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남기전(Nam Ki-jun),우성원(Woo Sung-won),박종원(Park Jong-won),박성익(Park Seong-Ik) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
To overcome bad conditions of surroundings, construction cost is increased and environmental issues are sometimes rising. Because railway alignment have to be designed to improve efficiency of train performance. The efficiency of train performance is affected by train ability, railway condition, system condition etc. Among these factors, deceleration and acceleration are main factors that determine the capability of train performance. Designed railway alignment is currently verified by TPS(running time, average velocity, Input energy), however, there is no obvious criterion for applicability of deceleration and acceleration. Moreover, results due to changes of deceleration and acceleration tend to be derived irregularly in process of programming. Therefore in this study, problem of applied program is considered by investigating the results for modelled alignment. And efficiency for train performance is also examined by increasing the velocity limit of downward slope which is prescribed by Train Operation Manual.
정영훈(Jung, Younghun),남우성(Nam, Woo Sung),신홍준(Shin, Hongjoon),허준행(Heo, Jun-Haeng) 대한토목학회 2012 대한토목학회논문집 B Vol.32 No.6B
본 연구에서는 댐의 상시보장유량 설정에 기준이 되는 갈수량을 산정하기 위하여 화천댐과 춘천댐의 유입량 자료를 구축한 후 적합도 검정을 실시하여 적정확률분포형을 선정하였다. 또한 선정된 적정확률분포형에 대하여 재현기간에 따른 월별 유입량 계열로 산정한 갈수빈도해석 방법(case 1)과 월단위 누가유입량 계열의 차로 산정한 갈수빈도해석 방법(case 2)을 수행하였다. 본 연구를 통해 한강유역의 상류댐인 화천댐과 춘천댐의 통계적 특성을 반영한 월별 재현기간에 따른 유입량은 홍수기에 제한수위를 설정하는 것과 같은 형식으로 댐의 상시보장유량을 보장하는 저수위를 설정하거나 이수용량을 결정하는데 활용될 수 있을 것으로 판단된다. In this study, the low-flow frequency analysis was performed to determine the low-flow standard of dam maintenance flow for Hwacheon and Chuncheon dams. For this purpose, two methods (case 1: low-flow frequency analysis using the monthly inflow data of the specified return periods, case 2: low-flow frequency analysis using the difference of monthly accumulated inflow) were applied. As a result, it is found that the monthly inflow data of the return periods by reflecting the statistical characteristics of Hwacheon and Chuncheon dams can be utilized to determine the standard of maintenance flow or water level.