Aerospace Engineering and Technology (항공우주기술)

Korea Aerospace Research Institute (한국항공우주연구원)
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Structural Evaluations of the Bellows for a Gas-generator Lox Shut-off Valve

가스발생기 산화제 개폐밸브 주름관 구조 평가

  • 유재한 (한국항공우주연구원 미래로켓연구팀) ;
  • 이중엽 (한국항공우주연구원 미래로켓연구팀) ;
  • 이수용 (한국항공우주연구원 미래로켓연구팀) ;
  • 임형태 (과학기술연합대학원 대학교 발사체시스템공학)
  • Received : 2012.01.19
  • Accepted : 2012.07.01
  • Published : 2012.07.01
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Abstract

The structural analyses and experimental results for the bellows of a gas-generator liquid oxygen shut-off valve were presented. The bellows experiences axial compression and external high pressure loadings at cryogenic temperatures. The analyses were performed using EJMA (Expansion Joint Manufacturing Association) standard and the commercial FE (finite element) analysis program, Abaqus v6.9, at room and cryogenic temperatures. The spring modulus, the induced stress and the expected fatigue life of the bellows were compared respectively. The effects by the contact and the material plasticity on the FE analysis results were also analyzed. Also, FE analyses related to a burst test were presented.

가스발생기 산화제 개폐 밸브에 사용되는 주름관의 구조 해석 및 시험이 수행되었다. 이 주름관은 극저온에서 압축 변위와 높은 외압 하중을 받는다. 구조 해석은 상온 및 극저온에서 EJMA (Expansion Joint Manufacturing Association) 표준 및 상용 유한 요소 해석프로그램인 Abaqus v6.9를 이용하여 수행되었다. 스프링 강성, 응력 및 피로 수명 해석 결과들이 비교되었고 유한 요소 해석 결과에서 접촉 및 재질의 소성에 의한 영향을 살펴보았다. 또한 파열 시험과 관련된 유한 요소 해석 결과도 제시되었다.

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References

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