Reliability of Fatigue Life Predictions for Fixed Offshore Structures

고정식 해양구조물의 피로수명예측에 대한 신뢰성해석

  • 이재옥 (서울대학교 조선해양공학과) ;
  • 이현엽 (충남대학교 선박해양공학과) ;
  • 서용석 (삼성거제조선소 선박해양연구소) ;
  • 윤장호 (삼성거제조선소 선박해양연구소)
  • Published : 1998.05.01

Abstract

To evaluate the reliability against fatigue failure of offshore structures, a fatigue reliability analysis model based on the probabilistic approach has been developed. In this model, the simplified method is adopted as a fatigue analysis method. The uncertainties included in the fatigue analysis are considered as random variables and their statistical properties are evaluated as quantitatively as possible using existing data. As an example, the developed fatigue reliability model is applied to the jacket. And then the relative significance of each uncertainty on the probability of fatigue failure is surveyed.

해양구조물의 피로에 대해 확률론적으로 안전성을 평가하는 기법을 개발하기 위하여, 피로해석 과정에서 유입되는 불확실한 요소들을 검토하여 이들의 확률분포를 현재까지의 자료를 이용하여 최선으로 추정하였으며, 피로해석기법으로는 Simplified Method를 이용하여 피로신뢰성해석 모델을 개발하였다. 또한 실제의 자켓형 해양구조물을 대상으로 피로신뢰성 해석을 수행하였으며, 각 불확실성 요소가 피로수명에 미치는 영향을 파악하여 각 요소들의 상대적 중요성을 검토하였다.

Keywords

References

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