Many floating tracks have been used for only low-speed trains as vibration reduction system. A study was carried out on dynamic response and running quality, using various floating tracks for high-speed train. A simulation program, DIASTARS was used in this analysis. In this program, the Shinkansen vehicle is three-dimensionally modeled as having a body, two trucks, and four wheelsets connected to each other by spring and dampers. The floating tracks were modeled by three dimensional finite element methods. In this study, the wheel load variations and vehicle body accelerations were investigated by dynamic interaction analysis between vehicle and track. The parameter was the train speed and the stiffness to support track.
