The National Transport University Bulletin最新文献

{"title":"IMPORT ACTIVITY IN UKRAINE AND WAYS TO IMPROVE IT","authors":"Levchuk N, Petrovska S","doi":"10.33744/2308-6645-2022-4-54-121-132","DOIUrl":"https://doi.org/10.33744/2308-6645-2022-4-54-121-132","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115379827","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":"ALTERNATIVE FUELS FROM RENEWABLE RESOURCES FOR AUTOMOTIVE DIESEL ENGINES","authors":"A. Korpach, O. Levkivskyi, O. Korpach","doi":"10.33744/2308-6645-2023-1-55-152-158","DOIUrl":"https://doi.org/10.33744/2308-6645-2023-1-55-152-158","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"38 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121041161","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":"URBAN DISTRIBUTION CENTER LOCATION","authors":"Datsenko D, Kunytska O","doi":"10.33744/2308-6645-2022-1-51-172-180","DOIUrl":"https://doi.org/10.33744/2308-6645-2022-1-51-172-180","url":null,"abstract":"The article considers the goals of creation and success factors of the UDC, their location problems, presents the algorithm for determining the logistic sustainability index (LSI), which affects the integrated development of logistics of the study area of the UDC. Facilities – urban distribution centers. The purpose of the work is to analyze general information on the goals of creation and success factors of the UDCs, problems in finding their location, as well as consideration of the process of evaluating the logistics sustainability index. Research methods – the method of analysis of hierarchies, the method of weighted sum. LSI is an integrated tool that can quantify the overall efficiency of a logistics system according to different criteria and different points of view. Thus, the LSI can jointly assess one or more areas of impact on the UDC allocation and becomes useful when a comparison between the current situation and a potential scenario is required, or when two potential scenarios need to be compared by impact area (eg energy consumption, pollutant emissions). KEYWORDS:SELECTION OF LOCATION, URBAN DISTRIBUTION CENTER, CITY LOGISTICS, LOGISTICS SUSTAINABILITY INDEX(LSI)","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124847240","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":"ANALYSIS OF RESEARCH IN THE FIELD OF FREIGHT TRANSPORT IN THE CONDITIONS OF A SUSTAINABLE CITY","authors":"O. Hulchak, M. Tochyhin","doi":"10.33744/2308-6645-2023-1-55-079-088","DOIUrl":"https://doi.org/10.33744/2308-6645-2023-1-55-079-088","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125278236","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":"WORLDWIDE HARMONIZED LIGHT VEHICLES TEST PROCEDURES (WLTP)","authors":"А.О. Korpach, O. Korpach","doi":"10.33744/2308-6645-2019-1-43-076-083","DOIUrl":"https://doi.org/10.33744/2308-6645-2019-1-43-076-083","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125341317","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":"UKRAINE IN THE GLOBAL DIVISION OF LABOR: CHALLENGES AND OPPORTUNITIES","authors":"Pavliuk V, Mulenko V","doi":"10.33744/2308-6645-2022-4-54-177-185","DOIUrl":"https://doi.org/10.33744/2308-6645-2022-4-54-177-185","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116542354","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":"SYSTEM ASPECTS OF DETERMINING THE OPTIMAL ORDER SIZE AVAILABLE IN STOCK MANAGEMENT MODELS PERISHABLE FOOD PRODUCTS","authors":"T. Vorkut, O. Bilonoh, L. Volynets, D. Ovchar, I. Khalatska, M. Pozniak","doi":"10.33744/2308-6645-2023-2-56-040-052","DOIUrl":"https://doi.org/10.33744/2308-6645-2023-2-56-040-052","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122390301","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":"ANALYSIS OF THE PROCESS OF BRAKING OF WHEELED VEHICLES IN THE CONDITIONS OF ONBOARD INEQUALITY OF BRAKING MOMENTS","authors":"Demianiuk V","doi":"10.33744/2308-6645-2022-1-51-181-192","DOIUrl":"https://doi.org/10.33744/2308-6645-2022-1-51-181-192","url":null,"abstract":"The article is devoted to the study of the dynamics of curvilinear motion and course stability of wheeled vehicles during braking in conditions of onboard uneven braking torques. The object of the study – wheeled vehicle, the braking of which is investigated on dry, wet and slippery roads. 