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Yu, Young-Ki;Koo, Ja-Myung;Oh, Min-Soo;Yang, Il-Dong
- The Transactions of The Korean Institute of Electrical Engineers
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- v.65 no.5
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- pp.888-894
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- 2016
In this paper, we describe a method for precisely measuring the abrasion of the railway using an image processing technique. To calculate the wear of the rails, we provided a method for accurately matching the standard rail profile data and the profile data acquired by the rail inspection vehicle. After the lens distortion correction and the perspective transformation of the measured profile data, we used ICP Algorithm for accurate profile data matching with the reference profile extracted from the standard rail drawing. We constructed the prototype of the Rail Profile Measurement System for High-speed Railway and the experimental result on the three type of the standard rail used in Korea showed the excellent profile matching accuracy within 0.1mm.
https://doi.org/10.5370/KIEE.2016.65.5.888 인용 PDF KSCI

Song, Kyoungjoon;Lee, Hyeongill
- Transactions of the Korean Society of Automotive Engineers
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- v.21 no.2
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- pp.55-62
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- 2013
An analytical procedure to determine a proper profile of the spring rail that generates intended contact pressure distribution in the flat wiper blade is introduced. The flat wiper blade is one piece blade and subjected to pressing force at a center point. In this type of blade, contact pressure distribution in the tip of rubber strip is determined by the pressing force, the initial profile of the blade before contact and bending stiffness of the blade. Experimentally obtained bending stiffness of the blade assembly is almost identical to that of the spring rail. Principle of reciprocity has been used to define the initial profile of spring rail from the deformed profile that is assumed to be identical to the windshield glass profile. The procedure has been verified experimentally by measuring the contact pressure of the blade assembled with the spring rail designed by the procedure proposed here. Measured contact pressure distributions of the blades show good agreements with intended distributions over the entire blade span. Consequently, it can be concluded that proposed procedure has relatively good accuracy in developing the spring rail for flat blade having a specific contact pressure distribution.
https://doi.org/10.7467/KSAE.2013.21.2.055 인용 PDF KSCI

Hur, Hyun-Moo;Seo, Jung-Won;Chung, Heung-Chai;Goo, Dong-Hoe
- Proceedings of the KSME Conference
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- 2004.04a
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- pp.934-939
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- 2004
Railway wheel/rail contact conditions have an influence on dynamic behavior of rolling stock. If there are problems of incompatibility between wheel and rail, damages like wheel wear, wheel spalling, rail wear, etc are occurred. Especially wheel and rail profiles are important factor of vehicle curving performance, so compatibility study between wheel and rail has to be carried out preferentially, In this study, we have analyzed the compatibility between wheel and rail of KNR conventional line to improve the maintenance efficiency of wheel and rail. Thus we showed the results relating to wheel/rail geometric contact, vehicle running performances as the change of wheel/rail combination.
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Ashofteh, Roya Sadat
- International Journal of Railway
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- v.6 no.4
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- pp.148-154
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- 2013
This article has tried to review the maximum contact stresses in the contact area of the wheel and rail as a result of lateral movement of the wheel on rail by taking advantage from Hertz theory. Since wheel movement on rail is accompanied by lateral movement due to wheel profile conisity, so the contact point of wheel and rail is not constant and the contact stresses are therefore changeable in every single moment. Since the shape of rail profile and rail inclination, wheel diameter and the mechanical properties of the wheel and rail are effective on the stresses of contact area, these parameters have been studied by applying Hertz theory. This article aims to calculate the contact stresses in different parts on the wheel surface by using Hertz theory.
https://doi.org/10.7782/IJR.2013.6.4.148 인용 PDF KSCI

Jung, Jae-Hee;Oh, Hyeung-Sik;Kim, Chul-Keun
- Proceedings of the KSR Conference
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- 2008.06a
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- pp.936-940
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- 2008
After the introduction of revenue service, abnormal wear has been reported on DMRC EMU wheels that have been manufactured and delivered by Rotem. As a part of an investigation of cause, Rotem has carried out the study of propriety between wheel and rail profile. The wheel profile of DMRC EMU is SK-91146. The material and profile of the wheel was presented by DMRC. The Profile of the rail is UIC 60-1:20. This study tested the propriety of three wheel profiles to include, SK-91146, EN 13715-P8 and UIC s1002 between the rail profile UIC 60-1:20.
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