• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.773-790
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• 2009

본 연구의 2004년 4월 서울 $\sim$ 부산의 고속철도 1단계 개통으로 기존 육상교통수단의 변화와 역세권 중심으로 생활권의 패턴변화가 발생하고 있다. 고속철도 개통으로 서울 $\sim$ 부산구간 통행시간이 4시간 10분에서 2시간 40분으로 단축되어, 이로 인한 인구의 이동, 기업이 입지, 공간구조의 개편 등 수단선택의 행태변화가 발생하고 있다. 본 연구는 서울 $\sim$ 천안/아산, 서울 $\sim$ 대전, 서울 $\sim$ 대구, 서울 $\sim$ 부산을 대상으로 고속철도 개통 후 발생하는 수단선택의 형태변화을 조사하여 이로부터 향후 수단선택에 영향을 미치는 인자를 분석하고자 한다. 이러한 1 단계의 고속철도 개통으로 인한 대상지역의 수단선택의 행태변화를 분석하여 향후 정부고속철도 2단계, 호남고속철도 개통으로 인한 거리별, 지역별, 수단별 형태의 변화 분석을 통해 정확한 수단변화를 통하여 도시공간구조개편, 광역교통체계의 계획시 좀 더 정확한 분석을 수행 활 수 있을 것으로 기대된다.

• 한국철도학회논문집
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• 제18권6호
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• pp.533-542
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• 2015

본 논문은 도시철도 전동차 정차 시에 발생하는 회생전력으로 인해 전차선 가선전압 상승 시에 Converter(Forward)에서 Inverter(Reverse)로 mode 변환하여 상승된 가선전압을 AC 모선으로 환류하여 전차선 전압을 일정하게 유지하고 전동차 정차 시에 발생하는 회생전력을 재사용할 수 있는 부산도시철도의 더블 컨버터 직류 변전설비를 제안하며 전차선 직류전압 품질향상을 위해 부산도시철도 더블 컨버터 직류 변전설비에서 발생하는 Converter/Inverter mode 변환 시의 undershoot와 overshoot를 최소화할 수 있는 최적의 사이리스터 점호각을 시뮬레이션을 통하여 제시하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.485-490
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• 2005

With the historical opening of the express rail, Korea has joined the league of France, Japan, Germany and Spain and entered into the super high-speed train era. Opening of the express rail will not only bring about enormous changes to the lives of Koreans, but it will also have a huge influence on the economic, social and cultural aspects of the country. With construction of the Seoul - Busan KTX line, railway passenger transportation capacity and freight transportation capacity will increase. Fast, safe, convenient and environmentally friendly, the express rail is a product of the latest technology and will secure its position as the newest and most preferred method of transportation for the next generation. As the traffic noise, train noise from KTX will become a social problems with the acceleration of speed and increase in the lines. In order to predict the train noise propagation from KTX, this paper presents the sound source system, the calculation model and the scale model experiment. Noise level unit patterns of a KTX that take the rolling noise, the motor noise and aerodynamic noise into consideration are simulated by the scale model experiment and numerical analysis.

• 한국전자통신학회논문지
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• 제13권6호
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• pp.1161-1168
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• 2018

2018년 4월 27일 역사적인 남북 정상의 판문점 선언을 통해 남과 북은 철도연결을 위한 실질적인 대책들을 마련해 나가기로 합의하였다. 상상이 현실이 되어 당장이라도 부산-유럽 간의 열차가 운행될 것처럼 연일 보도하고 있지만 남한에서 출발한 열차가 북한 철도로 직결 운행하고 대륙철도로 국경을 통과하는 운영노선은 지금까지 한국철도가 취급해보지 못한 미지의 영역으로 본격적인 운행을 위해 상당한 부분을 면밀히 검토해야 한다. 또한 철도교통은 타 교통수단과 달리 종합적인 네트워크 시스템으로 서로 다른 철도망의 직결운행을 위한 표준화와 기술적 조화가 매우 중요하다. 본 논문에서는 남북철도 연결대비 직결운행을 위해 철도 상호운용성에서 주도적인 역할을 하고 있는 유럽사례를 살펴보고, 이를 통하여 남북철도 직결운행을 위한 실질적인 상호운용성 확보에 대하여 고찰하였다.

