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http://dx.doi.org/10.7736/KSPE.2014.31.9.765

Study on Reduction Method and Characteristic of Lateral Vibration of the Tail Car in a High Speed Train  

Kim, Jae Chul (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute)
Kwon, Seok Jin (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Precision Engineering / v.31, no.9, 2014 , pp. 765-771 More about this Journal
Abstract
During the acceptance test of KTX, unexpectedly great lateral vibration in 14th~16th train at 150km/h~200km/h was appeared on a straight line in the winter season. Generally, stiffness of secondary suspension in KTX vehicle is one of the most sensitive components on air temperature. So, we examined that the secondary suspension to be mounted heating system was able to reduce the lateral vibration in the tail car of KTX. Also, we verified that lateral vibration from test results on KTX train with wheel conicity 1/20 disappeared. In this paper, we analysis effective reduction methods and the cause of the lateral vibration using model of KTX train and compare with the test results. The analysis results agree well with test ones. From mode analysis result, lateral vibration is occurred at natural frequency range 0.5~0.6Hz with a negative damping value and its natural frequency disappear gradually according to increasing of wheel concinicy.
Keywords
High-Speed Train; Lateral Vibration; Korea Train Express (KTX); Wheel Conicity;
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  • Reference
1 Kim, J. C., Kang, B. B., Koo, D. H., Lee, C. W., Seo, J. W., et al., "A Study on Running Performance for KTX," Korea Rail Network Authority, 2003.
2 Fujimoto, H. and Miyamoto, M., "Measures to Reduce the Lateral Vibration of the Tail Car in a High Speed Train," Proc. of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Vol. 210, No. 2, pp. 87-93, 1996.   DOI