한국주조공학회지 (Journal of Korea Foundry Society)

  • 제21권1호
  • /
  • Pages.41-47
  • /
  • 2001
  • /
  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
권호 표지

Cellular Automaton법을 이용한 주물의 응고조직 시뮬레이션에의 적용

Application of Solifidification Grain Structure Simulation for the Casting by Cellular Automaton Method

  • 조인성 (연세대학교 철강연구소) ;
  • Cho, In-Sung (Research Institute of Iron and Steel Technology, Yonsei University) ;
  • Ohnaka, Itsuo (Department of Adaptive Machine Systems, Faculty of Engineering, Osaka University)
  • 발행 : 2001.02.20
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초록

본 연구에서는 FDM법과 CA법을 결합하여 주물의 응고조직성장 예측 프로그램을 개발하였다. 새로운 농도장 분포 알고리즘을 개발하고, 이 결과를 1차원 해석해와 비교하였으며, 이를 2차원 응고조직 및 농도계산에 적용하였다. 3차원 응고조직 예측 해석연구를 통하여 복잡한 형상의 주물에 적용 하였으며, turbine blade형상의 응고조직 시뮬레이션을 통하여 인출속도가 응고조직에 미치는 영향에 대하여 조사하였고, 원하는 주조조업변수를 본 시뮬레이션에 의하여 결정할 수 있으리라 생각된다.

Computer simulation of the solidification grain structure was applied to the casting process by using CA-DFDM. The Direct Finite Difference Method (DFDM) for temperature field calculation and latent heat treatment was coupled with Cellular Automaton (CA) method for the grain growth. 2-dimensional simulation of the solidification grain structures and calculation of the concentration fields were carried out and the calculated concentration distributions were compared with exact solution. Castings having complex geometries such as turbine blades were applied for 3-dimensional CA-DFDM. Effects of grain selector and mold extraction speed on the solidification grain structures in the turbine blade were examined.

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참고문헌

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