• Proceedings of the KSR Conference
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1845-1854
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• 2007

기존의 철도용량의 개념은 하루동안 최대한 통과시킬 수 있는 최대 열차 횟수를 기본으로 하여왔다. 그러나 이러한 단순한 최대횟수는 그 사용상의 여러 가지 제한사항을 가지고 있다. 최대열차 운행횟수는 열차의 속도, 신뢰성등과 같이 고려하여야 하며, 이러한 고려는 자연스럽게 서비스수준과 같은 과거철도에서는 구체적으로 고려하지 않던 새로운 용량에 대한 접근을 요구하게 된다. 2004년에 세계철도연맹(UIC)에서 제안한 철도용량 산정절차는 이러한 측면에서 많은 점을 시사하고 있다. 새로운 절차의 한국의 지역간 철도에의 적용가능성을 검토해 본다. 본 연구에서는 2006년 11월 새로 개편된 경부선, 호남선의 열차시간표를 이용하여, 문제가 되고 있는 서울역${\sim}$시흥역 구간에 대해 UIC에서 새롭게 제시한 선로용량의 개념을 OpenTrack을 이용한 시뮬레이션을 통해 적용해보고, 이에 따라 선로 용량 산정시 적용할 수 있는 MOE를 찾아내 서비스수준(LOS)을 결정할 수 있는 방안을 제시해보고자 한다.

• Journal of Korean Society of Transportation
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• 제24권4호
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• pp.93-101
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• 2006

The signalized intersections near highway-railroad grade crossing are operated without signal preemption in Korea when trains are approaching the crossing. This signal operation is very dangerous because queues from the intersection can extend back over the track, thereby creating the Potential for a serious vehicle-train accident. And the queues from the crossing can extend to the intersection with the normal signal operation while trains Pass the crossing. In this case the intersection is disrupted, and delay and the Potential for vehicle accident increase highly In order to improve the intersection performance and Protect the accident the crossings and intersections. signal Preemption designed to provide a special control mode should be implemented. In this study it was shown that intersection Performance near highway-railroad grade crossing improved using signal preemption. When signal Preemption is implemented at the test site, the delay was reduced by about 9sec/veh. Even though there were vehicle-train accidents at the crossing in all 30 simulations without signal preemption. there was no vehicle-train accidents at all when signal preemption is used.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제16권8호
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• pp.5534-5540
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• 2015

This In the railway signaling system, applications of axle counter in addition to track circuit goes on increasing for detecting train position. Consequently, this paper compares sensor methods of axle counter with between geo-magnetism method and proximity sensor method. And it presents differences and results, to improve reliabilities of train detection and axle counting. Also, this article presents an applied result which is based on field experience, with regard to installation, considering attachment condition of sensor part for accurate axle counting. This study acquires expandability that is able to perform not only axle counting function but also various other functions (direction detection of train, speed detection of train, and so on). It was a result of a change of design in order to judge phase difference of sensors, to improve reliability of axle counting. Furthermore, it does not subordinate to characteristics (type, weight of train). And it is confirmed that the omission of axle counting was not occurred in 350km/h. This was the result of Lab test after the construction of transfer equipment of trial axle and Test Bed for axle counting. Both of them are self-productions. Through this, it prepares foundation which is able to apply not only to train detection but also to speed of passing trains, formation number of trains, detector locking condition - when the train passes the section of switch point, and level crossing devices. Furthermore, it would be judged to contribute safety train operation if proximity sensor method applies to the whole railway signaling system from now on.

• Proceedings of the KSR Conference
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.570-575
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• 2004

This paper deals with the exchange of tourists and the operation of sightseeing train encouraged by the inter-Korean cross-border railway project. First of all, how the inter-Korean cross-border railway project has developed will be discussed. After this, the present tourism state, facilities, the state of railways and roads of North Korea, and major tourist attraction around the Kyonguisun will be shown. And then, several aspects on the agreements between the Korean National Railroad (KORAIL) and North Korean railroad system will be summarized. And, finally, the economic effect of the line including the operation schedule of the Kyonguisun sightseeing train, the demand forecast, the computation of railway fare, and profit sharing will be depicted.

• Journal of the Korean Society for Railway
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• 제12권5호
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• pp.700-706
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• 2009

Unlike high-speed KTX trains and dual track railways, most single-track railways are not popular among passengers because of long travel hours. As a solution to the problem, tilting trains will be deployed along the conventional line. Tilting train has a mechanism that enables increased speed on regular and curved railway tracks. As a train rounds a curve at speed, objects inside the train experience centrifugal force. This can cause packages to slide about or seated passengers to feel squashed by the outboard armrest due to its centripetal force, and standing passengers to lose their balance. Tilting trains possess a top speed of up to 180 km per hour as opposed to the previous 140 km per hour, so allow the train to pass curve at higher speed without affecting passenger comfort. This paper describes the methodology study to estimate the benefits, especially on the extra benefits in case of tilting actuation.

