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RISS 인기검색어
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- 저자 : 엄기영 ( Eum Kiyoung ) (검색결과 7 건)
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박종찬(Park, Jongchan),엄기영(Eum, Kiyoung),임남형(Lim, Namhyoung) 한국방재학회 2022 한국방재학회논문집 Vol.22 No.1
최근 국내에서 기존의 산악도로를 활용하는 산악철도 시스템이 개발되고 있다. 급곡선부가 많은 국내 산악도로의 선형을 고려하면 산악철도 최대 곡률반경은 약 10 m이다. 그러므로 산악철도 궤도구조에 적용되는 50 N 레일은 공장에서 곡률반경 10 m로 휨 가공되어야 한다. 본 연구에서는 실내실험을 통하여 50 N 레일의 재료적 특성을 분석하고, 휨 가공(R = 10 m)에 따른 거동특성을 분석하여 산악철도 급곡선부에서의 적용성을 평가하였다. Currently, a mountain railway system using existing mountain roads is being developed in Korea. Considering the alignment of domestic mountain roads with many sharp curves, the maximum radius of curvature of the mountain railway is about 10 m. Therefore, the 50 N rail applied to the track structure of the mountain railway must be manufactured with a radius of curvature of 10 m at the factory. In this study, the material properties of 50 N Rails were analyzed through indoor tests and the behavioral characteristics according to bending processing (R = 10 m) were analyzed to evaluate their applicability to sharp curves on mountain railways.
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정흥채(Chung Heungchai),엄기영(Eum Kiyoung),김석원(Kim Sukwon),서정원(Seo Jungwon),신종한(Shin Jonghan) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
A field of test and evaluation plays an important role in railway system in the safety and reliability aspects. In this paper, test and evaluation items for various railway systems i.e., conventional railway system, tilting system, and high speed railway system, were compared to analyze characteristics of the systems.
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400km/h 운행 최적 시범구간 선정을 위한 주행성능해석
정흥채(Heungchai Chung),엄기영(Kiyoung Eum),윤장호(Jang-ho Yun) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In Korea the HEMU-400X(High-speed Electric Multiple Unit-400km/h eXpress) has been developed since 2007 and will be operated over 400km/h in 2013. It is necessary to prepare test-bed section in Honam high-speed railroad to take the maxim running speed test for the HEMU-400X developed. In order to determine proper test-bed sections for the maximum speed of 400km/h TPS(Train Performance Simulation) program with the data of train model running resistance traction power and braking capacity was used to analyze the train performances such as locations speeds and power consumptions by times. In this study the specifications of the HEMU-400X project and the route conditions of the Honam high-speed railroad under construction were utilized for the TPS program to determine the optimal test-bed sections for the maximum speed of 400km/h.
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여인호(Yeo Inho),엄주환(Um Juwhan),엄기영(Eum Kiyoung) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The track impact factor of conventional line was estimated using the data for measured wheel load in field test and the properties of current operating trains. The equation for track impact factor was presented through the statistical analysis of variational ratio in wheel load and compared with other design equations in domestic and foreign countries. A review on the safety of track system III conventional line was made from the relationship between the velocity and the corresponding impact factor It was found that the impact factor from the proposed equation is a little less than the values from the equations adopted in both AREA and domestic railway, while it is same as the equation for continuous welded rail(CWR) in Japan. Therefore it could be said that the track satisfies a criteria for dynamic load caused by the train and the corresponding level of safety is guaranteed for dynamic load of the train
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여인호 ( Yeo¸ Inho ),엄주환 ( Um¸ Juwhan ),엄기영 ( Eum Kiyoung ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
The track impact factor of conventional line was estimated using the data for measured wheel load in field test and the properties of current operating trains. The equation for track impact factor was presented through the statistical analysis of variational ratio in wheel load and compared with other design equations in domestic and foreign countries. A review on the safety of track system in conventional line was made from the relationship between the velocity and the corresponding impact factor. It was found that the impact factor from the proposed equation is a little less than the values from the equations adopted in both AREA and domestic railway, while it is same as the equation for continuous welded rail(CWR) in Japan. Therefore it could be said that the track satisfies a criteria for dynamic load caused by the train and the corresponding level of safety is guaranteed for dynamic load of the train.
