Bulletin of Bryansk state technical university最新文献

{"title":"ASSESSMENT OF THE SAFETY OF PASSENGER CARS IN CASE OF AN EMERGENCY ROLLOVER ON THE RAILROAD TRACKS","authors":"O. Bondarenko","doi":"10.30987/1999-8775-2021-9-49-54","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-9-49-54","url":null,"abstract":"The purpose of the work is to assess the safety of passenger cars in case of an emergency rollover on the body of railroad tracks. The paper introduces a method for predicting injury of railway transport passengers as a result of swinging over the wagon on the body of railroad tracks. The method of research is mathematical modeling of scenarios of swinging over the wagon on a flat bottom or earth tramp of the railway track. A model of a passenger compartment has been developed, which is supplemented with models of a roomette, hand luggage and an anthropometric dummy. The originality of the work is the use of mannequin models for an accident with the rollover of a compartment car on the body of the railroad tracks and obtaining data on the interaction of fit models and a compartment car. The result of the study is the reported values of possible injury to passengers during an emergency rollover of a passenger car. Namely, the values of the head injury criterion, cervical vertebrae, breast and hips of the crash test dummy have been obtained. In comparison of the two considered scenarios of swinging over the wagon, the value of the head injury criterion for overturning the car on an inclined surface is 15% higher, the neck injury criterion is 30% higher, and the hip and chest injury criterion is 23% higher for mannequins on the upper shelves of the compartment due to their interaction with hand luggage. The obtained values do not exceed critical ones. The most dangerous positions of the mannequin model in the compartment of the car are revealed. Conclusions concerning the sufficient safety of the passenger car are formed and recommendations for the development of additional technical solutions to improve the safety of passenger cars are given.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85134122","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":"CONTROL AND MONITORING OF FUSION WELDING BY WAY OF EXAMPLE OF MANUFACTURING AIRCRAFT AIR CONDITIONING SYSTEMS ELEMENTS","authors":"V. Merkulov, S. Lazarev","doi":"10.30987/1999-8775-2021-9-23-28","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-9-23-28","url":null,"abstract":"The purpose of the study is estimation of the efficiency of the control systems use for improving the organization of various welding processes and perfectibility of the technological discipline of their implementation. \u0000The article opens the concept of \"welding production management\" as a comprehensive quality and performance management system of the welding process. \u0000The solution to the problem of reducing the time for optimizing structures was the introduction of a new computer system. It successfully collects data for calculating and analyzing the space of design solutions, for more accurate forecasting of product characteristics based on numerical modeling. The additional module performs the analysis and optimization of the welding process in an interdisciplinary optimization environment. The algorithm sets up strategies for finding the best solution based on the required characteristics and properties of the product. Hybrid and adaptive search methods are used for this purpose. \u0000The new process eliminates the need to use several segmental systems, while all optimization is now performed in a unified environment. \u0000The exclusion of the human factor in the selection and installation of the welding mode increases the qualitative and quantitative indicators of the entire technological process, since the preparatory and final time in welding can reach 20% of the entire operation time, and an error in one parameter can lead to a final defect of the whole workpiece.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83548469","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":"FINE GRIT TREATMENT OF RANGY PLATES","authors":"V. Scriabin","doi":"10.30987/1999-8775-2021-9-15-22","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-9-15-22","url":null,"abstract":"The features of the final machining of thin-walled plates are given. The calculation scheme for the kinematic parameters of abrasive finishing of thin-walled easily deformable plates and the mathematical dependence for calculating the pressure on the lapping faceplates with the processed parts are determined. The aim of the work is to obtain an analytical dependence that establishes the relationship between the operating parameters and the conditions of the abrasive finishing process with the roughness of the working surface of the plates. The task, which the article is devoted to solve is theoretical and experimental studies of the influence of technological modes and conditions of abrasive finishing of plates with complex relative movement of parts and lapping on the roughness of the treated surfaces, as well as in the development of a methodology for