에너지공학 (Journal of Energy Engineering)

  • 제29권3호
  • /
  • Pages.25-33
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  • 2020
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  • 1598-7981(pISSN)
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  • 2713-7074(eISSN)
한국에너지학회 (The Korean Society for Energy)
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전산 시뮬레이션 기반의 위상최적설계에 의한 경량 밸브디스크의 구조적 안전성

Structural Safety of Lightweight Valve Disc by Topology Optimization Design based on Computational Simulation

  • 김태형 (청주대학교 항공학부 항공기계공학전공)
  • Kim, Taehyung (Major of Aeronautical & Mechanical Engineering, Division of Aeronautics, Cheongju University)
  • 투고 : 2020.08.21
  • 심사 : 2020.09.16
  • 발행 : 2020.09.30
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초록

본 연구에서는 유동해석 및 구조해석을 수행하여 위상최적화에 의해 설계된 버터플라이 밸브 디스크의 구조적 안전성을 살펴보았다. 유동해석을 수행하여 유량계수의 변화와 공동현상을 예측하였으며, 구조해석 후 강도 및 강성의 유효성을 확인하였다. 유동해석 후 열림각이 커질수록 유량계수가 비선형적으로 증가하다가 완만한 경사를 보였고, 열림각이 12o 일 때 공동화 현상을 예측할 수 있었다. 구조해석 후 경량 디스크의 유효응력이 재료의 항복강도보다 작았으며, 최대변형량도 선행연구의 보수적 변형량보다 작았다. 궁극적으로 전산해석에 기초한 경량 밸브 디스크의 구조적 안전성이 유효함을 확인하였다.

In this study, flow and structural computational analysis were performed to investigate the structural safety of the lightweight butterfly valve disc designed by topology optimization. After flow analysis, as the opening angle increased, the flow coefficient increased non-linearly and showed a gentle slop. When the opening angle was 12 degree, the cavitation could be predicted. After FE analysis, all FE von-Misses stresses of the lightweight disc were smaller than the yield strength of the material, and all FE maximum deformations were also smaller than the conservative deformation of the previous study. Ultimately, it was confirmed that the structural safety of the lightweight valve disc based on computational analysis is effective.

키워드

참고문헌

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