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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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International Journal of Railway
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Korean Society for Railway
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Volume & Issues
Volume 1, Issue 4 - Dec 2008
Volume 1, Issue 3 - Sep 2008
Volume 1, Issue 2 - Jun 2008
Volume 1, Issue 1 - Mar 2008
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Defect Monitoring In Railway Wheel and Axle
Kwon, Seok-Jin ; Lee, Dong-Hyoung ; You, Won-Hee ;
International Journal of Railway, volume 1, issue 1, 2008, Pages 1~5
The railway system requires safety and reliability of service of all railway vehicles. Suitable technical systems and working methods adapted to it, which meet the requirements on safety and good order of traffic, should be maintained. For detection of defects, non-destructive testing methods-which should be quick, reliable and cost-effective - are most often used. Since failure in railway wheelset can cause a disaster, regular inspection of defects in wheels and axles are mandatory. Ultrasonic testing, acoustic emission and eddy current testing method and so on regularly check railway wheelset in service. However, it is difficult to detect a crack initiation clearly with ultrasonic testing due to noise echoes. It is necessary to develop a non-destructive technique that is superior to conventional NDT techniques in order to ensure the safety of railway wheelset. In the present paper, the new NDT technique is applied to the detection of surface defects for railway wheelset. To detect the defects for railway wheelset, the sensor for defect detection is optimized and the tests are carried out with respect to surface and internal defects each other. The results show that the surface crack depth of 1.5 mm in press fitted axle and internal crack in wheel could be detected by using the new method. The ICFPD method is useful to detect the defect that initiated in railway wheelset.
Characteristic Analysis of a Linear Induction Motor for a Lightweight Train According to Various Secondary Schemes
Lee, Hyung-Woo ; Lee, Sung-Gu ; Park, Chan-Bae ; Lee, Ju ; Park, Hyun-June ;
International Journal of Railway, volume 1, issue 1, 2008, Pages 6~11
This paper presents a performance characteristic analysis methodology for a linear induction motor used for a lightweight train. In general, an analytical method cannot provide accurate results in a linear motor because of large airgap, end effect, transverse edge effect, 3-dimensional configurations, large leakage, and so on. Besides, a numerical method requires lots of memory and solving time for transient analysis. However, the suggested methodology which is a kind of hybrid solution with an analytical method and a numerical method is very fast and accurate. Based on the methodology, 3-D FEM analyses for various design schemes of the secondary reaction plate have been done and from the analysis results, the best configuration for an urban railway transit is chosen.
The Regional Economic Impacts of Taiwan High Speed Rail
Huang, Hank C.C. ; Hsu, Tao Hsin ; Lin, Cynthia M.T. ;
International Journal of Railway, volume 1, issue 1, 2008, Pages 12~19
Starting her business operation on January 5 2007, Taiwan High Speed Rail(THSR) shapes a new time-space frame for Taiwan western corridor, where more than 90% of national population lives around and more than 95% gross domestic product created from. Comparing with the four-hour traveling time by highway before 2007, THSR reduces the time required to one and half hours from Taipei to Kaohsiung. It will not only benefit the communication along the island from north to south, but also change the location advantages/disadvantages for all cities in these regions. Therefore, this paper establishes a spatial computable general equilibrium model(SCGE Model) to simulate the economic effect of High Speed Rail(HSR). This SCGE model divides Taiwan economy into fifteen geographic regions and thirteen industries. Each region has three sectors: household sector, transportation sector, and industries sector. Following the behavior function of economic theories, the general equilibrium can be achieved simultaneously. Thus, gross regional product (GRP), capital formation, employment income and welfare/utility level can be all observed by calculating the different economic result between cases with-/ without-HSR. Besides, this model presents the social welfare benefit from HSR operation, the polarization phenomenon among regions and within certain region, unbalance distribution of welfare along the HSR line, and industries development divergence among regions etc. These major findings should be useful for regional development policy making.
Estimation of Dynamic Conditions of Rolling Stock Structural Methods and Interpretations
Olegovich, Moskovskikh Alexander ; Yur'evich, Upyr' Roman ; Alekseevich, Zasjadko Anatolij ;
International Journal of Railway, volume 1, issue 1, 2008, Pages 20~29
Features of procedures of dynamic synthesis are considered at use of various interpretations or models of processes in mechanical oscillatory systems. Methodological bases for research of the wave processes develop, allowing receiving some features of distribution of indignations. Authors offer scientifically-methodical bases for the decisions received analytical by.