determining rational modes and conditions of surface treatment of thin-walled plates. Theoretical research was carried out on the basis of the main provisions of mechanical engineering technology, grinding theory, theoretical mechanics, theory of elasticity and plasticity, probability theory and mathematical statistics. Experimental studies have been carried out according to standard methods in production and laboratory conditions using certified control and measuring equipment. The obtained data were processed using computer technology and presented in the form of empirical dependencies that are convenient for practical application. \u0000The originality of the work consists in obtaining mathematical dependencies for calculating the kinematic parameters and parameters of the contact interaction of abrasive particles with the treated surfaces of the plates, which allow determining the rational values of the ratio of the speeds of movement of the plates and lapping.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79704412","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":"DETERMINATION OF THE DIMENSIONAL AND TOPOLOGICAL PARAMETERS OF THE GRAPHITE PHASE IN CAST IRON BY FRACTAL ANALYSIS OF IMAGES OF ITS MICROSTRUCTURE","authors":"Konstantin I. Makarenko, A. Poddubnyy, Sergey Glushenok, Ekaterina Zencova","doi":"10.30987/1999-8775-2021-9-4-14","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-9-4-14","url":null,"abstract":"The basics of metallography and modern systems used for studying and analyzing the structures of materials are described. Special attention is paid to the techniques of quantitative microscopy, as a kind of ancestress of modern microstructure analysis systems. The analysis of modern computer programs used to analyze images of microstructures obtained from digital microscopes is presented. The basics of fractal analysis as a highly effective tool for calculating numerical values of parameters of geometrically complex objects are outlined. Using the example of the analysis of graphitized cast iron structure, the application of the fractal analysis method to determine such characteristics of the graphite phase as the shape of graphite inclusions and their distribution in the alloy volume is demonstrated. As part of the study, various classes of cast iron have been studied, such as graphitic pig iron with flaked graphite, cast iron with vermicular graphite, and high-grade cast iron with spheroidal graphite. To determine the shape of graphite inclusions, a fractal dimension has been proposed to be used, and the unevenness of the distribution has been estimated using such a function as lacunarity. The individual stages of determining these characteristics using a specialized FracLac module applied in the structure of the ImageJ program are presented. The obtained results showed high adequacy. Despite positive assessment, the shortcomings identified during the research on the use of fractal analysis methods for identifying geometrically complex dimensional and topological parameters inherent in the graphite phase in cast iron are noted. The ways for further improvement of these methods for solving a wide range of problems in metallography of alloys are proposed.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75068657","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":"AUTOMATED TRANSPORT-TECHNOLOGICAL SYSTEM OF TRAFFIC MANAGEMENT AND FORMATION OF TRAFFIC PASSAGES","authors":"M. Shalygin, Sergey Olisov, Mariya Vasina","doi":"10.30987/1999-8775-2021-8-87-95","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-87-95","url":null,"abstract":"There is considered a problem of road traffic organization at crossroads under conditions of urban environment and outgoing highways. The urgency of the problem of automated traffic control with the information for vehicle drivers about traffic situation using both navigation systems and warning systems by means of signal transfer to radar-detectors is shown. \u0000 The investigation purpose consists in the development of automated self-regulated system of traffic lights control on the basis of vehicle number approaching to the traffic lights and vehicle driver warning about traffic jam approaching for the purpose of its going around. \u0000 In the paper there are solved problems regarding traffic capacity of a megapolis traffic system, driver warning about problem road situations and the automation of these processes. On the basis of the theory of automated control there is shown a developed system allowing the formation of a traffic passage by means of driver warning about traffic jam ahead. There are described thoroughly component parts of the system limiting only with the choice of components among prototypes available in the market. \u0000A principle of automated traffic flow control at the crossroads supplied with the traffic lights is shown. There is shown a functional diagram of the interaction of system components for the successful traffic organization. The algorithm of the system automation functioning with its adjustment to certain time intervals of the effect of the enabling traffic light signal at a particular T-shaped or X-shaped intersection is described. The system developed for traffic control at intersections allows relieving considerably city streets. The analysis of the system has shown that traffic lights adaptive control allows decreasing traffic up to 70%. The application of domestic software components decreases system cost by 2-4 times as compared with foreign prototypes which, among other things, do not have the functional offered.