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http://dx.doi.org/10.5762/KAIS.2019.20.12.797

A Study on the Lateral Vibration Reduction of the High-speed Electric Multiple Unit  

Jeon, Chang-Sung (High-speed Railroad Systems Research Team, Korea Railroad Research Institute)
Park, Joon-Hyuk (High-speed Railroad Systems Research Team, Korea Railroad Research Institute)
Kim, Sang-Soo (High-speed Railroad Systems Research Team, Korea Railroad Research Institute)
Kim, Seog-Won (High-speed Railroad Systems Research Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.20, no.12, 2019 , pp. 797-803 More about this Journal
Abstract
This study was carried out to reduce the lateral vibration of high-speed electric multiple units. In the study, the high-speed electric multiple unit prototype (HEMU-430X) has a high lateral vibration at low equivalent conicity regardless of the wheel profiles (XP55, GV40, S1002). As wheel wear progresses and the equivalent conicity increases, the lateral vibration tends to decrease. The reason is that a combination of the suspension characteristics causes the body and bogie to resonate at a frequency of 1.4 Hz when the equivalent conicity is low, resulting in body hunting. An investigation of the lateral vibration of overseas high-speed trains showed that a decrease in the hydraulic stiffness of the yaw damper could improve the vibration. The series stiffness of the yaw damper is a combination of the hydraulic stiffness and elastic joint. In this study, an attempt was made to improve the lateral vibration by lowering the stiffness of the elastic joint. The series stiffness of the adjusted yaw damper was approximately 60% compared to the original one. The on track test results showed improvement in the lateral vibration for both running directions. The vibration reduction method of this study can be used for EMU-250 and EMU-320 in future commercial operations.
Keywords
High-Speed Electric Multiple Unit; Lateral Vibration; Wheel Profile; Yaw Damper; Series Stiffness;
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Times Cited By KSCI : 2  (Citation Analysis)
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