International Journal of Transportation Engineering and Technology最新文献

{"title":"Metro Vehicle Axle Temperature Monitoring Device Based on Piezoelectric Vibration","authors":"Yiyun Zhao, Ruyan Huang","doi":"10.11648/J.IJTET.20190504.14","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190504.14","url":null,"abstract":"The axle temperature monitoring of subway vehicles is a key technology to ensure the safety of trains. The existing axle temperature monitoring system is monitored by using trackside equipment or using axle temperature test paper, the system has the inferiority of poor real-time performance. In order to realize real-time and online monitoring of axle temperature, this paper presents a subway axle temperature monitoring device based on vibration energy recovery. The device is installed on the shaft end of the train axle, and uses the positive piezoelectric effect of piezoelectric ceramics to absorb vibration energy into electric energy, and continuously sends temperature signal through the radio frequency module to realize real-time monitoring of train axle temperature. A mathematical model of piezoelectric vibrator power output was established to obtain design parameters suitable for rail vehicle vibration, and the Ansys Workbench finite element analysis software was used for theoretical simulation verification. Finally, an experimental model was built and a vibration test was carried out on Shanghai metro line 1. The results show that the axial temperature monitoring device based on piezoelectric vibration can effectively obtain the axial temperature data and realize the online monitoring function.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127673733","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":"Finite Element Modeling and Static Strength Analysis on Structure Strength of the High-Speed Maglev Bogie","authors":"X. Shimeng, L. Cen, Yao Yijing, Yu Yuqing, Liu Weiya, Li Qiang","doi":"10.11648/J.IJTET.20190504.15","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190504.15","url":null,"abstract":"Maglev train with no mechanical contact of the innovative technology, as well as a series of excellent economic and environmental advantages came into being. More and more people pay attention to it, and it has become one of the most promising transportation means in the new century. According to the actual operation of maglev train, a boundary constraint method is proposed in this paper. On the basis of the actual operation of maglev train, a method of boundary constraint is proposed, and the finite element model is established by using HyperMesh software. Afterwards using ANSYS analysis software to analyzed the statics performance of levitation chassis under the four working conditions of maglev vehicle, and static strength of the levitation chassis based on von Mises stress was assessed. In accordance with the results, the parts with high stress are optimized. The result showed that the stress intensity on the back of the air spring mounting base is relatively high. This situation can be improved by changing the radius to 40 mm fillets. The strength of other parts meets the standard requirement and provided the basis for further optimization calculation. The results have laid a foundation for the fatigue strength test of the suspension chassis of high-speed maglev train.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"179 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114246046","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":"Quality Acceptance Methods and Standards for Continuous Compaction Control Technology","authors":"Zhang Daoxiu, Jiang Huihuang, Gao Ming-xian, Zhang Jiandong, Xiang Weiguo, Yan Xiaoxia, Guo Dong, Zhao Chongji, Wu Longliang","doi":"10.11648/J.IJTET.20190504.13","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190504.13","url":null,"abstract":"In order to promote the wide application of continuous compaction control technology in China, the continuous compaction control technical regulations of various countries and regions in the world are taken as research objects, and the technical characteristics and application conditions of various countries' regulations are compared and analyzed. The current continuous compaction control technology is analyzed. The main quality acceptance methods and standards, summed up the application experience of the technology around the world. The results show that the comprehensive evaluation of the comprehensive evaluation of compaction degree, compaction uniformity and compaction stability is the trend of quality control standards development. The calibration method is mainly used. The problem of water content of fine particle fillers has a significant impact on continuous compaction control and has been widely recognized. The water content of the filler needs to be controlled in engineering applications. The basic theory of continuous compaction control method is becoming more and more mature, and the development direction of the actual compaction problem is gradually developed. The accuracy requirement of continuous compaction control is gradually improved. The weak area identification method is supplemented by the incremental method of measurement. The reasonable selection of evaluation methods for engineering characteristics is an effective way to promote the successful application of continuous compaction control technology.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122834166","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":"Gaining Competitive Advantage at Sea: An Overview of Shipping Lines’ Strategic Decisions","authors":"Enrico D'agostini, Hyung-Sik Nam, Seung-Hyeob Kang","doi":"10.11648/J.IJTET.20190504.12","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190504.12","url":null,"abstract":"The liner shipping sector has significantly changed in recent years. Largest shipping lines have expanded their business scope becoming global carriers and a recent wave of industry consolidation has profoundly modified the market structure and, consequently, the business models followed by liners. This, coupled with weak market fundamentals, generally poor balance sheets, and ordering of increasingly larger container vessels, has led each shipping line to follow a specific dominant strategy aimed at increasing market shares, margins and creating value for costumers. This article proposes an overview of the main market strategies pursued by the largest shipping lines. Through an analysis of major container lines strategies, the study aims at identifying what are the preferred strategies to gain competitive advantage. Particularly, the concept of diversification (product and geographical diversification), modes of diversification (internal and external), differentiation and concentration are comprehensively discussed and applied to the liner shipping industry. Furthermore, it tries explaining what are the most significant similarities and differences in market strategies in relation to the size of each shipping line. The review of our analysis suggests that 1) all shipping lines follow a hybrid strategic model with more than one individual strategy pursued 2) larger shipping lines prefer to diversify or differentiate 2) mid-sized shipping and smaller lines tend to pursue market concentration.