• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2987-2997
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• 2011

As a public transit playing an important role in the era of high gas prices, subway corresponds the national strategy 'Low carbon, Green growth'; accordingly, passengers who would use the transportation are steadily increasing. Subway operators are required to provide subway users with services based on higher-quality system, safety, convenience & high reliability level. Furthermore, as the legally allowed maximum life time of EMUs is extended, it is necessary to localize & standardize the parts of EMUs. This paper presents a modelling of systematic EMU(SR001) manufacturing technique which enables us to reflect passenger and subway operator's demands in the whole EMU manufacturing process from the initial design phase to its completion by making full use of the know-how based on subway operators' experiences. SR001 enabled SMRT's staffs to participate in the EMU design & its equipment manufacturing; consequently, it realized the innovative system which meets passengers' requirements. Moreover, the process lead time was reduced dramatically. The result of this research will be helpful in providing useful guidelines for railway industry policy and development making in Korea.

• 기술사
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• 제30권4호
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• pp.88-98
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• 1997

대중교통환경을 개선하기 위하여 신교통시스템의 도입이 요구되고 있다. 신교통시스템이란 첨단과학기술에 의해 자동운전과 저렴한 운행비 및 유지관리비를 구현한 제반 시스템을 말한다. 이러한 신교통시스템중에는 무궤도와 궤도에서의 운행이 가능한 궤도버스시스템이 있는데, 본 연구에서는 궤도버스시스템의 특성을 조사하고 이용자측면과 운영자측면에서 평가하였는데, 결론적으로 궤도버스시스템은 환승을 줄일 수 있고 초기투자비가 저렴한 시스템이며, 노선의 승객수요가 방향별 시간당 승객수(PPHPD) 5,000~39,600사이에 있는 노선, 즉 버스와 지하철사이의 승객수요가 있는 노선에 적합함을 알 수 있었다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2004년도 추계학술발표회
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• pp.95-100
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• 2004

이 연구에서는 낙도보조항로의 운영실태와 발달과정에 대하여 정리하였다. 낙도보조항로는 14개 사업자가 27개 항로에서 총 30척 선박으로 낙도주민을 위한 안정적인 생활교통편의를 제공하고 있다. 항로별 수송실적을 분석한 결과, 전체적으로 이들 항로를 이용하는 여객 수도 매년 증가하는 추세에 있다. 선박 이용자의 서비스 만족도를 향상시키려고 한다면 운영사업체별로 경영평가제를 도입하는 등 보다 구조적인 변화가 요구된다. 본 연구를 통하여 얻어진 결과들은 낙도보조항로 중장기 발전방향 수립에 기초 자료로 활용하는 데 그 의미가 있다.

• 한국철도학회논문집
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• 제3권3호
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• pp.117-124
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• 2000

The rubber wheel-type AGT has two major kinds of bogie; one is the bogie type and the other steering one. Both are important vehicular structure to support the whole running vehicle and passenger loads. This paper deals with the static analysis for the two types of bogie frame subjected to combined external forces, as well as independent ones specified in UIC 515-4. Furthermore, the dynamic analysis is performed under vibrational loading conditions so as to compare dynamic characteristics, Numerical results by using commercial packages, I-DEAS and NASTRAN show that maximum stresses do not exceed the yield strength level of material used for both bogies. From an overall viewpoint of strength, the bogie type turns out to be superior to the steering type except for the case of a lateral loading. It is also observed that the steering type shows a characteristics of low frequency behavior during a course of searching for structurally weak areas to be stiffened. The vibrational fatigue analysis for each bogie frame depends on the loading time history conditions which is applied. Time History Central Database List in the NASTRAN package. Subsequent1y, the fatigue life of bogie type is longer than the steering type.

• World Technopolis Review
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• 제3권3호
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• pp.139-152
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• 2014

The current transportation regime is largely based on two alternatives: (1) fixed route public transit, and (2) private ownership of internal combustion engine (ICE) powered vehicles per households. This paper analyzes one possible transportation alternative, Micro Electric Vehicles or MEVs, and compares with the ICE vehicles in terms of social, economic and environmental benefits, especially emphasizing its environmental advantage over ICE vehicles for future sustainability. While some representative models of MEVs exist in a limited market capacity, but global technical standards are generally insufficient and non-homogenous across nations, which restricts the development of the proposed transportation sector. The focus of this paper is to analyze the characteristics and potential benefits of MEVs in economical and environmental perspectives, including development status and technical standards, with a particular focus in the E.U., the U.S., Japan, and Korea. Based on the data of analysis, this paper aims to derive and propose a cooperative and adaptive global policy framework designed to speed up adoption and expansion of the global MEV market, including passenger and utility vehicles. We propose MEV to be a new mobility segment in the global transportation market because of their advantage in environmental impact, sustainability, overall cost of ownership, and safety.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.761-772
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• 2009

The introduction of KTX (Korea Train eXpress) provided passengers with a much faster mode of transport, and KTX has become a model railway system. Express railway stations are emphasized as public transit transfer centers, but their service evaluations were not performed appropriately so far. It is possible to know the level of service by developing valuation criteria for their evaluations. The evaluation of transfer centers mainly consists of two parts; connective service with other travel m odes, and transfer service inside transfer stations. Connection is defined as the inter-connection of multi-transportation vehicles, and transfer means that a passenger changes his travel mode to another. Such connective service and transfer service are evaluated by the level of service in terms of transfer facilities, the appropriateness of station layout and the quality of information throughout the facilities. We developed the service evaluation indicators of connective facilities and referred to the indicators of transfer facilities. We examined the 7 stations in Korea that are currently in operation and standardized the methodology of the evaluation process by applying the indicators suggested in this study.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 창립기념 춘계학술대회 논문집
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• pp.172-183
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• 1998

