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http://dx.doi.org/10.7782/JKSR.2012.15.5.485

Static and Dynamic Behavior at Low-Frequency Range of Floating Slab Track Discretely Supported by Rubber Mounts in Real-Scale Laboratory Test  

Hwang, Sung Ho (High-speed Railroad System Research Center, Korea Railroad Research Institute)
Jang, Seung Yup (High-speed Railroad System Research Center, Korea Railroad Research Institute)
Kim, Eun (High-speed Railroad System Research Center, Korea Railroad Research Institute)
Park, Jin Chul (Seohae Engineering)
Publication Information
Journal of the Korean Society for Railway / v.15, no.5, 2012 , pp. 485-497 More about this Journal
Abstract
Recently, with increasing social interests on noise and vibration induced by railway traffic, the application of floating slab track that can efficiently reduce the railway vibration is increasing. In this study, to more accurately understand the dynamic behavior of the floating slab track, a laboratory mock-up test has been performed, and the static and dynamic behaviors at frequency range near the system resonance frequency were explored. Based on the test results, the design of the floating slab track and the structural analysis model used in the design have been verified. The analytic and test results demonstrate that the dominant frequency of the floating slab track occurs at the frequencies between vertical rigid body mode natural frequency and bending mode natural frequency, and the dominant deformation mode is close to the bending mode. This suggests that in the design of the floating slab track, the bending rigidity of the slab and the boundary conditions at slab joints and slab ends should be taken into consideration. Also, the analytic results by the two-dimensional finite element analysis model using Kelvin-Voigt model, such as static and dynamic deflections and force transmissibility, are found in good agreement with the test results, and thus the model used in this study has shown the reliability suitable to be utilized in the design of the floating slab track.
Keywords
Railway vibration; Floating slab track; Anti-vibration rubber; Flexural rigidity; Slab joint; Slab ends;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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