192 The purpose of the work is to develop methods of modeling and analysis of the braking process of the wheeled vehicle in the conditions of onboard inequality of braking moments. Research method – mathematical and computer modeling of a dynamic system. A mathematical model is proposed, which allows to investigate the occurrence of curvilinear motion (skid) of wheeled vehicle during braking and to analyze how the inequality of braking moments on the left and right wheels of wheeled vehicle affects the parameters of its movement. During braking, significant longitudinal and transverse reactions occur in the contact of the wheels with the road, which cause significant slippage of the wheels in the appropriate directions. Therefore, when determining the transverse reaction that occurs in the contact of wheels with the road, preference in the mathematical model is given not to the classical theory of wheel deflection, but to the concept of the common nature and identical patterns of interaction of the wheel with the road in both longitudinal and transverse directions. Within the framework of the mentioned concept, quantitative research has clarified the physical processes that occur when the brake wheel interacts with the road. The article investigates the influence of the onboard inequality of braking moments on the course angle during braking of a wheeled vehicle. Studies have identified the causes of the variable by the sign and the oscillating nature of the change in time of the course angle of the vehicle during braking, which complicates the driver to carry out the driving process. The results obtained in the article actualize before the designers of wheeled vehicles the question of increasing the stability of the characteristics of the brake mechanisms and the widespread use of automatic gap regulators in the friction pairs of brakes. Predictive assumptions about the development of the object of study – the development of databases to clarify the regulatory documents on the allowable values of on-board inequality of braking torques for different categories of wheeled vehicles. KEY WORDS: WHEELED VEHICLES, BRAKING PROCESS, MATHEMATICAL MODEL, COMPUTER SIMULATION, COURSE STABILITY","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122522032","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":"ON THE QUESTION OF DETERMINATION OF TIRE SELF-ALIGNING TORQUE","authors":"A. Soltus, E. Klimov, L. Taranduska, N. Kostian","doi":"10.33744/2308-6645-2023-1-55-247-261","DOIUrl":"https://doi.org/10.33744/2308-6645-2023-1-55-247-261","url":null,"abstract":"","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122952839","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 AND COMPUTER SIMULATION OF THE STRESS STATE CAUSED BY THE DISPLACEMENT OF A RIGID CIRCLE DISC IN A PIEZOELECTRIC SPACE","authors":"Kirilyuk V, Levchuk O, G. V., Viter M","doi":"10.33744/2308-6645-2022-1-51-226-233","DOIUrl":"https://doi.org/10.33744/2308-6645-2022-1-51-226-233","url":null,"abstract":"Using the mathematical model that takes into account the coupling of force and electric fields in piezoelectric bodies, the stress distribution that occurs when a rigid thin circle disk moves along the axis of symmetry of an electroelastic transversely isotropic material is studied. The exact solution of the space problem of electroelasticity is obtained on the basis of the solution representing of the static equations of electroelasticity for a transversely isotropic body through harmonic functions and using a harmonic potential of a special type. As special cases, from the found analytical solution follow the expressions for evaluating the stress state in an elastic transversely isotropic material for the displacement of a circle hard disk. Computer simulation have been carried out, the influence of the coupling of the force and electric fields on the distribution of stresses under a rigid circle disk. 233 KEY WORDS: MATHEMATICAL MODEL, COMPUTER SIMULATION, PIEZOELECTRIC SPACE, HARD CIRCLE DISK, ELECTRICAL AND STRESS STATE, STRESS DISTRIBUTION, FIELD COUPLING EFFECT.","PeriodicalId":294106,"journal":{"name":"The National Transport University Bulletin","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122023489","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}