- Volume 15 Issue 5
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Static and Dynamic Behavior at Low-Frequency Range of Floating Slab Track Discretely Supported by Rubber Mounts in Real-Scale Laboratory Test
고무 마운트로 이산 지지되는 플로팅 슬래브 궤도의 실모형 실내 실험에서의 정적 및 저주파 대역 동적 거동
- 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)
- Received : 2012.07.23
- Accepted : 2012.08.27
- Published : 2012.10.30
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.
Supported by : 국토해양부
- C. Esveld (2001) Modern Railway Track, 2nd edition, MRTProductions.
- H.G. Wagner (2002) Attenuation of transmission of vibrations and ground-borne noise by means of steel spring supported low-tuned floating trackbed, 2002 World Metro Symposium, Taipei.
- H.G. Wagner (2008) Using high-performance mass-spring systems to reduce noise and vibration in track, Interface - The journal of Wheel/Rail Interaction, July, available at http://interfacejournal.com/features/07-08/mass_spring/1.html.
- K. Kimura, T. Nakajima, A. Minegaki, Y. Yamamoto, H. Shiokawa, K. Suzuki (2000) Design and construction of the floating track bed using coil springs, Proceedings of 7th Railway Technology Joint Seminar of The Japan Society of Mechanical Engineers(in Japanese).
- A. Green (2006) Slab track hits the right note in Basle, International Railway Journal, September.
- C.K. Hui, C.F. Ng (2009) The effects of floating slab bending resonances on the vibration isolation of rail viaduct, Applied Acoustics, 70(6), pp. 830-844. https://doi.org/10.1016/j.apacoust.2008.09.018
- J.W. Moon (2009) Development of Low Vibration Track (Floating Slab Track) and Technology for Improvement of Performance of Long-Span Bridges, 1st Interim Report for Next- Generation High-Speed Railway Technology Development( Land, Transport and Maritime R&D Research Project), No. R&D/II-2-2(in Korean).
- S.I. Cho (2009) Development of Low Vibration Track (Floating Slab Track) and Technology for Improvement of Performance of Long-Span Bridges, 2nd Interim Report for Next- Generation High-Speed Railway Technology Development( Land, Transport and Maritime R&D Research Project), No. R&D/II-2-2(in Korean).
- A.K. Chopra (1995) Dynamics of Structures - Theory and Applications to Earthquake Engineering, University of California at Berkeley, Prentice Hall.
- S.Y. Jang, S.C. Yang (2012) Assessment of train running safety, ride comfort and track serviceability at transition between floating slab track and conventional concrete track, Journal of the Korean Society for Railway, 15(1), pp. 48-61(in Korean). https://doi.org/10.7782/JKSR.2012.15.1.048
- C.K. Hui, C.F. Ng (2008) Coupling resonance of floating slab and supporting concrete box structure, Applied Acoustics, 69(11), pp. 1044-1062. https://doi.org/10.1016/j.apacoust.2007.07.003
- M. Sjöberg (2002) On dynamic properties of rubber isolators, Doctoral thesis, Dept. of Vehicle Engineering, Royal Institute of Technology(KTH), Stockholm.
- M. Berg (1997) A model for rubber spring in the dynamic analysis of rail vehicles, Proceedings of Institution of Mechanical Engineers (IMech), Part F: Journal of Rail and Rapid Transit, Vol.211, pp. 95-108. https://doi.org/10.1243/0954409971530941
- DIN 45673-1 (2000) Mechanical vibration - Resilient elements used in railway track - Part 1: Laboratory determination of static and dynamic characteristics(in German).
- R.D. Blevins (1979) Formulas for Natural Frequency and Mode Shape, Robert E. Kieger Publishing Company, New York.
- T.T.C. Hsu, Y.L. Mo (2010) Unified Theory of Concrete Structures, John Wiley & Sons, Ltd., 1st ed.
- S.Y. Jang, S.C. Yang, S.H. Hwang, M.K. Ahn, W.I. Choi (2011) Dynamic behavior of train and track at slab joints of floating slab track, Proceedings of 2011 Fall Convention, the Korea Society for Railway(in Korean).
- S.B. Seo (2002) Permanent Way Engineering, Eul & Al, Seoul(in Korean).
- Performance Test of Rail Fastening System for Kyeong-Bu High-Speed Railway(Pandrol SFC System), 2005, Test Report, Korea Institute of Machinery and Materials, KRTC, Co.(in Korean)
- X.G. He, A.K.H. Kwan (2001) Modeling dowel action of reinforcement bars for finite element analysis of concrete structures, Computers and Structures, Vol. 79, pp. 595-604. https://doi.org/10.1016/S0045-7949(00)00158-9
- W.W. Walker, J.A. Holland (1998) Dowels for the 21st century - Plate dowels for slabs on ground, Concrete International, July, pp. 32-38.
- J. Otero, J. Martinez, M.A. de los Santos, S. Cardona (2012) A mathematical model to study railway track dynamics for the prediction of vibration levels generated by rail vehicles, Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 225(1), pp. 62-71.