• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1627-1633
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• 2004

Safety and punctuality in the subway are considered as critical factors. This system is composed of many factors like signals, rails, electrical power sources, rolling stocks. The effective inspection should be carried out at all the times for the safety and punctuality. Purpose of the rolling stocks maintenance is to offer the optimum condition of vehicles, and minimize the maintenance expenses. This paper suggests appropriate maintenance period of rolling stocks to enhance the utility efficiency in SMSC.

• Proceedings of the KSR Conference
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• 1998.11a
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• pp.388-397
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• 1998

This paper gives the way of analyzing internal noise of rolling stocks which is urgently required by civilians. Triangular beam method among ray tracing techniques is utilized to compute noise distribution of rolling stocks. Noise source and transmisstion loss of several sections from experimental work are included in this calculation. Ray tracing technique is found useful to compute big structures like rolling stocks.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.859-864
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• 2007

The rolling stock which is used the most frequently by public transportation has to secure reliability and safety. In these, vibration is the important factor which causes of serious problem of rolling stock. By the way, rolling stocks vibration test specific activity that is using translating JIS standard is serious mistake, but it is actuality that is used until present more than ten years. Study wishes to analyze problem of standard of domestic rolling stocks and present countermeasure.

• Proceedings of the KSR Conference
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• 2009.05b
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• pp.191-198
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• 2009

There are almost no studies on verification of requirements for high speed rolling stocks by means of RAM goals and on setting RAM goals by means of verification on practical reliability, availability and maintainability for high speed rolling stocks though they are covered in specification of an order that RAM goals asked of rolling stocks are shown for gaining high quality of them and availability when they are in operation. This study is for estimating number of high speed train-sets that would be supplementarily placed an order through verification of RAM goals of a project for the introduction of KTX-II 100 cars. It verify that optimized requirements for high speed rolling stocks by relatively comparison with between requirements for train-sets through setting RAM goals and requirements for train-sets through analysis of prospects for management balance with high speed rolling stocks.

• Proceedings of the KSR Conference
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• 1998.11a
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• pp.505-511
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• 1998

Production technologies for aluminum rolling stocks are mainly related to welding of aluminum alloys. Automatic welding of extrusion profiles and control of welding deformations are the important contents of the production technologies. Another production technology other than welding is the technique for surface treatment of aluminum carbody. In this paper, problems caused during construction of the test carbody are described and the remedies for the problems are suggested. The accumulated experiences and systematic data will be helpful for the mass production of aluminum rolling stocks in the furture.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.198-205
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• 2009

It is known that the operation and maintenance cost is generally higher than the acquisition cost of rolling stocks. It is very important for reducing the operation and maintenance cost to acquire the rolling stocks which are well designed with regard to the operation and maintenance cost. Therefore life cycle cost including the operation and maintenance cost is needed to be considered from the acquisition phase. This article presents a procedure and a model for life cycle cost which are applicable to the acquisition of rolling stocks.

• Journal of the Korean Society of Systems Engineering
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• v.4 no.1
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• pp.31-34
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• 2008

As a supply contract for 100 new high-speed rolling stocks(KTX-II) was made 8th June 2006, System Engineering process has been applied to introduce the high-speed rolling stocks successfully and to manage the total life cycle systematically from Pre-concept Phase, Contract Phase, Preliminary and Critical Design Review, Production, Test and Verification, Acceptance and Operation to assurance for a flaw.

• Proceedings of the KSR Conference
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• 1998.11a
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• pp.489-496
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• 1998

Although the surface of aluminum alloy has good corrosion resistance property, the surface of the aluminum rolling stock should be painted for good appearance and protection of the body. For better painting of the aluminum carbody, the surface must also be well pretreated. In this paper, painting process of the aluminum rolling stock is described and the test results of the painted surface is presented. As accumulated data concerning to the painting technology for the aluminum rolling stocks are absent in our country, the presented test results will be helpful for mass production of aluminum rolling stocks in the near future.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2626-2631
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• 2011

In recent carbody design of rolling stocks, the development of a new carbody structure rather than designing the carbody structure by applying a proven new way to design the carbody structure has been applied. Structural requirements of the carbody being equal, the same applies to the carbody structure means that it is possible to design a carbody structure. By kinematic envelope & speed and the environment, etc., the carbody design is in progress. Accordingly, if all conditions are the same as the existing carbody structure by the same criteria is that you can go get the same. Rather than developing a new carbody structure, carbody structure by applying proven that safety is secured is made possible. Proven standard model of the carbody structure of rolling stocks to secure a new carbody design has made it possible to apply. In addition, the size of the different carbody but structural requirements are the same body design is easier to be expected. In this paper, a model standard carbody of rolling stocks is chosen and of a new carbody design that can be applied to the carbody design will attempt to demonstrate the case.

• Journal of the Korean Society for Railway
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• v.13 no.3
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• pp.257-263
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• 2010

Operation and maintenance cost of a rolling stock is generally higher than its acquisition cost. Therefore, it is necessary for reducing life cycle cost (LCC) to make rolling stocks easy and low costly for operation and maintenance. In addition, their operation and maintenance support systems should be effective and efficient. To accomplish this, operator should specify LCC requirements in the early stage of acquisition and make a contractor to provide the rolling stocks of low LCC. This article presents a procedure and a verifiable LCC model available in the general acquisition process where an operator specify requirements and a contractor provide the rolling stock meeting the requirements.