Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Application of the Absorbing Boundary Condition in Moving Force Analysis of Asphalt Concrete Track

흡수경계조건의 아스팔트 콘크리트 궤도 동적 해석에의 적용

  • Received : 2015.09.21
  • Accepted : 2015.12.23
  • Published : 2016.02.29
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Abstract

In this study, the absorbing boundary condition was adopted to prevent elastic wave propagation due to abrupt load condition changes in moving force analysis. It was proven to be effective in reducing inappropriate noise components. Furthermore, to verify whether fixed point excitation in a laboratory test can simulate train movement effectively, the results of dynamic analysis for fixed point excitation and moving force conditions were analyzed. The dynamic stability of an asphalt track structure under a KTX train condition was also studied. Additionally, the dynamic safety of asphalt tracks was verified by comparing the results of a moving force analysis under a KTX train load and a quasi-static analysis under the design standard Korean train load.

이 연구에서는 흡수경계조건을 적용하여 경계부분에서 발생한 갑작스런 하중조건의 변화에 의해 발생한 탄성파의 전달 및 반사현상을 감소시키고자 하였으며, 흡수경계조건이 사용 유무에 따른 효과를 검증하였다. 또한, 정점하중재하의 경우와 이동하중에 의한 동적해석결과를 비교함으로써 정점하중재하가 이동하중을 적절히 표현할 수 있는가의 여부를 분석하였다. 주행속력의 변화에 따른 KTX 열차조건에서의 이동하중에 의한 동적해석을 수행하여 아스팔트 콘크리트 궤도에서의 동적안정성을 검토하였으며, 준정적인 표준 열차하중에 의한 해석결과를 비교함으로써 아스팔트 콘크리트 궤도의 구조 안전성을 확인하였다.

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References

  1. S.H. Lee, J.W. Lee, H.M. Lee (2015) Optimal section of ballasted asphalt track considering design lifetime and economic feasibility, Journal of the Korean Society for Railway, 18(3), pp. 241-251. https://doi.org/10.7782/JKSR.2015.18.3.241
  2. S.H. Lee, J.W. Lee, H.M. Lee (2015) Behavior characteristics of ballasted track on asphalt roadbed using real scale test, Journal of the Korean Society for Railway, 18(3), pp. 252-260. https://doi.org/10.7782/JKSR.2015.18.3.252
  3. S.H. Lee, J.W. Lee, Y.J. Lim (2013) Development of asphalt track system suited to speed-up, The Magazine of the Korean Society of Civil Engineers, 61(11), pp.10-17.
  4. B. Lichtberger (2005) Track Compendium. Formation, Permanent Way, Maintenance, Economics, Eurail Press, pp. 309-311.
  5. EAPA (2003) Asphalt in railway tracks, European Asphalt Pavement Association, October 2003, pp. 7-10.
  6. C. Esveld (2001) Modern Railway Track(2nd Edition), MRT-Productions, 2001, pp. 245-246.
  7. Y.H. Huang, J.G. Rose, C.J. Kooury (1987) Thickness design for hot-mix asphalt railroad trackbeds, Asphalt Paving Technology, 56, pp. 427-453.
  8. Andreas H. Nielsen (2006) Absorbing boundary conditions for seismic analysis in ABAQUS, ABAQUS User's Conference, Cambridge, MA USA, pp. 359-376.
  9. Cathal Bowe (2009) Dynamic Interaction of trains and railway bridges using wheel rail contact method, Ph.D. Thesis, National University of Ireland.
  10. L. Jingbo, G. Yin, W. Yan, L. Bin (2006) Efficient procedure for seismic analysis of soil-structure interaction system, Tsinghua Science and Technology, 11(6), pp. 625-631. https://doi.org/10.1016/S1007-0214(06)70244-9
  11. S. Parkash (2004) Transmitting boundaries for transient elastic response in soil-structure interaction system, 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada.
  12. S. Parkash, S. Thakkar (2004) Cone boundaries for dynamic problems of 3-d half space, 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada.
  13. Korea Railway Network Authority (2012) Railway design guidance and manual, Ballasted Track, KR C-14030.