The purpose of this study is to reduce the number of employees hired by Seoul Metropolitan Subway Corporation(SMSC) as a way of responding to deteriorating financial deficit problem. For the reduction, the personnel structure of Seoul Metro Rapid Transit Subway(SMRTS) newly founded in 1995 is benchmarked. Several assumptions are set for seeking the persuasive alternative; 1) no compulsory reduction of existing personnel, 2) raising the salary of SMSC to the same level of SMRTS for compensating intensified work burden, 3) hiring new employees to the amount of one-third of the reduced workforce for minimizing the problems associated with the reduction. The study suggests that the personnel reduction in relevant parts be planned in the following ways; 1) passenger transport part: from daily 3 shifts of 4 group to 2 shifts of 3 group, 2) fleet inspection, civil d: electric engineering, railtrack maintenance, signal parts: from 12 day-off to 10day-off, 3) architecture, AFC parts: from 2 shifts of 3 group to daily work, 4) fleet maintenance, architecture parts: expanding out-sourcing ＆ automation, and 5) headquarter part: 10% reduction of the total of office workers. The study finds, by implementing the plan, that 1,270 employee can be reduced, and that aggregate 106.8 billion won will be saved for the next 10 years.

• 한국암반공학회:학술대회논문집
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• 한국암반공학회 2008년도 국제학술회의
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• pp.33-41
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• 2008

The longest tunnel has been halted at Daekwanryung by the failure of the host country of the Winter Olympiad in 2014, but modern High-Power TBM will come to Korea to excavate these long tunnels to establish the better horizontal connection between the western and eastern countries to improve the strong powerful logistic strategy of Korean peninsula. Train operation provides a key function of air movements in a long underground tunnel, and heat generation from transit vehicles may account of the most heat release to the ventilation and emergency systems. This paper indicates the optimal fire suppress services and safety provision for the long railway tunnel which is designed twin tunnel with length 22km in Gangwon province of Korea. The design of the fire-fighting systems and emergency were prepared by the operation of the famous long-railway tunnels as well as the severe lessons from the real fires in domestic and overseas experiences. Designers should concentrate the optimal solution for passenger's safety at the emergency state when tunnel fires, train crush accidents, derailment, and etc. The optimal fire-extinguishing facilities for long railway tunnels are presented for better safety of the comfortable operation in this hard rock tunnel of eastern mountains side of Korea. Since year 1900, hard rock tunnel construction has been launched for railway tunnels in Korea, tunnels have been built for various purposes not only for infrastructure tunnels including roadway, railway, subway, and but also for water and power supply, for deposit food, waste, and oils etc. Most favorable railway tunnel system was discussed in details; twin tunnels, distance of cross passage, ventilation systems, for the comfortable train operations in the future.

• 한국철도학회논문집
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• 제15권3호
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• pp.278-285
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• 2012

경전철 민자사업에서는 서비스 품질에 대한 핵심성과지표(KPI)로서 승객관점에서의 서비스가용도가 사용된다. 그러나 국내 경험이 부족한 서비스가용도는 목표 값 설정 시 많은 논쟁이 발생되어 왔다. 서비스가용도 목표값은 시스템 사양서 및 운전운영계획에 반영하기 위하여 프로젝트 초기단계에 설정되어야 한다. 따라서 본 논문에서는 경전철 프로젝트 초기단계에서 합리적으로 달성 가능한 서비스가용도 목표 값을 설정하기 위하여 서비스가용도를 정량적으로 예측할 수 있는 예측모델을 개발하였다. 또한 서비스가용도 목표 값 설정 시 가장 많이 비교되는 열차 정시성을 이론적으로 모델링하여 서비스 가용도와 열차정시성과의 관계와 차이점을 분석하였다.

• 대한교통학회지
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• 제29권1호
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• pp.81-93
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• 2011

본 연구는 다수단 교통망에서 교통시설 운영자와 이용자의 상호 의사결정과정을 고려하여 교통시설의 건설 및 운영 정책 문제를 해결하기 위한 다수단 연속형 교통망 설계문제를 다룬다. 특히, 교통시설에 대한 정책변화에 따라 교통수단간 통행이 어떻게 변화하는가를 고려하기 위하여 승용차 교통망과 대중교통 교통망을 함께 고려하고자한다. 이러한 교통망 설계 모형을 개발함에 있어서 일반적인 Nash 균형(비협력 게임)의 접근법이 아닌 좀 더 합리적이라고 연구되어진 Stackelberg 균형(협력적 게임)의 접근법을 이용하고 그러한 방법으로 다수단 교통망의 교통수단 선택을 고려한 민감도 분석 방법을 적용한다. 본 연구의 다수단 연속형 교통망 설계 모형은 교통정책 결정에 대한 임의의 연속형 교통망 설계변수(${\epsilon},\hat{\epsilon},p$)에 대해서 개발되어진다. 또한 모형의 적용 및 평가를 위하여 1)도로 정책에 대한 최적 도로용량 산정과 2)대중교통 정책에 대한 최적 대중교통 노선빈도 산정 그리고 3)교통체계의 수단분담 정책에 대한 현 교통체계의 최적 목표 수단분담율 산정 문제에 모형을 적용하여 본다.