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79924283","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":"STAND OF SYSTEMS AND MEANS OF AUTOMATION OF EQUIPMENT REFUELING OF PETROLEUM RESERVOIRS","authors":"V. Matlakhov, V. Khandozhko","doi":"10.30987/1999-8775-2021-8-38-45","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-38-45","url":null,"abstract":"The aim of the work is to develop a general structure of the stand that simulates the operation of systems and means of automation of equipment for tank farms of oil products using modern hardware and software, for researching the operation of algorithms for protection and interlocks, alarms and automatic control in accordance with the current regulatory documentation based on modern micro- processor systems. The method of system analysis, the theory of automatic control, structural solutions of human-machine systems intended for the automation of production and intelligent support of control processes and the necessary data processing in organizational, technological and distributed control systems were used. The concept of the stand, the block diagram of the control system and the hydraulic diagram of the stand have been developed. The novelty of the work lies in the creation of a compact model of a tank farm with a complex distributed control system for researching its operation.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77736771","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":"FORMATION OF EXPERIMENTAL AND METHODICAL BASIS TO ESTIMATE STRENGTH CORRESPONDENCE OF DOMESTIC PASSENGER CAR BODIES TO EUROPEAN STANDARD BASIS","authors":"S. Korshunov, A. Skachkov, S. Samoshkin, A. Smirnov, Dmitriy Goncharov","doi":"10.30987/1999-8775-2021-8-67-76","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-67-76","url":null,"abstract":"The development of the international trade and the entrance of domestic car manufacturers into international markets required bench equipment development for tests in accordance with the requirements of the European standards. \u0000 In this connection the purpose of this work is to develop an experimental and methodical basis for the estimation of the strength correspondence of export railway produce to the European standard basis. \u0000In the work there is shown a description of the bench developed for static tests of rolling stock for loads corresponding to the European standard basis. \u0000In the requirements mentioned there is used a more extended list of loads and combination of efforts and the necessity in the application of longitudinal loads to the elements of the end wall in three levels should be particularly emphasized. \u0000On the test bench there are carried out static tests of the car of model 61-4514 for Egyptian national railways and the body of the motor-rail car of model 2853 for the railway infrastructure of Serbia.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86771877","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":"COMPUTATION OF PLATE GEOMETRY OF DRIVE CHAIN FOR VALVE TIMING GEARS OF VEHICLES","authors":"A. Fot, Elena Rassoha, V. Rassoha","doi":"10.30987/1999-8775-2021-8-61-66","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-61-66","url":null,"abstract":"The purpose of the study is to evaluate the geometric parameters of the plates of roller chains used in the supply of gas distribution mechanisms of motor vehicles. The method used is an analytical representation of the dependencies of the plate shape. The relevance of the proposed approach is justified by the great complexity of pre-design studies for choosing the type of drive chain of various mechanisms. Main results-dependences are proposed for determining the area of plates both with the \"eight\" type shape of the inner link of a standard roller (bushing) chain, and plates with straight side faces, and it is reasonable to choose the design of the drive chain for the specified operating loading conditions. Dependencies have a scientific novelty and practical significance when used in the production activities of employees of technological departments and design services of machine-building and auto repair enterprises.