to combat winter slipperiness. The track formed on the surface of road surfaces has a complex character and includes three types of tracks: structural, shear track and wear track. The contribution of each type of track to the total depth of the complex track is different and depends on the characteristics of transport loads, the properties of the coating material, and weather and climatic factors. Materials and methods. The wear track is formed in winter from the impact of studded tires, and its depth is affected by many factors: the mode and intensity of movement of cars with studded tires, the type of spikes, their number on the tire, the size of the protrusion of the working insert of the spike, the properties of asphalt concrete pavement, weather and climatic factors, as well as winter road maintenance measures. On curves of a small radius, braking or acceleration sections, as well as sections with a normal mode of movement of cars, the horizontal loads from the studded tire are different. This is due to the occurrence of various types of friction, as well as the dependence of the coefficient of adhesion of the coated tire on the speed of movement, which is variable in the braking and acceleration sections. As a result, in certain areas, the contribution of wear to the depth of the complex track is greater than in areas with a different driving mode. In the article, a study was conducted to determine the susceptibility of road sections with different traffic modes to the formation of wear ruts. A method has been developed for calculating various components of the complex trackage caused by compaction and wear of the asphalt concrete coating, as well as deformations of the underlying layers of the pavement and the roadbed. Result. Based on the data of experiments carried out on the roads of Omsk, a classification of sections according to the degree of danger to the formation of a wear track is proposed, dividing sections of urban roads into heavily worn, worn and weakly worn. Based on the analysis of data from road diagnostics performed over the past five years, the approximate service life of the coatings until the formation of a 30 mm deep track has been determined. Discussion and conclusion. The authors’ ideas about the influence of friction and the speed of movement on the process of track formation caused by wear are presented. The correspondence of the experimental data obtained by the authors of the article with the data of colleagues who performed similar studies in Russia and abroad is shown. Clarifications introduced by the author","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135086773","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}
Pub Date : 2023-11-11DOI: 10.26518/2071-7296-2023-20-548-559
V. A. Nikolayev
Introduction. The problem of accelerating and reducing the cost of road construction without reducing their quality can be solved by creating a complex of continuous units. The units, following each other, carry out the whole range of works aimed at the construction of roads. One of the elements of the continuous unit that forms the cuvette is a direct-flow rotary ripper. It was revealed that for excavation near the axis of rotation of the rotor of a direct-flow rotary ripper, a small rotor with a higher angular velocity coaxially with a large rotor should be installed. The small rotor contains of a small rotor tip with spiral knives, two teeth and two knives. Previously, the structural layout of the small rotor was determined, the height of the spiral of the spiral knife was calculated. By analyzing the interaction of the elements of the working bodies of the direct-flow rotary ripper with the soil, it is necessary to identify the power on the drive of the tip of the small rotor. The method of research . The calculation methods of power for the introduction of a cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground, power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife have been developed. Results. On the basis of the developed methods, the parameters were calculated. From the spatial models of the forces of interaction with the soil of the spiral knife, their resultant, normal forces, the forces of resistance of the soil to the rotation of the spiral knife are revealed, the friction forces of the soil on the rear surfaces of the first and second turns of the spiral knife are calculated. The total power for the drive of the tip of the small rotor and the volumetric energy for the introduction of a cone with a spiral knife into the ground are calculated. Conclusion . The total power for the drive of the tip of the small rotor includes power for the introduction of the cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground; power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife. The required power to drive the tip of the small rotor is 1127 W. The volumetric energy for the introduction of a cone with a spiral knife into the ground is 16.9 kJ / cubic meter.
