• Proceedings of the KSR Conference
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• 1998.05a
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• pp.466-473
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• 1998

LRV(Light Rail Vehicle) is one of the most useful way for urban transit. HDPIC has designed and manufactured the LRV train set for Manila Line 1 expansion. The LRV is composed of two carbody sections which are coupled by a articulated bogie. The articulated bogie and two motorized bogies have slewing rings in order to improve the curving performance and ride quality. Carbody structures are mainly made of low-carbon stainless steel (STS301L), and the carbody bolsters and draft sills are made of rolled steel for welded structures. The authority's specifications specified the design load conditions and weight limits. Design load conditions are vertical load, compressive load and diagonal jacking, and the maximum axle load is 10.7 ton. In order to meet those requirements, the stiffness and strength of carbody structure were predicted using finite element analysis during design stage. The half or full structure is modeled and analyzed with design load conditions, and critical areas are analysed in detail using sub-modeling method. The strength and strength of carbody structure was also verified by the load test. The analysis and test results show a good agreement.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2007.10c
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• pp.31-35
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• 2007

풍수지리학은 인간이 자연 속에서 좀 더 건강하고 안락하게 살아갈 터를 구하는 동양의 지리관이며 실용학문이다. 경전에 의해 전승된 전통풍수학의 이론체계 중 이기론(理氣論)은 산과 바람, 그리고 물의 순환궤적과 양을 나반(羅盤)를 이용하여 혈(穴)을 찾는 과정으로 땅의 기운을 12단계의 자연순환원리고 구분하고, 88향법(向法)으로 방위를 가늠하여 좋은 터를 선택하는 객관적이며 논리적인 자연환경분석체계임이 고찰되었다. 이러한 맥락에서 이기론의 12순환체계(胞胎法)에 의한 88향법 논리를 방위론에 입각하여 최적화한 다음, GIS분석 틀을 원용하여 사례대상지의 적지분석 결과와 풍수 향법의 결과치를 비교 분석해 본 결과, 88항볍의 적용으로 보다 융통성있는 향과 부지를 선택할 수 있음이 유추되었다. 장차의 연구로서 최적화된 88향법의 풍수논리를 중심으로 보다 다양한 변수의 적용과 면밀한 사례분석이 요구된다.

• Journal of the Korean Society for Railway
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• v.3 no.2
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• pp.92-99
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• 2000

Composites are very useful material for light train carbody due to its high specific strength and lightweight characteristics. The composites, called 3-D board, are developed with a special stitching method. In this process, the glass fiber fabrics of skin material and foam core material are stitched together with glass fiber thread. The glass thread in Z-axis turns into FRP form. The conventional delamination problem can be solved with 3-D sandwich structure. In addition, with the lower density of foam, the weight of the panel and the operation expenses can be highly reduced. To evaluate the usefulness of the 3-D board, the double-deck light train carbody is studied. The stress analyses are carried out under various loads and boundary conditions with FEM Code, ANSYS. On comparing with the aluminum carbody, 3-D board carbody can be reduced by about 2 ton for the total weight of carbody.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.158-163
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• 2006

The study of this study is to suggest the advanced vision of LRT O&M through comparing the domestic and japanese. Currently local government attract a private capital to construct the LRT competitively. It was investigated the O&M field participation of Light Rail Transit by the Seoul metro which operates Seoul subway 1,2,3,4 lines at this time. But, according to the restricted operation experiences in domestic, Japanese companies which operates a Light Rail Transit in Japan were analysed using several statistics. It were compared with operation plan of domestic execution design phase of representative 4 lines. The analysis gives us some points in common and suggestions that are very important and prerequisite for advancing seoul metro into LRT O&M business.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.233-234
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• 2009

2012년 상용화가 목표인 국내 위그선 개발은 화물운송과 여객운송에 큰 변화를 가져올 것으로 판단된다. 특히 부산은 일본과의 여객에서 수요가 클 것으로 판단되며 이에 2012년 이후 상용화에 위그선 터미널 등 관계시설을 계획할 필요가 있지만 현재까지 북항재개발계획에 포함시키자는 단순 논의만 있을뿐 뚜렷한 계획이 없는 실정이다. 위그선의 경우 속도가 빨라서 현실적으로 북항지역에 터미널을 생성시 어려움이 있을것으로 판단되며 이에 현재 영도 동삼동 크루즈터미널이 북항재개발 지역에 신규 크루즈터미널이 만들어진 후 여유가 있을것으로 판단되어 이를 활용화할 필요가 있다. 이률 위해 영도 태종대와 롯데월드를 잇는 관광벨트와 부산역과 연계된 열차화물수송을 적극 활용할 수 있게 영도 경전철을 고려해 볼 필요가 있다.

