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http://dx.doi.org/10.5762/KAIS.2017.18.1.579

Optimum Design of Cross Section Lateral Damper Oil Seals for High Speed Railway Vehicle  

Hwang, Ji-Hwan (Graduate School of Transportation, KNUT)
Kim, Chul-Su (Department of Railway Vehicle System Engineering, KNUT)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.1, 2017 , pp. 579-584 More about this Journal
Abstract
The damper oil seal of a high-speed railway vehicle is made from nitrile butadiene rubber (NBR) in order to prevent lubricant from leaking into the damper and to stop harmful contaminants from entering the external environment while in service. Oil leakage through the seal primarily occurs from fatigue failure of the damper. Cumulative damage of the seal occurs due to the contact force between the rod and the rubber during movement due to track irregularities and cants, among other factors. Thus, the design of the oil seal should minimize the maximum principal strain at weak points. In this study, the optimal cross section of the damper oil seal was found using the multi-island genetic algorithm method to improve the durability of the damper. The optimal shape of the oil seal was derived using process automation and design optimization software. Nonlinear material properties for finite element analysis (FEA) of the rubber were determined by Marlow's model. The nonlinear FEA confirmed that the maximum principal strain at the oil leakage point was decreased 24% between the initial design and the optimum design.
Keywords
Damage; High Speed Railway Vehicle; Lateral damper; Multi Island Genetic Algorithm; Oil Seal;
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Times Cited By KSCI : 4  (Citation Analysis)
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