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http://dx.doi.org/10.7782/JKSR.2012.15.6.543

A Study on Tail Vibration Reduction for the Next Generation High Speed EMU  

Jeon, Chang-Sung (Korea Railroad Research Institute)
Kim, Young-Guk (Korea Railroad Research Institute)
Kim, Seok-Won (Korea Railroad Research Institute)
Kim, Sang-Soo (Korea Railroad Research Institute)
Choi, Sung-Hoon (Korea Railroad Research Institute)
Park, Tae-Won (Department of Mechanical Engineering, Ajou University)
Publication Information
Journal of the Korean Society for Railway / v.15, no.6, 2012 , pp. 543-549 More about this Journal
Abstract
This study describes the tail vibration reduction for the next generation high speed EMU(HEMU-430X). The model of 6 cars was generated and the calculation was performed using VAMPIRE(railway vehicle dynamic software). In view of ride characteristics, HEMU-430X was expected to sway at the tail because of the yaw damper direction. The lateral acceleration of vehicle body exceeded the criteria because of hunting. To reduce this hunting motion, some methods such as wheel profile change, the change of damping coefficient for the 2nd lateral damper, the damping coefficient change of yaw damper were tested, but had little effect. Finally, the yaw damper direction was changed and the tail vibration disappeared. In real running test, the tail vibration appeared at the speed of 150km/h and the yaw damper direction change made the vehicle stable at the speed of 300km/h. The maximum test speed of HEMU-430X is 430km/h. If the tail vibration appears at higher speed, some other methods in this study may be considered to reduce it.
Keywords
High speed EMU; Tail vibration; Wheel profile; Lateral damping coefficient; Yaw damper;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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