{"title":"Required power calculation to small rotor tip drive","authors":"V. A. Nikolayev","doi":"10.26518/2071-7296-2023-20-548-559","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-548-559","url":null,"abstract":"Introduction. The problem of accelerating and reducing the cost of road construction without reducing their quality can be solved by creating a complex of continuous units. The units, following each other, carry out the whole range of works aimed at the construction of roads. One of the elements of the continuous unit that forms the cuvette is a direct-flow rotary ripper. It was revealed that for excavation near the axis of rotation of the rotor of a direct-flow rotary ripper, a small rotor with a higher angular velocity coaxially with a large rotor should be installed. The small rotor contains of a small rotor tip with spiral knives, two teeth and two knives. Previously, the structural layout of the small rotor was determined, the height of the spiral of the spiral knife was calculated. By analyzing the interaction of the elements of the working bodies of the direct-flow rotary ripper with the soil, it is necessary to identify the power on the drive of the tip of the small rotor. The method of research . The calculation methods of power for the introduction of a cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground, power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife have been developed. Results. On the basis of the developed methods, the parameters were calculated. From the spatial models of the forces of interaction with the soil of the spiral knife, their resultant, normal forces, the forces of resistance of the soil to the rotation of the spiral knife are revealed, the friction forces of the soil on the rear surfaces of the first and second turns of the spiral knife are calculated. The total power for the drive of the tip of the small rotor and the volumetric energy for the introduction of a cone with a spiral knife into the ground are calculated. Conclusion . The total power for the drive of the tip of the small rotor includes power for the introduction of the cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground; power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife. The required power to drive the tip of the small rotor is 1127 W. The volumetric energy for the introduction of a cone with a spiral knife into the ground is 16.9 kJ / cubic meter.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135086914","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}
Pub Date : 2023-11-11DOI: 10.26518/2071-7296-2023-20-5-670-682
Ahmed Abdul Ruda Awda Al-Msari, A. A. Rudenko
Introduction. The construction of capital construction facilities is a complex organizational and technological task, providing for the execution of a complex of construction and installation works, as well as organizational and technological interaction of all construction participants, including with the aim of prompt management of risks arising during construction with varying degrees of intensity and danger. Materials and methods. One of the main conditions for ensuring organizational and technological reliability in the construction industry is the full and timely provision of all types of resources, which at the current stage is not always an effectively solved scientific and practical task, due to the high level of various risks. Results. The results of the adverse consequences of the risks have a very negative and significant impact on such construction issues as compliance with the deadlines for the work, optimization of the cost of the facility at all stages of its construction, ensuring the specified quality of construction and installation. In this regard, ensuring organizational and technological reliability (OTR) of construction based on an effective resource support system, taking into account risks, is an urgent and important task. Discussion and conclusion. Consideration of the impact of construction resource supply factors is important for taking into account the risk and its consequences, as a quantitative measure to assess the negative or favorable scenario of construction progress. Assessment of various factors of resource supply will make it possible to more accurately assess the organizational and technological reliability of construction.
{"title":"Organizational and technological reliability of construction in Iraq","authors":"Ahmed Abdul Ruda Awda Al-Msari, A. A. Rudenko","doi":"10.26518/2071-7296-2023-20-5-670-682","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-670-682","url":null,"abstract":"Introduction. The construction of capital construction facilities is a complex organizational and technological task, providing for the execution of a complex of construction and installation works, as well as organizational and technological interaction of all construction participants, including with the aim of prompt management of risks arising during construction with varying degrees of intensity and danger. Materials and methods. One of the main conditions for ensuring organizational and technological reliability in the construction industry is the full and timely provision of all types of resources, which at the current stage is not always an effectively solved scientific and practical task, due to the high level of various risks. Results. The results of the adverse consequences of the risks have a very negative and significant impact on such construction issues as compliance with the deadlines for the work, optimization of the cost of the facility at all stages of its construction, ensuring the specified quality of construction and installation. In this regard, ensuring organizational and technological reliability (OTR) of construction based on an effective resource support system, taking into account risks, is an urgent and important task. Discussion and conclusion. Consideration of the impact of construction resource supply factors is important for taking into account the risk and its consequences, as a quantitative measure to assess the negative or favorable scenario of construction progress. Assessment of various factors of resource supply will make it possible to more accurately assess the organizational and technological reliability of construction.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135087050","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}
