• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2010년도 춘계학술대회 논문집
• /
• pp.2034-2039
• /
• 2010

As a mass transportation system, a railway contains potential risks that may result in a high death rate and property losses. Accordingly, Railroad Safety Technology R&D Corps. is adopting the plan of the construction of Railway Safety Test Facilities as a part of the Railway Total Safety Project to enhance the railway safety, and carrying out researches on effective project management methods with Systems Engineering techniques. When a system or a service is realized, such as the Railway Total Safety Project, it needs to be verified by requirements and the process of verification is to check whether customers/stakeholders requirements have been properly transformed into a system or a service. Recently, building the standardized verification system up could be the solution to reduce possible system-failed risks. To support that, we propose the more effectual verification method of constructing the Railway Safety Test Facilities applying the systems engineering tool to the research.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 추계학술대회 논문집
• /
• pp.1871-1876
• /
• 2007

To establish the national railway safety system, the railway total safety technology development project has been promoted by Ministry of Construction and Transportation (MOCT) since August 2004. The project has producted successful results in many areas of railway safety, however, it is required that the research field should be re-examined to meet the aim of the project. To do that, the precedence of the investment of research resources should be reviewed and determined. The risk of serious railway accidents such as train collision, derailment and level crossing accidents are estimated. From the estimation result and the statistics on the railway accidents over fast few years, the risk factors of railway accidents can be calculated.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2014년도 추계학술대회 논문집
• /
• pp.812-816
• /
• 2014

Recently, there is an increasing interest on railway noise and vibration. Accordingly, the importance of technology that can assess the vibration and structural noise caused due to the railway operation is increasing. Additionally, the need to construct a railway noise and vibration database which is a basic data for a reliable railway noise and vibration assessment as well is increasing. However, the problem is that the currently constructed database fails to include the factors influencing the occurrence of noise and vibration sufficiently. Therefore, In this paper, design a railway noise and vibration database that includes those factors sufficiently and which enables the continuous data management and accumulation.

• 대한안전경영과학회지
• /
• 제12권4호
• /
• pp.175-181
• /
• 2010

The government have plans to improve the railway transport capacity and transport hub for the sustainable national transport and logistics system. Specially, there are much efforts to improve transportation capacity such as high speed transportation of rail freight, enlargement of BT train, development of double stack train, etc. between railway transport hubs. If the transport capacity between railway logistics hubs is increased as planned, we must increase the handling capacity of railway hub terminals. But there are limits to enlarge the terminal infrastructure because of investment scale, location circumstances and urban development plans. To ensure the capacity, with the minimum required enlargement of infrastructure, it is necessary to extremely increase the efficiency of terminal operations. For improving the efficiency, we have to introduce the efficient terminal operation systems based on u-IT and operation optimize technologies. In this paper, we analyse the issues and problems of railway terminals(including ICD) and suggest the concept of intelligent railway terminal and the construction components of technology.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2006년도 추계학술대회 논문집
• /
• pp.1146-1151
• /
• 2006

The railway industry came at specialization of railway, high speedization and internationalization age recently. For this national railway technology competitive power of improve and need human strength training through special and expansive railway education that can meet in change. Also, request about professional manpower of other wide field by internationalization beside existing railway major person, pointed end anger is judged to be increased. Will present education system improvement way that can grope activation of education for specialization and internationalization of railway human strength through research of railway e-learning education in this research.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2008년도 추계학술대회 논문집
• /
• pp.1964-1969
• /
• 2008

A railway is a complex system integrated with a lot of technical elements such as rolling stock, power, signal control, communications, tracks, stations, operation control systems, and so on. As a mass transportation system, a railway could contain potential risks that may result in a high death rate and property losses. Accordingly, Railroad Safety Technology R&D Corps. is adopting the plan of the construction of Railway Safety Test Facilities as a part of the Railway Total Safety Project to enhance the railway safety, and carrying out researches on effective project management methods with Systems Engineering techniques. To support that, we propose the more effectual management method of constructing the Railway Safety Test Facilities applying the model-based systems engineering tool to the research.

• 무역학회지
• /
• 제44권4호
• /
• pp.153-168
• /
• 2019

The logistics industry is changing with the diversification of demand and related technology development. Thus, the transportation system is also changing to social problems and environmental damage, and the importance of rail freight is increasing with changes in the international logistics environment. This study analyzes railway freight competition structure using freight volume and suggests improving the competitiveness of railroad freight. To achieve the research purpose, this study was conducted using the Hirshmann-Herfindahl Index(HHI) and Location Quotients(LQ) method. As a result, the concentration trend of railway trends has increased from 0.213 to 0.238 during the last 9 years, and LQ analysis has enabled the identification of local competition lines by item. The study result confirmed that policy measures on railway freight system, railway infrastructure construction and railway operation are necessary to enhance railway competitiveness.

• 전력전자학회논문지
• /
• 제20권6호
• /
• pp.573-579
• /
• 2015

A control algorithm of thyristor dual converter power system is proposed in this study for a railway power substation. The thyristor dual converter can use regenerative power without an additional system using control algorithm. An autonomous voltage and mode change method is also proposed to provide uninterrupted power to the railway. A 10 kW reduced model of the thyristor dual converter power system is built and tested to verify the validity of the proposed control algorithm.

• International Journal of Railway
• /
• 제9권1호
• /
• pp.15-20
• /
• 2016

An approach section on an abutment is located between the soil embankment and the structure, which may cause an uneven surface due to different settlement between the abutment and the soil embankment. This study proposes a new type of wall which separates the abutment from the backfill material using mechanically stabilized wall. A new type of keystone which incorporates geotube and wire mesh is proposed and evaluated. Numerical analyses were performed to investigate the applicability of the proposed keystone type, which incorporates Geosynthetic. The maximum horizontal displacements along GRS wall faces, settlements at the top of pavement and track bed, and tensile forces applied on geotextiles under traffic loads were investigated. The results of the numerical analysis showed that the proposed wall can be used for highway and high-speed railway abutment.

• 한국산학기술학회논문지
• /
• 제14권10호
• /
• pp.5148-5155
• /
• 2013

전기철도와 인접하여 병행 설치되어 있는 전기통신선에는 전자유도현상에 의한 유도전압이 발생하여 통신장애 및 안전사고가 발생할 수 있다. 이와 같은 유도장해를 경감시키고 통신신뢰성을 확보하기 위하여, 차폐케이블의 적용과 함께 최근 추진되고 있는 복선전철화에 따른 영향을 검토할 필요가 있다. 본 논문에서는 AT급전방식 전기철도에서 인근 통신선에 유기되는 유도전압에 영향을 미치는 각종 인수 및 산출식을 검토하고, 유도전압 발생 예측치를 시뮬레이션을 통하여 정량적으로 분석하였다. 시뮬레이션 결과, 복선철도에서는 단선철도에 비해 통신선 유도잡음 전압이 18[%] 정도 감소하여 타궤조 효과가 영향을 미치는 것으로 나타났다. 또한, 복선철도를 기준으로, 50% 차폐 통신케이블에서는 유도잡음전압이 1/8로 감소하였으며, 15% 차폐통신케이블에서는 1/15로 감소함에 따라 차폐효과가 크고 유도잡음전압 영향을 최소화할 수 있는 것으로 나타났다.