• Proceedings of the KIEE Conference
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• summer
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• pp.1325-1327
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• 2004

인구가 증가하면서 인간의 생활활동 범위가 증가되었고 이에 따라 운송시스템에 대한 수요가 크게 증대되고 있다. 그러나 물류 이동에 필요한 여러 가지 제반시설은 이를 충족시키지 못하고 있으며, 이로 인하여 현재 국내의 물류수송효율은 최악의 상황에 직면해있다. 이로써 대용량의 수송능력을 담당하는 철도차량 운송 시스템에 대한 수요가 급증하게 되었다. 따라서 이에 대비하고자 많은 신규 노선을 계획하고, 이와 함께 신설되는 노선에 대해서는 시스템 운영 효율의 극대화를 위해 노선별로 고속전철과 지하철, 경전철, 틸팅차량, 그리고 자기부상열차 시스템 등 여러 가지 방식이 검토 중에 있으며 차량에 가장 적합한 추진시스템을 설계하는 것이 차량의 성능에 크게 향상시킬 수 있다.

• Proceedings of the KIPE Conference
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• 2010.11a
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• pp.62-63
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• 2010

This paper presents a potential for application of Inductive Power Transfer(IPT) to the light railway vehicle system. IPT system allows for a vehicle fitted with existing or new generation batteries to park over a small charging unit and commence charging immediately. Regular charging will allow for smaller batteries to be used in vehicles. In this paper, IPT system uses a full-bridge LLC resonant converter and is possible for the regenerative braking which is an energy recovery mechanism.

• Proceedings of the KSR Conference
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• 1999.11a
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• pp.558-565
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• 1999

Rubber wheel-type AGT has two major kinds of bogie; one is the bogie type and the other and passenger loads. This paper deals with the statics analysis for two types of bogie frame subjected to combined external forces, as well as independent ones specified in UIC 515-4. Furthermore, the dynamics 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 yielding 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 the case of a lateral loading. It is also observed that the steering type shows a be stiffened. It is strongly anticipated that vibrational fatigue analysis should be carried out under realistic loading conditions closely matching to situations such as running surface and lateral clearances along the guideway.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.430-435
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• 2008

Hyundai-Rotem Company has designed and manufactured Light Railway Vehicle (LRV) according to the Urban Rail Transit Code, which applies to urban railway vehicles in Korea. The Urban Rail Transit Code specifies the loads, for which vehicle bodies shall be capable of withstanding, identifies how material data shall be used and presents the principles to be used for design verification by analysis and test. The structural design of railway vehicle bodies depends on the loads they are subjected to and the characteristics of the materials they are manufactured from. Therefore Hyundai-Rotem Company has carried out Finite Element Analysis (FEA) and has performed load tests on the vehicle body according to the Urban Rail Transit Code. This research contains the results obtained by the analysis and the load tests. The analysis was carried out using I-DEAS Master Series 12 and load test were carried out using specially designed test jigs and equipment are used for the load tests.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1132-1137
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• 2008

Automatic Operation based on ATO (Automatic Train Operation) is necessary for driverless Light Rail Transit business. When this kind of driverless LRT operation plan is made, TPS (Train Performance Simulation) is traditionally simulated at all-out mode and coasting mode based on manual operation. Commercial schedule speed equals to all-out speed minus $9{\sim}15%$ make-up margin. Coasting mode TPS simulation is also run at commercial schedule speed to calculate run time and energy consumption. But TPS based on manual operation should make an improvement on accuracy in case of driverless LRT operation Plan. In this paper, new fast mode TPS simulation using ATO pattern is proposed and show near actual ATO result. The actual ATO pattern can be accurately simulated with the introduction of 4 parameters such as commercial braking rate, jerk, station stop profile and grade converted distance. Normal mode TPS simulation for commercial schedule speed can be designed to have fast mode trip time plus 3 seconds/km margin recommended by korean standard LRT specification.