• Journal of the Korean Society for Railway
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• v.15 no.6
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• pp.670-681
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• 2012

In this paper, we review a variety of state-of-the-art research on assessment of the railway track capacity. We address the three well-known methods (Yamagishi, UIC 406, and TCRP-13) with individual case study in this research field. First, we explicitly present every derivation-step of the Yamagishi equations that has been most frequently applied in the Korean railway without clear understanding for it. Further, we present a prospective application scheme of the method as an analytic assessment method. Second, we address establishing process of UIC 406 standard and its application method, which is known as the standard method in Europe. Finally, we address the method and application of TCRP-13, and present comparison between the three methods. This paper is expected to contribute for improving understand on the in-using equations and methods in practice as well as for activating application of the internationally well-used method to the Korean railway.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.6
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• pp.1025-1032
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• 2017

In this paper, the level of service (LOS) is defined for high-speed railway links and rolling stocks. Based on this LOS, how to manage high-speed railway facility is also suggested. The LOS is divided into 6 levels from A to F. The measurement of effectiveness (MOE) for railway links is derived from the relationship between a total delay time and a railway link utilization ratio. Another MOE, volume over capacity (V/C), is also proposed. On the other hand, the LOS for high-speed railway rolling stocks is based on the density of people in a rolling stock. Above all, LOS D is defined to the total number of seats. Then, LOS A is 50% of the LOS D, LOS B is 70% of the LOS D, LOS C is 90% of the LOS D and LOS D~F is defined as the maximum seats and standing people at the level of each. Finally, a method to manage high-speed railway links and rolling stocks is proposed in order to keep the level of service at the target by the government.

• Proceedings of the KIEE Conference
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• 2001.07d
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• pp.2690-2692
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• 2001

철도에서 선로용량은 선로의 신설이나 개량 또는 열차운용을 위한 스케쥴 작성에서 필수적인 용량한계의 측도 이다. 특히 선로를 신설하거나 개량할 때 선로용량은 주어진 사업비에 대해 각각의 안을 비교해 볼 수 있는 중요한 측도 이다. 이 논문은 기존의 선로를 개량하고자 할 때, 사용할 수 있는 선로용량의 거시모형을 제시하고자 한다. Jan C. Fransoo(2000)는 이 분야에 대한 선행연구를 수행한바 있다. 여기서는 네덜란드의 선로를 대상으로 2가지 속도종별의 선로용량에 대한 해석적 모형을 제시하였다. 이 논문에서는 선로용량의 모형을 3가지 이상의 속도종별에 대해 고려하는 연구결과를 제시한다.

• Proceedings of the KSR Conference
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• 2006.05b
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• pp.917-917
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• 2006

• Proceedings of the KSR Conference
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• 2002.05a
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• pp.163-173
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• 2002

우리의 교통시설은 선진국에 비해 양적 질적으로 크게 부족하며 철도는 더욱 열악한 실정 o 경쟁시설인 도로와의 적정 역할 분담정도를 시사하는 도로와 비교한 철도의 수송분담율이 유럽의 1/2 수준 o 철도연장이 부족할 뿐만 아니라 운행속도가 낮고 다수의 미연결구간과 노선별ㆍ구간별 용량차이로 운행이 비효율적(중략)

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.694-698
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• 2005

The operation speed improvement of the train in electric railway must pursue continuously and need the investigation of whole railway system whole. The high-speed of the train is related to not only vehicle technique but also the infrastructure, signal system, operation technique, the trolley line and catenary, economical efficiency. Specially, in case of electric railway, we have to consider a technical investigation which is current collection efficiency improvement, voltage drop countermeasure, equipment capacity, track force, signal system. In this paper, we presents the technical investigation of AT feeder system in order to achieve high speed train in exist real railroad. We proved this approach which will use the whole domestic lines in the future.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.5D
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• pp.735-740
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• 2008

The Design manual for adjusting the capacity and LOS of facilities has been shared in urban railways and high-speed railway stations. However, the pattern of urban railways users and those of high-speed railway users are different from each other. For an example, the high-speed railway users tend to carry voluminous luggages and the transportation disadvantaged such as children and the elderlies. Accordingly, we see that the scale of facilities and the station itself should be constructed differently. The transfer facilities in the high-speed railway stations are classified widely into walking assisting facilities and convenient facilities. We invented the concept of PME (Pedestrian Moving Equivalent) and PWE (Pedestrian Waiting Equivalent)for the spatial calculation of those who are with wheeled luggages, back packs, and children to reflect the uniqueness of users in high-speed railway stations. These equivalents have been applied to the design of the facilities to asses the new Capacity and LOS that are users' favored.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.7-13
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• 2011

Simulation study were performed for ventilation capability effect on the smoke spread in the deeply-underground subway station(DUSS). Singeumho station(The line # 5, Depth: 46m) was modeled and were analyzed for smoke-spread speed difference between the originally-designed-ventilation-capacity and the measured-ventilation-capacity. Field test data for actual fan in DUSS was applied as a boundary condition of a simulation. The whole station was covered in this analysis and total of 4 million grids were generated for this simulation. The fire-driven flow was analyzed case by case to compare the smoke-spread effects. In order to enhance the efficiency of calculation, parallel processing by MPI was employed and large eddy simulation method in FDS code was adopted.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.209-211
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• 2020

운송기관의 온실가스 저감을 위해 배터리-수소연료전지 하이브리드 철도추진시스템에 대한 연구가 활발히 진행되고 있다. 이 중 배터리는 빠른 응답 특성으로 하이브리드 철도추진 시스템의 효율을 극대화 시키기 위해 주요 전원으로 사용되고 있어, 시스템의 안전성 및 신뢰성을 높이기 위해 정확한 열화추정이 요구되고 있다. 본 논문에서는 사전 모델의 수립이 필요하지 않고 미소 용량 및 폐회로 제어가 가능한 재귀 최소제곱 추정 기법을 이용한 리튬이온 배터리의 SOH 추정 기법을 제안하였으며, 1S18P 배터리 모듈을 통해 열화 추정결과를 검증하였다.

• Proceedings of the KSR Conference
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• 2006.05b
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• pp.330-334
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• 2006