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130198295","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":"Predicting of the Residual Resource of Car Assemblies","authors":"I. Vladimir, V. Tatyana, P. Stanislav","doi":"10.11648/J.IJTET.20190504.11","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190504.11","url":null,"abstract":"The research paper introduces a method that can be used for the forecasting the residual life of automobile aggregates (through the example of automobile engines). The results of a test-drive have shown that the proposed method is less labor intensive and has a satisfactory forecast accuracy. In the research the tenets of the reliability theory and mathematical statistics were used as well as information on the post-repair operating time of repaired engines based on the value of the initial main parameter (the gap between the piston and cylinder) for 41 engines. The probability density of this parameter follows the Gauss’ law. In our work we accept the nonlinear change in the mathematical expectation of the main parameter depending on the operating time in the form of a power law. The probability density of the aggregate resource is distributed according to the Weibull law. Adequacy of theoretical information to experimental data was determined by the Fisher criterion. The forecasting of the residual life of the aggregates is relevant when the operating time approaches their limit state. The relative forecast error varies from 0.021 to 0.130, which is quite acceptable for the real-world applications.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132370963","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":"Blockchain Technology as a Risk Mitigation Tool in Supply Chain","authors":"Mian Wasim Layaq, Alexander Goudz, B. Noche, Muhammad Atif","doi":"10.11648/j.ijtet.20190503.12","DOIUrl":"https://doi.org/10.11648/j.ijtet.20190503.12","url":null,"abstract":"The main purpose of this paper is to investigate the research development in supply chain risk management (SCRM) and to connect the new emerging digital technology Blockchain that could help to mitigate risks in any supply chain. Emerging literature, case studies, citations are used to fulfil this the task. The study will explore Blockchain and supply chain risks in details and will compare, how Blockchain based supply chain can mitigate these risks. There are many risks associated to supply chains but we will limit our study to only supply risk and study different areas of Blockchain application in supply chain with supply risk. Blockchain technologies have a potential to upgrade current supply chains. This will not only increase its performance in terms of speedy flow of raw material, finished goods, information and money flow but also help to mitigate current risk in supply chain by increasing visibility and transparency of supply chain. Smart contracts, IoT and Blockchain can serve together to achieve maximum efficiency and effectiveness in SCM. This research contributes to explore further research fields of Blockchain technology in different areas of supply chain risk management.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128383707","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":"An Evaluation for the Use of Blockchain Technology in Logistics","authors":"Alexander Goudz, Valentino Steiner","doi":"10.11648/J.IJTET.20190501.12","DOIUrl":"https://doi.org/10.11648/J.IJTET.20190501.12","url":null,"abstract":"The following article sums up the current problems of the logistics and explains how the Blockchain technology can help to solve some of them. A utility value analysis is used to quantify the scenarios the Blockchain is most likely to be used in. This offers a result that, in comparison to current research, does not only show the opportunities but also how likely they are to be used in these sections. In the next step these scenarios are compared with each other. These results lead to a outlook to potential applications of the Blockchain technology in the logistics.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"31 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129213636","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":"Roadway Pavement Design Methods, Structural Approaches and Relevant Computer Algorithms: A Critical Review","authors":"Elvis Siaway Kwado Mensahn, Surajo Abubakar Wada, Lameck Lugeiyamu","doi":"10.11648/j.ijtet.20220801.12","DOIUrl":"https://doi.org/10.11648/j.ijtet.20220801.12","url":null,"abstract":": Transport and international agencies invest millions of dollars on road projects to support countries develop their infrastructure; therefore, it is important to ensure longer service life and value for money. The primary function of the pavement structure is to keep distresses, including fatigue cracking and permanent deformation, to an acceptable limit so that the pavement can withstand applied vehicle load and repetitions during the service duration. Furthermore, the layered structure of the pavement is intended to ensure that the vehicle contact pressure is distributed in such a way that critical responses at the bottom layer of the pavement are low enough to avoid severe damage. Two typical procedures associated with roadway pavement design are empirical-based and structural analysis methods. However, the empirical-based methods have significant shortcomings, as predicting the mode and extent of pavement performance becomes a major challenge. Alternatively, the structural analysis methods have advanced extensively with computers since they consider crucial factors such as traffic loads, material characteristics and environmental conditions. The imputation of these parameters into the computer algorithm contributes to a better understanding of the mechanical performance of constituent pavement material responses. The predicted responses enable highway engineers to select appropriate pavement compositions that will deteriorate at a satisfactory level during the time of service. The most common structural analysis approaches are analytical modelling and numerical simulation. On the other hand, differences in analysis results generation using these approaches have been a notable concern. This review article presents a synopsis of typical pavement design methods and the problem connected with them; structural approaches to identify factors influencing their accuracy. Furthermore, computer algorithms use due to their usefulness, and the assumptions of layered theories employed in pavement structural design are discussed to uncover potential drawbacks for future upgrades.","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"10 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":"132265303","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":"Assessment of the Effect of out-of-Stock on Customers Purchasing Behavior","authors":"Dawit Hussein Ali","doi":"10.11648/j.ijtet.20190502.11","DOIUrl":"https://doi.org/10.11648/j.ijtet.20190502.11","url":null,"abstract":"","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"60 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":"116338555","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 Effect of Pavement Damage on Number of Accidents and on Traffic Congestion on Roads Using Multivariate Analysis of Variance","authors":"Angelina Auma Abuodha Oyoo, Moses Wakoli Wamalwa, Pius Nderitu Kihara","doi":"10.11648/j.ijtet.20220801.11","DOIUrl":"https://doi.org/10.11648/j.ijtet.20220801.11","url":null,"abstract":"","PeriodicalId":265375,"journal":{"name":"International Journal of Transportation Engineering and Technology","volume":"47 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":"132530104","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}