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A Study on the Eigenmode Characteristics by Changing Damping Parameters of Secondary Suspension (Damper) on Railway Vehicles  

Shin, Yu-Jeong (Dept. of Future Traffic System University of Science & Technology)
You, Won-Hee (Vehicle Dynamics Research Dept. Korea Railroad Research Institute)
Park, Joon-Hyuk (Vehicle Dynamics Research Dept. Korea Railroad Research Institute)
Hur, Hyun-Moo (Vehicle Dynamics Research Dept. Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Precision Engineering / v.28, no.7, 2011 , pp. 796-804 More about this Journal
Abstract
Railway vehicles are capable of indicating several types of instability. This phenomenon, which is called hunting motion, is a self excited lateral oscillation that is caused by the running velocity of the vehicle and wheel frail interactive forces. The interactive forces act to change effectively the damping characteristics of railway vehicle systems. This paper will show the impact of instability on the transfer function behavior using damping characteristics of secondary suspension. The vehicle dynamics are modeled using a 17 degree of freedom considering linear wheel/rail contact. The paper deals with certain condition of the damper characteristics that one is about various damping coefficient and another is equipped damper direction.
Keywords
Ride Comfort; Natural Frequency; Hunting Frequency; Railway Vehicle; Secondary Suspension;
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