http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김남포(Nam-Po Kim),구동회(Dong-Whe Koo),한형석(Hyung-Suk Han) 한국철도학회 2003 철도저널 Vol.6 No.4
Using a conventional railway, a tilting train was applied as a means of improving vehicle speed during curve negotiation without any modification of infrastructure. As a study for the optimum design of the tilting mechanism of a tilting vehicle, the kinematics sensitivity of the tilting mechanism was analyzed. Using the geometric relationship of the linkage-type tilting mechanism, the relationship of the parameters and the performance index was defined using nonlinear algebraic equations. With the defined relation, the effect of change in the parameters on the performance was analyzed. The analysis result can be used in the optimum design of a tilting mechanism that considers the track environment, vehicle and operational condition in which the tilting vehicle is applied.
김남포,서승일,김정석,Kim, Nam-Po,Seo, Sung-Il,Kim, Jung-Seok 한국철도학회 2006 한국철도학회논문집 Vol.9 No.2
In this study, overturning safety for a tilting train has been evaluated. In the tilting train, the overturning safety is one of the most important factors because the carbody inclines inward a curve during curve negotiation. Dynamic analysis considering unbalanced lateral acceleration and carbody tilting has been carried out and the overturning safety for the tilting train has been evaluated according to height of CG of carbody. From these studies, the overturning safety for the tilting train under unbalanced lateral acceleration of $2m/s^2$ was superior to the conventional one at the same running speed.
180㎞/h급 한국형 틸팅차량의 대차후레임 구조해석 및 평가 연구
김남포(Nam Po Kim),문형석(Hyung Suk Mun) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Korea Railroad Research Institute(KRRI) have been developing Korean Tilting Train eXpress(TTX) with the service speed of 180㎞/h as the R&D project supporting by Korea government. The core of research is the development of the tilting bogie using the domestic tilting technologies. We developed the 3D-CAD prototype of tiling bogie model. In this paper we attempted to evaluate the structural strength of bogie frame using the Finite Element Method. Finally, we would like to propose the application of the modifying part to the detail design.
한국형 틸팅차량 설계의 비틀린 궤도상의 탈선안전도 검토
김남포(Kim Nam-Po),김정석(Kim Jung-Seok),박태원(Park Tae-Won) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The 180 ㎞/h Korean Tilting Train(TTX) which is now developing as a part of the Korean National R&D project, was elaborately designed. As the tilting trains run curve track with the 30% higher speed than normal trains, the higher centrifugal and dynamic force are expected. Furthermore the complex tilting system increase the probability of failure. Therefore it is very important for tilting train to ensure safety against derailment under the various kind of failed condition in the middle of running as well as normal operating condition. The TTX train have the relatively high roll stiffness to improve the lateral ride comfort and to limit the roll displacement on the curve. But the higher roll stiffness increase the risk of derailment on the twisted track. This paper describes the study to review the safety against derailment caused by the wheel unloading on the severely twisted track. The worst combination of maximum cant change with maximum twist defect was established by numerical simulation. And also it was assumed that the air bag deflated and still the train run its speed limit. Those kind of assumption might be the worst case from the view point of wheel unloading derailment on the twisted track. The dynamic simulation was done by means of VAMPIRE S/W and non-linear transient analysis. We found that derailment quotients Q/P was only slightly influenced by track twist but the wheel unloading was greatly influenced. And we ascertained that the higher roll stiffness the higher wheel unloading. In case of air bag deflated situation, the wheel unloading reached up to 100% which means the wheel lift or jumped. Therefore it was concluded that the design need to be improved to ensure the safety against derailment on the maximum twisted track in case of air bag deflated and tilting train"s speed limit.
김남포(Kim Nam-Po),김석원(Kim Seog-Won) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
The sophisticated technologies, ensuring both stability and curving performance, are required for the medium high speed train running on conventional railway line where tangent and curved section mixed together. We can hardly meet the both requirements conflicting each other with the conventional type of bogie. Effective solution is to apply stabilizing mechanism for the bogie design, which increase hunting stability or dynamically critical speed while maintaining curving performance. In this research the numerical analysis by means of multi-body dynamic simulation S/W, experiments by using roller test rig and main line running test have been comprehensively performed for the 200km/h Korean Tilting Train with newly developed stabilizer. The paper proposes the effectiveness of stabilizer and its usefulness based on the results of analyses.
김남포(Nam-Po Kim),김정석(Jung-Seok Kim),서승일(Sung-Il Seo),이수길(Su-Gil Lee),박태원(Tae-Won Park) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The bogie is the one of the most important components in a railway vehicle, as it is to support the car body and to guide the vehicle to the rails, to provide running stability, safety against derailment, better ride comfort, better curving performance. The tilting bogie is the bogie which include the tilting mechanism and tilting actuator within it and the tilting bogie should provide the better curving performance, better stability and ride comfort than conventional bogie as the tilting train run curve track almost 30% faster than conventional train. This paper described the dynamic characteristics of the tilting bogie which was developed as a part of the Korean National R&D project, 200㎞/h tilting train development for the speed-up of conventional railway lines.