Abstract
This research was performed to examine the fundamental running stability of KTX (Korea Train Express) theoretically. Train set system consisting of 20 cars was the subject for analysis. Because train set consisting of 20 cars has so much DOF that commercial programs can't do modeling, 'in-house' program being able to assess the running stability of lateral of train set was developed and used for this research. Analysis was concentrated on the lateral motion of the train set. Analytical results were reported as the results of some important material property and conicity. In the end the characteristics of train set based on the analytical results were reported.