• Journal of the Korean Society for Railway
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• 제10권6호
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• pp.735-741
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• 2007

A turnout system which permits trains to pass from one track to another is a combination of the switch, the crossing, lead rails which are necessary to connect the switch and the crossing, two guard rails and a switch machine for operating the switch. In Korea, it has been planned to adopt the high speed tilting train which is suitable for the circumstance of Korea and operates at the maximum speed of 180 km/h, at conventional lines by the year of 2010. For the present, the prototype of the tilting train has been fabricated, and has undergoing a trial run. In this study, evaluation of noise around the turnout system induced by the tilting train has been implemented through the field measurements.

• Proceedings of the KSME Conference
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• 대한기계학회 2003년도 춘계학술대회
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• pp.1875-1880
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• 2003

Measurements of wind flow and pressure fluctuations induced by train passing on station platform have been conducted. Test conventional trains have a different nose shapes - bluff nose and wedged nose. The bluff nose train influence peak value of pressure fluctuations on station platform three times more than the wedged nose train for train speed of 108 km/h. Also, air flow induced by the bluff nose train passing is three times more than the wedged nose train passing. Current study shows that the gust induced by the bluff nose conventional train may threaten a passenger's safety on station platform in proximity to train passage.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제10권2호
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• pp.256-263
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• 2009

KORAIL carries out an improvement project of railway signaling system for the conventional line from the existing method which permits a train to move within limited speed the ground signal of ATS(Automatic Train Stop) system. The proposed system makes possible that a train can be driven using a speed profile created by onboard signaling system(ATP) with the movement authority from ground balise. A driving test over 100,000km is being executed by developing a tilting train for the speed elevation on the conventional line. And, the introduction of the tilting train by ATP system to the Jung-ang line is expected. However, a speed elevation on a curved line section has a restriction. Therefore, research on safety braking model and train separation control technology for the localization of ATP system is required preferentially. In this paper, we presented a safety braking model of ATP system and a train separation control method that use ground balise as variable information provider, and executed a performance simulation.

• Proceedings of the KOR-KST Conference
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• 대한교통학회 1995년도 한-중 국제학술회의 발표논문
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• pp.202-230
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• 1995

0 동북아지역 경제의 급속한 성장과 남북경제교류 활성화로 수송 부문의 발달이 중요성을 더해 가고 있슴 0 그러나 지금까지 남북철도 연결에 관한 논의는 통일 후의 방안 만 고려되었을 뿐, 통일 전 남북철도 연결을 목표로 하는 구체 적 전략이 부재하였고, 특히 해운과의 경쟁력 비교시 철도시스 템에 대한 이해부족이 지적됨 0 남북 및 대륙연결 최적 철도망을 구축하기 위해서는 다음과 같 은 접근 방안이 효과적임 - 남북 철도연결은 순수 경제적 관점에서, 민간기업이 주체가 되어, 중국철도 등을 중개자로 하여 사업을 추진 - 단계적이며 실용적 접근전략에 따라, 1단계로는 경의선 만을 연결하고, 여객취급을 배제하며, 컨테이너 수송만으로 시작하다가, 광물자원 수송 등 확대 - 초기에는 남북간 수송보다는 한국과 중국 . 러시아 간의 컨테 이너 통과수송 취급에 중점 (북한의 수송수입 강조) - 경의선을 따라 남북 군사분계선 근처에 각측의 경계역을 만들 고, 상대촉 파견관의 검색 및 언수에 따라 열차가 휴전선을 통과하여, 반대펀 경계역에 이르면 기관차 및 승무원을 교체 하며, 화차는 일정 기간 이내 되돌려주는 방식 채택으로 남북 철도 시스댐 차이에 따른 기술적 문제 해소 0 대륙철도의 이용은 동북아 권역내 수송에 중점을 두되, E ESCAP의 활동에 따라 TCR,TSR을 이 용한 유럽 및 중동으로 의 수송도 추진하며, 남북 철도연결 추진과 병행하여 열차페리의 도입에 의한 철도- 해운 복합수송 방식의 활성화를 적극 검토활 것이 필요함

• Journal of the Korean Society for Railway
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• 제10권5호
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• pp.492-498
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• 2007

For the running safety assessment of Saemaul train passing through curves, an analysis model for multibody system has been developed. By using this model and ADAMS/Rail, sensitivity analyses depending on the variation of parameters related to the derailment coefficients have been conducted. At low speed, the derailment coefficient and the unload ratio of right wheel showed higher than left wheel, while those of left wheel showed higher than right wheel at high speed. According to decrease of curve radius, the derailment coefficient and the unload ratio were increased. When the length of transition curve was increased, the derailment coefficient was increased but there was no change on the unload ratio. According to the increase of cant, the derailment coefficient and the unload rate were increased.