한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제23권4호
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  • Pages.42-49
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  • 2019
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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터보엔진 구성품용 스프링의 저장 신뢰성 평가

Storage Reliability Assessment of Springs for Turbo Engine Components

  • Chang, Mu-Seong (Department of Reliability Assessment, Korea Institute of Machinery and Materials) ;
  • Lee, Choong-Sung (Department of Reliability Assessment, Korea Institute of Machinery and Materials) ;
  • Park, Jong-Won (Department of Reliability Assessment, Korea Institute of Machinery and Materials) ;
  • Kim, You-Il (The 4th R&D Institute, Agency for Defense Development) ;
  • Kim, Sun Je (The 4th R&D Institute, Agency for Defense Development)
  • 투고 : 2018.12.23
  • 심사 : 2019.05.21
  • 발행 : 2019.08.01
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초록

본 연구에서는 가속열화시험을 이용하여 터보엔진 구성품용 스프링의 저장 신뢰도를 예측하는 방법을 제시한다. 스프링의 신뢰성 평가 절차를 먼저 수립한 후, 스프링의 성능열화특성은 스프링 상수로 선정한다. 또한 스프링 상수를 노화시키는 가속 스트레스 인자는 온도로 결정한다. 본 연구에서는 터보엔진에 사용되는 스프링에 대해서 3가지 온도 조건에서 시험을 실시하며, 각각의 온도 조건에서 스프링의 노화 상태를 확인하기 위해 주기적으로 스프링 상수를 측정한다. 스프링의 고장시간은 열화모델을 이용하여 예측하며, 최종적으로 고장시간과 가속모델을 이용하여 사용조건에서 스프링의 저장 수명을 예측한다.

This paper presents a method to predict the storage reliability of springs for turbo engine components based on an accelerated degradation test. The reliability assessment procedure for springs is established to proceed with the accelerated degradation test. The spring constant is selected as the performance degradation characteristic, the temperature is determined to be the stress factor that deteriorates the spring constant. The storage tests are performed at three temperature test conditions. The spring constant is measured periodically to check the degradation status of the springs. Failure times of the springs are predicted by using the degradation model. Finally, the storage lifetime of the springs at normal use conditions is predicted using an accelerated model and failure times of all test conditions.

키워드

참고문헌

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