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국철구간 300m 장대레일 적재 화차의 적정주행속도 결정에 관한 연구
양신추(S. C. Yang),김은(E. Kim),정우진(W. J. Chung) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, a numerical method which assesses running stability of freight car loading 300m CWR and structural safety of conventional railway track when passing over curves and steel girder bridges is presented. Optimal speed of the freight car is suggest on the basis of numerical reviews for stability of derailment of the freight car and structural safety of track at weak points of the conventional line.
양신추(S. C. Yang),강윤석(Y. S. Kang),김은(E. Kim) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper deal with optimal design of reinforced track as a track reinforcing method for transition area of track support stiffness in transition area between bridge and earthwork. When vehicle passes through transition area, dynamic properties between vehicle and track are studied by the analysis of vehicle-train interaction for the each case when reinforced tracks are used or not. Furthermore, optimum decision of type and length of track are made based on the performance adapting variable parameters : support stiffness of track for bridge and earthwork, heading direction of vehicle and type and length of track.
정우진(W. J. Chung),양신추(S. C. Yang),강윤석(Y. S. Kang) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
The KNR(Korean National Railroad) is trying to set a new rail standard to back up the speed-up policy of the conventional railways. This work has passably significance since the rail standards used were introduced from Japan without the consideration on our situation. The contact analysis between wheel treads and rail heads, attended with complex calculation and the wear experiments taken long time should be accomplished for the exact investigation to establish a new rail standard. However, this paper just concentrates the structural investigation of the proposed rail standard and the dynamic analysis between trains and rail models with intent to shift the above procedure on the next step.
김종오(Jong Oh Kim),양신추(S. C. Yang),오일근(Il Geun Oh),이희성(Hi Sung LEE) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, it is offering a numerical method which assesses running safety of the freight car loaded CWR when passing through on the conventional railway by additional lateral load. It is suggested based on the numerical reviews of the safety against derailment after seeking the derailment coefficient estimated by wheel load-lateral force equation in the section that curve radius is small.
정우진(W. J. Chung),양신추(S. C. Yang) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
Now, Korea National Railroad is planning many ways to increase the maximum operating speed of train up to 200㎞/h by 2010. Among those ways, connecting conventional line with the KTX is the strongest alternative. Mostly, conventional lines are consisting of both KS50N and KS60 rail. However, the excessive abrasion might be occurred between wheel and rail when the KTX designed to operate on UIC60 is operating on the conventional line. On this study, new standard of 60㎏-class rail considered suitability for both KTX and wheel used in conventional line is presented. It seems to be an effective solution for increasing maintenance costs expected when commercial speed of conventional line is increasing.
장대레일 화차의 분기부 및 곡선구간 통과시 추가횡압 발생에 관한 연구
김은(E. Kim),양신추(S. C. Yang),이지하(J. H. Lee),이종득(J. D. Lee) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
This research suggests the assessment method of the additional lateral force caused bending moment of CWR when a freight car loading it is passing over turnout system or curves. The characteristics of lateral force are analyzed by calculating the lateral pressure acting on the rails of conventional railway.
정우진(W. J. Chung),신정렬(J. R. Shin),양신추(S. C. Yang),김남포(N. P. Kim) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
This study has been performed to develop the practical method to estimate the change of dynamic characteristics of rolling stocks passing on the high speed turnout system. Each part of turnout system are modeled in consideration of alignment, enter angle and amount of deflection and they are used to achieve dynamic analysis with a train model. Analysis results are compared with test results to confirm its validation.