• 수산해양교육연구
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• 제23권2호
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• pp.244-252
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• 2011

This study was carried out through survey based on job candidates of marine-bio, marine logistics, and GIS in order to train the human resources with the IT combined ability in the field of fisheries and oceans in Busan. Also, it included the survey on the field of the human resource development which businesses require in Busan. The analysis showed that food industry was most preferred by job candidates and the most required efforts for self-development to employ was to improve their English skills. The most preferred area was Busan and their salary requirements were in the 25 million to 30 million Won range. In findings on survey of businesses, businesses showed a profound interest in HACCP qualification in sea food and logitics manager qualification, and thought that the abilities that job candidates must have were communication and creativity rather than major and skills.

• 대한기계학회논문집A
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• 제21권5호
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• pp.727-734
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• 1997

In practice, the design of forging processes is performed based on an experience-oriented technology, that is designer's experience and expensive trial and errors. Using the finite element simulation and the artificial neural network, we propose an optimal die geometry satisfying the design conditions of final product. A three-layer neural network is used and the back propagation algorithm is employed to train the network. An optimal die geometry that satisfied the same between inner extruded rib and outer extruded one is determined by applying the ability of function approximation of neural network. The neural networks may reduce the number of finite element simulation for determine the optimal die geometry of forging products and further they are usefully applied to physical modelling for the forging design.

• 한국철도학회논문집
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• 제7권4호
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• pp.332-338
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• 2004

The two projects about the high speed train have been performed in Korea, one project is the commercial run of high speed train(KTX) from Seoul to Busan and the other is the development of original high speed train(HSR 350x). As the successful results, the service run of KTX had been launched on the 1st of April, 2004 and HSR 350x had been fabricated in June, 2002 and has been tested in the Kyoungbu line and Honam line since then. The railway has the track irregularities which cause vibrations, such as rail joints, turnout, level crossing, transition curves and super-elevation ramps, and variations in the track level(z-axis) and the gauge(y-axis). Generally, the ride comfort for railway is evaluated by using the vibrations. In this paper, the ride comfort indices according to mc 513R and ISO 10056 have been reviewed when the high-speed trains are operated on both Kyoungbu line and Honam line. Also, the ride characteristics for KTX and HSR 350x on the high speed line and the conventional line have been analyzed and evaluated. The results show that the high-speed train has no problem from the viewpoint of the comfort ride on the high speed line and the conventional line and the ride index for HSR 350x is same as that for KTX in the high speed(300 km/h).

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.423-429
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• 2004

The concurrent engineering technologies have been broadly used in the field of the design, testing, manufacturing and maintenance works to reduce development time and costs. For this purpose, many design environments with the product data management system, the virtual engineering system and web database system are developed. In this research, we developed the driving simulator of the KTX(Korea Train Express) as a basic study for building the concurrent engineering design environment of rolling stock. The virtual track was developed from the Seoul to the Busan and the Daejeon to Mockpo to generate immersible driving environment. Also. fault generation systems were developed to educate drivers of the KTX. We expect to reduce the time and costs of newly developed rolling stock using the design environment developed in the research.

• 한국소음진동공학회논문집
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• 제25권4호
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• pp.266-274
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• 2015

Vibration exposure of domestic high speed trains(KTX and ITX-saemaeulho) to passenger traveling on the Gyung-Bu line was measured to evaluate health effect which is based on ISO 2631-1. The vibration exposure was compared with the frequency weighted root mean square(r.m.s.) and vibration dose value(VDV) of the two trains’ vibration. It is concluded that vibration exposure of the two train during round trip of Busan-Seoul in single day is evaluated to be safe for the passenger’s health according to the health guidance caution defined on ISO 2631-1. Futhermore KTX’s vibration exposure is found to be significantly lower than ITX-saemaeulho thanks to lower vibration magnitude as well as shorter trip time.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.810-815
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• 2010

Since a long time ago, many railway engineers analyze and discuss the interface between the sub-system of railway, such as a wheel/rail interface, pantograph/catenary interface etc. The verifying of the system interface could help to achive the optimized performance and safety of the railway system considering that the railway system is constructed by various engineerings, such as civil, mechanical, electrical, etc. A rolling stock with distributed drive system, which will be developed by HEMU-400x project, is capable of running on high speed line and conventional line in Korea. To verify the performance of rolling stock, test run will be done with revenue service line. And the test items of the system interface have to be selected to verify a functional compatibility and physical force between rolling stock and infrastructure. In this paper, the authors will indicates the test items to verify system interface. To achive the conclusion, the authors analyze a specification of the development train and the design value of Seoul-Busan high speed line, which will be used for testing of the development train, and also, study the various case of high speed train commissioning.