Pub Date : 2023-11-11DOI: 10.26518/2071-7296-2023-20-5-540-547
V. G. Zedgenizov, S. Kh. Faizov
Introduction. Increasing the energy efficiency of vibration technology poses a number of challenges for its developers. A promising direction for reducing energy costs for driving vibration machines is the use of the resonance phenomenon. Due to the dynamic properties of the oscillatory system, it is possible to significantly reduce the power consumption of resonant vibration equipment, and in some cases, improve the quality of the products. The purpose of this article is to develop a standard range of resonant vibration equipment for compacting concrete mixtures and a methodology for calculating its main parameters. The object of research is the oscillatory system of a vibrating machine, consisting of two masses connected by the elastic and dissipative elements. In addition, the first mass is connected to a fixed base through elastic and dissipative elements. Materials and methods. The basic principles of theoretical mechanics, mathematical modelling and statistical processing of results were used in the research. Results. According to the research results, it was established that with an increase in the mass ratio of the oscillatory system, the dynamic coefficient decreases, and the width of the resonant zone increases. The regression equations are given. It has been established that with increasing rigidity of the working body, the dynamic coefficient decreases, and the horizontal section on the frequency response, the width of which does not change significantly, shifts to the region of higher frequencies. With an increase in the damping coefficient, the dynamic coefficient decreases, and the width of the resonant zone and the frequency range practically do not change. A wide range of nomenclature and masses of precast reinforced concrete justifies the development of a standard-size range of resonant vibration equipment. A standard range of light (up to 2 tons), medium (2-6 tons) and heavy (6-10 tons) types has been developed. Based on the analysis and generalization of research results, a method for calculating resonant vibration equipment for compacting concrete mixtures has been developed, which makes possible to increase its energy efficiency.
{"title":"Type series of resonant vibration equipment for concrete mixtures compaction and its main parameters calculation method","authors":"V. G. Zedgenizov, S. Kh. Faizov","doi":"10.26518/2071-7296-2023-20-5-540-547","DOIUrl":"https://doi.org/10.26518/2071-7296-2023-20-5-540-547","url":null,"abstract":"Introduction. Increasing the energy efficiency of vibration technology poses a number of challenges for its developers. A promising direction for reducing energy costs for driving vibration machines is the use of the resonance phenomenon. Due to the dynamic properties of the oscillatory system, it is possible to significantly reduce the power consumption of resonant vibration equipment, and in some cases, improve the quality of the products. The purpose of this article is to develop a standard range of resonant vibration equipment for compacting concrete mixtures and a methodology for calculating its main parameters. The object of research is the oscillatory system of a vibrating machine, consisting of two masses connected by the elastic and dissipative elements. In addition, the first mass is connected to a fixed base through elastic and dissipative elements. Materials and methods. The basic principles of theoretical mechanics, mathematical modelling and statistical processing of results were used in the research. Results. According to the research results, it was established that with an increase in the mass ratio of the oscillatory system, the dynamic coefficient decreases, and the width of the resonant zone increases. The regression equations are given. It has been established that with increasing rigidity of the working body, the dynamic coefficient decreases, and the horizontal section on the frequency response, the width of which does not change significantly, shifts to the region of higher frequencies. With an increase in the damping coefficient, the dynamic coefficient decreases, and the width of the resonant zone and the frequency range practically do not change. A wide range of nomenclature and masses of precast reinforced concrete justifies the development of a standard-size range of resonant vibration equipment. A standard range of light (up to 2 tons), medium (2-6 tons) and heavy (6-10 tons) types has been developed. Based on the analysis and generalization of research results, a method for calculating resonant vibration equipment for compacting concrete mixtures has been developed, which makes possible to increase its energy efficiency.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135087185","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}
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