• Proceedings of the KSR Conference
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• 2011.10a
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• pp.1616-1623
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• 2011

The concrete track was applied for Gyungbu 2nd phase high_speed railroad line as a basic track structure. Two track structures, ballasted track and non_ballasted concrete track, have a different train load transfer mechanisms. However, it's rare to see about research results related with it. So, to understand dynamic response characteristics of the concrete track and roadbed, we measured accelerations of carbody and bogie, vertical and lateral load, stress and displacement of rail, and earth pressures of subgrade at ${\bigcirc}{\bigcirc}{\bigcirc}$k930 station of Gyungbu high_speed line during speed up tests before opening it. Based on these measured results, we could evaluate the level of dynamic responses of the track quantitatively.

• Journal of Electrical Engineering and Technology
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• v.11 no.1
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• pp.257-264
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• 2016

In this paper, new electric railway feeding system which has active transformer is modeled for evaluating the steady state analysis using PSCAD/EMTDC. Equivalent models including power supply, feeder, train and transformers are proposed for simplifying the model of the feeding system in high speed electric railway. In case study, simulation results applied to proposed model are compared with the conventional and new systems through the catenary voltage, three-phase voltage of PCC (Point of Common Coupling) and the efficiency of regenerative braking energy.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.1342-1347
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• 2011

Advantages of the deeply underground subway are underground space efficiency, high speed, decrease of noise and vibration. However, when fire occurs in the deeply underground subway station, large casualties are occurred like Daegu subway station fire due to the increase of evacuation distance. In this study, a numerical analysis was performed by using the fire and evacuation analysis program FDS+EVAC for smoke movement and evacuation in Beotigogae station among the deeply underground subway station. Heat release rate of carriage fire was set 10MW and the fire growth rate was ultrafast. As a result, the smoke move to the exit at 1085 second. The total evacuation time took 956 second.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.645-656
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• 2008

The operation of express train on the Seoul Metropolitan Subway Network is centered on the Kyungbu and Kyungin lines and the short section between Dongducheon station and Ganyung station which is 20.7km long. It is true that the needs of many customers who want to reduce their commuting hours by express train is not satisfied. This paper proposes that the operation of express trains be enlarged to Sungbuk station on Kyungwon line which comes to 34.9 km long, and to Yangsu station from Youngsan station on Jungang line. The type of operation is mixed one with high and low speed trains, which operates express train by use of existing siding tracks without improving facilities such as extra building of sidings. This pragmatic study is to apply the goal of reducing running time as express train and to suggest the selection of appropriate stops, effectivenes analysis of express train operation and formation of train diagrams to actual operation.

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.359-370
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• 2010

In Apr. 2004, the 1st phase of Gyeongbu high speed railroad line was opened between Seoul and Busan, and this new high speed railroad service has increased the customers' satisfaction index and railroad passengers' profit. Moreover, at the end of year 2010 the 2nd phase of Gyeongbu high speed railroad line will be open, and the journey time between Seoul and Busan will be shortened and the new high speed railroad service will be expanded to Gyeongju & Ulsan area. This study will introduce the operation of connection service between new stations and downtown to the 2nd phase Gyeongbu high speed railroad station (Gyeongju, Ulsan station), and analyze the effects of connection service using connection demand analysis and also economic effects. This kind of connection service will contribute to the increase of passengers' satisfaction index and high speed railroad revenue.

• The Journal of the Acoustical Society of Korea
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• v.34 no.5
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• pp.385-393
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• 2015

The speed of train has rapidly been increased in accordance with the developed railway technology. Nowadays, high-speed trains were introduced which has the speed faster than 400 km/h. In Korea, a lots of efforts were undertaken to increase the speed of train faster than 350 km/h, however noise and vibration are still the main problems to solve for realization of the high-speed train. In the case of operation speed faster than 350 km/h, it can be easily presumed that the noise and vibration damages could be increased in the train stations which are close to the passing railway tracks. Thus, the noise in the five different types of high-speed train stations were analyzed including stations built on the ground, underground, under rail, and two types on rail. The present paper predicts noises inside the stations depending on the speed of the passing trains and analyze the noise comparing with noise criteria (NC). Sound insulation performance of each part of buildings was calculated using the transmission noise formula and computer modeling, Finally, a series of processes were introduced to satisfy the aural environment with the optimum interior noise criteria by changing interior finishing materials.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1954-1961
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• 2007

This project of total city plan is developed for the area of DONGDAEGU station in the field of new city-core which is adapted for a forefront city and rational restructuring of the city space and improving for balanced growth according to the first phase operation of Korean high speed line and its complete construction to BUSAN. Bring a new heart of this city of the area of DONGDAEGU station which is a gateway to DAEGU city so that the area contrives a new creation of the city space, balanced developing and activation of a region economy. Deliberate for plan of private capital for harmonious to develop a territory of station therefore it raises an emblem of DAEGU city and activates an economy of the city according to the new trend of the condition of transportation integrated administration of a large regionand new development of DONGDAEGU station.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1254-1266
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• 2007

This project of total city plan is developed for the area of DONGDAEGU station in the field of new city-core which is adapted for a forefront city and rational restructuring of the city space and improving for balanced growth according to the first phase operation of Korean high speed line and its complete construction to BUSAN. Bring a new heart of this city of the area of DONGDAEGU station which is a gateway to DAEGU city so that the area contrives a new creation of the city space, balanced developing and activation of a region economy. Deliberate for plan of private capital for harmonious to develop a territory of station therefore it raises an emblem of DAEGU city and activates an economy of the city according to the new trend of the condition of transportation integrated administration of a large regionand new development of DONGDAEGU station.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.755-764
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• 2008

When the high speed train (KTX) departs from station in the high-speed line, sometimes on board signal disappears, which causes a hindrance of the operation punctuality, therefore, we have a research objective to verify the causes of hindrance and to find an improvement plan. In the process of research, when train left, we applied sand on the rail to improve adhesive power, whose sand has an effect on the ATC(Automatic Train Control) signal wave. We detected & analyzed signal waves which came from detecting device by changing operation condition in accordance with sand material

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.810-813
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• 2003

The present headway on KNR(Korea National Railway) lines varies from 6 to 10 minutes depending on the each line and by the operation of High Speed line in 2004, the bottleneck would be expected within a few sections such as Daejeon-Daejeon shunting yard which will be the common mute between KTX(Korea Train Express) and conventional trains. Therefore, KNR would like to reduce the headway of the all lines by 4 minutes with the implementation of ERTMS/ETCS on-board system. Where ETCS(European Train Control system), the subsystem of ERTMS, is Automatic Train Protection system for safety train running. This study will be analyze expected braking distance and running time depending on characteristics of conventional passenger and freight trains and high speed train will be operated within electrified conventional line for comparing the headways of ATS(Automatic Train Stop) system and ETRMS/ETCS system within the Daejeon-Daejeon shunting yard section.