• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 추계학술대회 논문집
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• pp.99-106
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• 1999

Because many light rail transit systems are mainly operated in the downtown areas of a large cities and the congestion areas, there are many steep gradients and sharp radius sections in that lines. As that reasons above, light rail vehicles are equipped with differential gear units between traction motors and final reduction gear units. In this paper, the configurations and the interferences of 2K-H I type Planetary gear train, which is applicable for light rail vehicles and based on various differential gear units, are studied. The ranges of addendum modification coefficients which would not lead to interferences is analyzed, and optimal addendum modification coefficients among these ranges are presented, which generate the maximum efficiency of planetary gear drives and differential gear unit as pressure angles, speed ratios,

• 한국철도학회논문집
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• 제17권2호
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• pp.133-139
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• 2014

국내에 건설 운영 중인 경전철 고가구조물은 설계 당시 경전철 고가구조물 설계기준이 마련되어 있지 않아 일반 철도교 설계기준 및 국외 차량제작사에서 제시한 설계기준을 참조하여 설계된 관계로, 고가구조물이 과다 설계되어 비경제적으로 건설된 주된 이유가 되고 있다. 본 연구에서는 고무차륜형 경량전철이 고가구조물 위를 각각 50km/h, 60km/h, 70km/h의 속도로 주행 중 5개 제동 지점별로 제동 시 고가 하부구조물에 작용하는 제동하중을 현장 계측시험을 통해 분석하였고, 현재 설계시 반영되고 있는 철도설계기준과 비교하였다. 본 연구에서 제시된 제동하중 시험분석 결과는 향후 경전철 고가구조물 설계기준 제정 시 참조될 수 있다.

• 한국철도학회논문집
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• 제3권1호
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• pp.19-26
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• 2000

The rail temperature is important to preserve the joint gap for standard length of rail and to determine the installation temperature which has direct influence on the rail buckling and failure in welded part for continuous welded rail(CWR), Therefore, we have measured and investigated various characteristics of rail temperature for each kind of rail. As the results of this, the correlation between the atmosphere temperature and the rail temperature which is commonly used by Korean Railway should be reconsidered. Also, the daily highest '||'&'||' lowest rail temperature was occurred when each temperature is higher and when it's lower. For the light rail, the rail temperature by the sun-light increases quickly and decreases late. But the time where the highest temperature is attained is same. There are some differences between the shade and sunny place about 3.0∼4.0$\^{C}$. The temperature of rail web is almost close to the conversion rail temperature for rail expansion. The wind of 1 m/s has an influence on the rail temperature around 5$\^{C}$.

• 대한토목학회논문집
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• 제33권1호
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• pp.261-272
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• 2013

경량전철(LRT: Light Rail Transit)은 중량전철에 비해 많은 장점을 가진 효과적인 대중교통수단이다. 따라서 많은 지자체에서 도입을 추진하고 있고, 부산광역시에서는 이미 반송선과 부산김해경전철 등 2개 노선을 국내 최초로 무인운행방식으로 도입하여 운행중에 있다. 본 연구는 이렇게 도입된 경전철과 관련한 이용자 측면의 서비스 만족도를 분석하고, 부족한 부분을 보완하여 경전철의 서비스를 개선해 나가는 데 우선순위를 제시하였다. 본 연구에서는 실제 무인자동운전 경량전철(부산김해경전철과 반송선)의 이용자를 대상으로 설문조사를 실시하여 경량전철에 대한 안전성 의식과 서비스에 대한 이용만족도를 파악하고, 구조방정식 기법을 활용하여 두 개의 서비스 이용만족도 모형(반송선모형과 부산김해경전철모형)을 구축하여 비교 분석하였다. 분석 결과 이용자 중심의 경전철 서비스 개선대책과 우선순위를 도출하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.517-544
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• 2011

Promote competition in local government and the construction of a subway construction in the vicious cycle of debt due to the operating deficit as a greater burden on local finances was leave. This government policy of public transport in the center of the metro construction costs affordable and to respond appropriately to public transport demand new transit LRT(Light rail Transit) by introducing the current Busan was the opening of Line 4, yongin line, Busan - Gimhae line, parliamentary and barge construction or ready for the opening. What is light rail, compared to the existing subway and cheaper construction cost, the existing road or bridge that runs along the track is installed, etc. Manless system construction cost and operating expenses as a possible new railway transportation has been a leading state-of-the-art mad. However, the domestic business system engineering of light rail-related companies in the developed countries are doing to advance to the national to the local engineering skills of the self-free, hurry will have to be secured. Therefore, this paper applies local light rail project on the status of the systems engineering analysis and based on this source of the latest engineering technology-intensive systems engineering to provide direction to the development of technology.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.30-40
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• 2007

The demand for light-rail construction projects has recently been increasing, and they are mostly supervised by private construction companies. Therefore, a private construction company that aim to raise gains from the operation of the facilities during the contract period greater than what they invested should b able to accurately calculate the costs from the aspect of Life Cycle Cost (LCC). In particular, a light-rail transit bridge that has a heavier portion from the aspect of the cost of light-rail transit construction requires a more accurate calculation method than the conventional LCC calculation method. For this, an LCC analysis model was developed and a cost breakdown structure was suggested based on literature review. The construction costs by shape of the upper part of a light-rail transit were calculated based on the cost breakdown system presented in this paper, and the cost generation cycle and cost unit price were collected and analyzed based on records on maintenance costs, rehabilitation and replacement. In addition, after forming some hypotheses in order to perform the LCC analysis, economic evaluation was conducted from the aspect of the LCC by using performance data by item.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.135-140
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• 2003

Recently Light Rail Transit(LRT) systems, especially full automatic systems are strongly issued by many provinces and major cities due to it's own characteristic for economical, environmental and sufficient transportation capacity. But LRT design criteria should be modified according to Rolling Stock's properties. -size, arrangement of bogie and wheel, power of traction motor etc, This thesis suggest for basic standard design criteria of Rubber Tired Light Rail Transit system.

• 연구논문집
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• 통권27호
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• pp.35-45
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• 1997

The dynamic design process for the articulated bogie of light rail vehicle(LRV) was studied to design a primary and secondary suspension elements. Suspension stiffness and damping is selected on the basis of the ride quality and suspension stroke trade-off. LRV was modeled as a 2 d.o.f linear system for the design of vertical suspension characteristics and a 4 d.o.f linear system for the design of lateral suspension characteristics. FRA's class-4-track irregularity was used for the exciting disturbance on track. The optimum value of primary and secondary suspension characteristics was determined using this design process.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1585-1588
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• 2003

Based on the design requirements for the rubber-tired AGT light rail vehicle. the braking system was designed. Its major components are a brake operating unit, a pneumatic-hydraulic transfer, screw compressor, oil separator. air dryer, hydraulic caliper. After the components of braking system were manufactured. some factory tests were executed to evaluate their performances. The Results of these tests can guarantee a performance. safety of the braking system developed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 추계학술대회 논문집
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• pp.437-446
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• 1999

The structural behavior of the composite material light rail vehicle body are investigated. Composite material is very useful for light rail vehicle structure due to its high specific strength and lightweight characteristics. The main carbody is made of aluminum alloy. The side wall and roof with composite panels can reduce total vehicle weight about 2000kg. In addition, with the lower density of the foam, enhances lightness in the panel and to save the operation expenses. The finite element analysis code, ANSYS is used to evaluate the stability of the body structure under the various load conditions.