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실대형 실험을 이용한 가진주파수 변화에 따른 콘크리트궤도의 동적평가
최찬용(Chanyong Choi),김현기(Hunki Kim),엄기영(Kiyoung Eum),강윤석(Yunsuk Kang) 한국지반신소재학회 2014 한국지반신소재학회 논문집 Vol.13 No.3
호남고속철도에 부설된 동일한 궤도노반시스템을 실제 열차하중이 가능한 실대형 가진시험을 통해 성능을 평가하였다. 실험결과 Odemark 등가깊이 이론에 의한 노반압력과 매우 유사한 것을 확인하였다. 콘크리트궤도에서 정적하중 330 kN을 재하시 노반 상부의 토압은 50 kPa 이내로 발생하였고, 적하중시험과 반복하중시험 결과는 비교적 큰 차이가 없었다. HSB의 탄성변위는 증속시험 시 관리기준값 1 mm에 비해 약 1/100 수준이며, 노반의 탄성변위량과 비교해볼 때 1/175 정도로 매우 작은 변위가 발생하였다. 가진주파수의 크기에 따라 궤도노반의 동적거동은 가진주파수가 35 Hz이하에서는 모든 측정값이 거의 선형적으로 증가하였으나, 35 Hz이상에서는 윤중, 변위, 지반가속도 등이 감소하였다. In this study, the full scale model tests were performed with track-roadbed system such as Ho-nam high speed railway. The measured data gives good similar a roadbed pressure with equivalent depth to the Odemark’s theory. In the case of earth pressures have a under 50 kPa at upper-subgrade applying 330 kN static loading. Results of cyclic loading tests did not differ significantly from those of static loading test. The elastic displacement at HSB layer has a level of 1/100 compared to the 1 mm that it was evaluation criteria for speed up of High Speed Railway. Elastic displacement at subgrade layer was measured a level of 1/175. The dynamic characteristics of track-roadbed with loading frequency level were linearly increased under 35 Hz, while the wheel loading, displacement and acceleration of roadbed were decreased loading frequency above 35 Hz.
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최찬용(Chanyong Choi),김현기(Hunki Kim),양상범(Sangbeom Yang),엄기영(KiYoung Eum) 한국지반신소재학회 2015 한국지반신소재학회 논문집 Vol.14 No.4
원형모형실험을 통해 철도노반재료로 사용되는 흙을 대상으로 함수비 변화에 따른 침하관계를 평가하였다. 초기 함수비에서 침하량비(Re)는 2.08이었으나, 초기함수비보다 2배 이상으로 함수비가 증가되었을 때 침하량비(Re)는 4.06으로 4배 이상의 침하가 발생하였다. 또한 실제 공용중인 콘크리트궤도에서 계측된 강우데이타를 기반으로 약 1년여간 현장에 매설된 함수비 측정장비를 통해 장기 함수비 변화추이를 관찰하였다. 콘크리트궤도의 직하부에 위치한 함수비는 강우강도에 따라 변화가 거의 없는 수준이며, 사면부에서는 최대 강우강도 20mm/hr가 초과되는 경우 약 4% 정도의 함수비 변화가 생기는 것을 볼 수 있다. 이러한 변화정도를 볼 때 콘크리트 궤도의 경우 배수성능이 적절히 유지된다면 노반 내부의 함수비 변화는 강우에 대하여 영향이 매우 미비할 것으로 판단된다. In this study, it was performed in characteristics of settlement of roadbed materials with variation of water content using cylinder model device. The ratio of settlement (Re) of subgrade soils in the initial water content were about 2.08, whereas it was increased about 4.06 which resulted in increase two times in the initial water content. Also, it was monitoring long-term to measure variation of the field water contents at concrete track using rainfall measuring sensors. The water content at directly underneath of concrete track rarely seems to affect the variation of water content, but it was increased by about 4% than intial water content with 20 mm/hr rainfall index at slope section. As for the result from the field date, it was determined that the water content of the inner subgrade layer was rarely affect caused by more than 20 mm/h rainfall index during if good drainage system at concrete track properly maintained.
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