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78900475","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":"PECULIARITIES OF UNIVERSAL BODY DESIGN FOR INNOVATION REFRIGERATOR CARS","authors":"O. Voron","doi":"10.30987/1999-8775-2021-8-77-86","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-77-86","url":null,"abstract":"There are considered analysis results of stress-strain state in the load-bearing structure of three versions of refrigerator cars with different arrangement solutions of refrigerating-heating plants (RHP) and a thermos car at its cooling with liquid nitrogen. \u0000 By means of the “APM WinMachine” application there are presented model parameters of a basic universal body. The analysis of calculation results has shown sufficient strength and potentialities for updating an available car metal structure for the application as a universal body of a refrigerator car. \u0000Work purpose: the estimation of a stress-strain state in the load-bearing structure of a basic body for insulated cars of different types of refrigerator- and thermos cars. \u0000Investigation methods: for the analysis of the stress-strain state in a load-bearing structure in three versions of the bodies of refrigerator- and thermos cars under loads with “Normal” modes there was used the “APM WinMachine” software complex realizing a finite element method. \u0000Results and novelty: for the first time there are offered arrangement solutions for the location of refrigeration-heating plants earlier not used for refrigeration rolling-stock (RRS). A stress-strain state of the body of the thermos car at the impact of overpressure upon it of gaseous nitrogen evaporated in cargo compartment is estimated. \u0000Conclusions: the analysis of calculation results for all three versions of the RHP arrangement and a solid body of a thermos car has shown sufficient strength and possibility regarding simple updating an available body metal structure which may be used as a universal car set.","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"87 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81603409","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":"AUTOMATION OF CONTROL PROCESS TO ENSURE TOOL QUALITY DURING FINISHING WITH GLOW DISCHARGE PLASMA","authors":"V. Logvin, T. Karlova","doi":"10.30987/1999-8775-2021-8-14-21","DOIUrl":"https://doi.org/10.30987/1999-8775-2021-8-14-21","url":null,"abstract":"Work purpose: the development of conditions for control automation ensuring tool essential qualities at the stage of finishing with glow discharge plasma. \u0000Investigation methods: based on the peculiarities of a human mental process the formation of an electronic model of a neural control system on the basis of engineering process monitoring in industry promoted cybernetic method carrying out for the increase of effectiveness and quality control during the management. The formation of an investigation process for computer technology use at the solution of the problem to ensure specified quality at the realization of engineering processes for metal working tool strengthening in the plasma generator of a glow discharge allowed creating an efficient system of control. The creation of conditions for the fulfillment of human cognitive potentialities with the high degree of similarity such as identification, accumulation and dissemination or transfer of information in the form of electromagnetic pulses similar to neural exchange allows optimizing a control system of quality of product strengthening in the plasma generator of a glow discharge. The formulation of a management solution in the form of the chain of commands in the neural network of the control system of the plasma generator of a glow discharge is formed in accordance with phenomena forming output responses and conditions ensuring their formation. \u0000Investigation results: for setting an optimum field of investigations and, accordingly, for increasing effectiveness of the automated control system of finishing quality under the glow discharge plasma impact during the whole engineering process the use of unique potentialities of continuous neural network monitoring is intended. The application of the neural network approach and its unique functions at the formation of the control system using the continuous monitoring of basic engineering process parameters of finishing ensuring specified quality of machining steps realized allows ensuring high repeatability at metal working tool strengthening. In the technological system developed all functions of control and management are based on the use of the neural network approach that allows visualizing its functioning on the monitor in the course of the whole engineering finishing process in the form of graphical dependence. \u0000Conclusions: \u00001. The use of unique potentialities of continuous neural network monitoring allows defining a optimum field of investigations at the lowest cost and accordingly increasing quality of the automated system of finishing quality control at the impact of glow discharge plasma. \u00002. Depending on material of a tool working part and conditions of tool operation in the surface layer there is formed an essential thermo-dynamic structure with the specified physical-mechanical properties that allows ensuring optimum repeatability. \u00003. The formation of conditions for the fulfillment with a high degree of similarity human cognitive ","PeriodicalId":9358,"journal":{"name":"Bulletin of Bryansk state technical university","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90892309","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}