곡선부의 선형 및 차량특성에 따른 궤도작용력과 주행안정성 특성에 관한 해석적 연구

Recently, the improvements of infrastructure of Kyung-Chun line and other operation line are going on, in the field of vehicle, the KTX-Ⅱ which surpasses 300㎞/h was developed, and then next-generation high-speed train which surpasses approximately 400㎞/h has been planning. Thus, new train which will be serviced in high-speed reduces the axle load to 13t. It is expected to change average velocity of 200㎞/h, so it should need to review the changes between running stability and rail forces based on parametric track interaction. Therefore, in this study, the mathematical model was improved for the analysis of the rail forces and the running safety. Also, in the curved track, the rail forces and the running safety was evaluated considering the conditions such as wheel load, lateral force, derailment on the curved track, radius, velocity, track layout, the stand deviation of track irregularity, transition curved length, and change of axle load. In the result of this study, wheel loads of outer rail were increased according to the reduction of track radius and the increase of vehicle speed. In addition, as to the variance of radius, the load distribution rate of wheel load of outer and inner rail changed. The derailment coefficient was changed according to the track layout and the vehicle velocity, but it was performed within derailment limit and according to the range of axle load, the derailment coefficient was not influenced in the case of large radius. In case of outer rail, the wheel load was reduced according to the axle load of train in the range between 170kN and 100kN.