• Proceedings of the KSR Conference
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• 2010.06a
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• pp.2179-2194
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• 2010

RAMS is becoming increasingly important in the decision making process for the rolling stock projects in order to improve competitiveness by reducing system life cycle cost while improving reliability, availability, maintainability and safety. In order to apply and manage RAMS of rolling stock systems effectively in the operator perspective, it is essential to integrate and control RAMS systematically from the early stage of rolling stock projects. RAMS management is to implement a RAMS system into rolling stock projects in terms of a rolling stock operator, which presents the strategic directions of RAMS policy, objectives, requirements, control, analysis, measurement and improvement throughout life cycle of rolling stock projects. This article presents a new framework of RAMS management that provides an effective and efficient way for managing RAMS in rolling stock systems in the railway industry.

• Proceedings of the KSR Conference
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• 2003.10a
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• pp.144-150
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• 2003

This paper shows the systematic design technology for development of new high speed rolling stock and the important item by the instance of G7 R＆D project titled "Development of High Speed Railway Technology". This paper also describes core technology and concrete examples of its application during the development of high speed rolling stock.

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.710-713
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• 2004

The domestic railroad industry 2004 April high-speed railroad commerce is the actual condition which is operated and the fact that in spite of railroad standard field many portion does not correspond in international standardize actuality. International standard correspondence propulsion direction and hereafter of railway rolling stock wheel standard it was presented from the research which it sees and the railway rolling stock wheel relation KS standard establishment by law direction it introduced.

• Proceedings of the KSR Conference
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• 2001.05a
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• pp.207-211
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• 2001

Revision and establish of KS(Korean Standards) is currently actively discussed. It is just the time for a new world class standards under the new system with WTO(World Trade Organization). This paper is a part of "Researchs on the Standards in Railway rolling stock Field", as one of KS establish projects. The aim of this study is to define the requirements of railway rolling stock-designs, manufacture, and test methods for automatic complex coupler. In the former KS, there is no items matched with this purpose. Therefore a new part of KS is proposed.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.171-178
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• 2001

Air spring for railway rolling-stock is a part of secondary suspension system which play the role of supporting load, damping vibration. Recently, air springs are actively applied to railway rolling-stock to substitute coil spring with upgrading the manufacturing skill. This study is started to get the fundamental datum related to air spring for the purpose of developing the test draft for air spring. To analyze the performance of air spring, we conducted the simulation for railway rolling-stock applied air spring and tested train in convention lines. Thus, we have obtained useful datum to develop the test draft for air spring. Here, we describe some results.

• Proceedings of the KSR Conference
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• 2003.10c
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• pp.339-344
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• 2003

Air spring for railway rolling stock is a part of secondary suspension system, which is supporting load, damping vibration. Recently, air springs are actively applied to railway rolling stock to substitute the coil spring by upgrading the manufacturing skill. This study is started to develop draft for the testing methods of air spring for railway rolling stock. We have tested several items on testing methods to guarantee the performance of air spring. Thus, we have developed the test draft for air spring.

• Journal of the Korean Society for Railway
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• v.9 no.6 s.37
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• pp.772-777
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• 2006

Three-dimensional numerical study is performed for the flow analysis around the rolling stock with square cross section (Mugungwha train model). The height (H) of rolling stock is considered as the characteristic length and the total length of rolling stock is 40 which correspond to 1/2 unit of rolling stock. The gap between the surface and rolling stock is 0.17H which is average value. The relative velocity between the surface and rolling stock is assumed to be zero and Re=10,000 based on the characteristic length. Low Re ${\kappa}-{\epsilon}$[15] is employed for the calculation of turbulence which resolve all the way to the solid surface (laminar sub-layer). Large flow separation occurred at the front head of train and a pair of vortex is generated on both top and side of rolling stock. The behavior of vortices on the top of the rolling stock is believed to affect the performance of the pantograph which should be intensively investigated. The difference between the high pressure in the front stagnation region of train and the low pressure in the rear separated region causes a large pressure drag. A large pair or vortex are generated in the rear of train and the size of vortex is increased more than the size of cross section of train.

• Proceedings of the KSR Conference
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• 2002.05a
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• pp.423-430
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• 2002

This study was started to develop maintenance technology for wheel tread suitable domestic railway environment. As a pre-study to develop optima] wheel tread, we analyzed the wear characteristics of wheel tread that is being applied to railway rolling-stock in KNR. To analyze wheel wear characteristics. we have conducted the simulation and experiment for passenger rolling-stock and obtained useful datum. Here, we describe some results.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.849-859
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• 2011

Before 2010, assignments proposed by government caused inconvenience of users(operation institutions & customers) as performing that National research organization suggested requirements from private organizations to special institutes, but now the institution of assignments is improving to reflect opinions from the present users. This is a study on methods for drawing a task of Rolling stock's core parts & enhancing of Urban Railway/Light Railway Transit. The definition of multiple stakeholders(local government, operation institution, research organization, academic world, the industrial world, etc.) related to rolling stock of urban railway/Light railway transit, experts in rolling stock and the application for designing of question items verified and designed through Delphi technique for objectivity, justness and fairness. Also, it is to draw a conclusion of assignments through a study on methods for drawing a task of Rolling stock's core parts & enhancing of Urban Railway/Light Railway Transit as sharing a process of assignments and integrating opinions of each stakeholder of urban railway/light railway transit.

• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.1049-1058
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• 2009

Korea's Rolling stock workshop were established with the introduction of a railway, and became the center of industrial construction in the modern age of Korea. There still exist a lot of Rolling stock workshop buildings in the Youngsan Rolling stock workshop, the representative case of Korean Rolling stock workshop, and especially the study aims to look into modern architectural properties centered on those well-preserved buildings. Korea's Rolling stock workshop were built considering the proper conditions of location such as the neighboring districts from the port to transport vehicles and materials, the place where railroad lines are centralized, the short returning distance of railroad cars for entry and departure, and had the facility layout according to the order of a working process of vehicles, and the unique structure and the section facade shape with proper functions and sizes according to each purpose. In particular, they actively adopted steel-frame structure and reinforced concrete structure, and came to have the initial characteristics of Korea's modern industrial building which is called the structural transition. Therefore, this study aims to highlight the importance of Rolling stock workshop including the Youngsan Rolling stock workshop as industrial architecture heritage in the modern age of Korea.