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2013 Vol.15, Issue 3 Preview Page
A numerical study on rock cutting by a TBM disc cutter using SPH code

SPH 코드를 사용한 TBM 디스크커터의 암석 절삭에 대한 수치해석적 연구

Ho-Young Jeong1
,
Seok-Won* Jeon2*
,
Jung-Woo Cho3
정 호영1
,
전 석원*2*
,
조 정우3
1Graduate student, Department of Energy Systems Engineering, Seoul National University
2Professor, Department of Energy Systems Engineering, Seoul National University
3Senior researcher, Construction Equipment and Parts R&D group, Korea Institute of Industrial Technology
1서울대학교 에너지시스템공학부 박사과정
2서울대학교 에너지시스템공학부 교수
3한국생산기술연구원 대경권지역본부 건설기계부품연구그룹 선임연구원
*교신저자. *Corresponding Author. 
31 May 2013. pp. 345-356
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Abstract

Numerical simulation on rock cutting by a TBM disc cutter was carried out using SPH (Smoothed Particle Hydrodynamics) code. AUTODYN3D, a commercial software program based on finite element method, was used in this study. The three-dimensional geometry of a disc cutter and a rock specimen were modeled by Lagrange and SPH code respectively. The numerical simulation was carried out for Hwangdeung granite for 10 different cutting conditions. The results of the numerical simulation, i.e. the relation between cutter force and failure behavior, had a good agreement with those from LCM test. The cutter forces measured in the numerical simulation had 10% deviation from the LCM test results. Moreover, the optimum cutter spacing was almost identical with the experimental results. These results indicate that SPH code can be successfully used had applicability for simulation on rock cutting by a TBM disc cutter. However, further study on Lagrange-SPH coupled modelling would be necessary to reduce the computation time.

Keywords
TBM
Disc cutter
Cutter force
AUTODYN3D
SPH

본 연구에서는 SPH(Smoothed Particle Hydrodynamics) 코드를 사용하여 TBM에 장착되는 디스크커터에 의한 암석의 절삭 과정을 모사하였다. 이를 위하여 본 연구에서는 3차원 FEM 해석 상용프로그램인 AUTODYN3D를 사용하였으며 이를 통해 국내 황등화강암을 대상으로 총 25개의 절삭조건에 대한 수치적인 절삭시험을 수행하였다. 암석과 디스크커터를 각각 라그란지안 솔버와 SPH 솔버를 사용하여 3차원 형상으로 모델링 하고 두 개의 디스크커터가 순차적으로 암석을 절삭하도록 모델링 하였다. 수치해석과 LCM시험에서 측정한 디스크커터의 작용력은 오차 10%이내의 값을 보여 대체로 일치하는 것으로 나타났고 균열의 전파양상과 암석의 파쇄양상 또한 유사한 것으로 나타났다. 또한 절삭된 최적 커터간격을 측정한 결과 LCM시험 결과와 일치하였다. 이를 통해 SPH 코드를 사용한 수치해석기법의 적용성을 확인할 수 있었으나 해석시간을 단축하기 위한 Lagrange-SPH코드의 커플링에 관한 후속연구가 필요할 것으로 판단되었다.

키워드
TBM
디스크커터
커터 작용력
AUTODYN3D
SPH
References
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 15
  • No :3
  • Pages :345-356
  • Received Date : 2013-05-07
  • Revised Date : 2013-05-18
  • Accepted Date : 2013-05-27
  • DOI :https://doi.org/10.9711/KTAJ.2013.15.3.345
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