대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2001년도 춘계학술대회논문집A
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- Pages.262-267
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- 2001
열화된 증기 터빈블레이드의 피로강도에 대한 확률론적 해석
A Stochastic Analysis in Fatigue Strength of Degraded Steam Turbine Blade Steel
- 발행 : 2001.06.27
초록
In this study, the Reliability of degraded steam turbine blade was evaluated using the limited fatigue data. The statistical estimation of limited fatigue data implies that some unknown uncertainties which may be involved in fatigue reliability analysis. Therefore, an appropriate distribution in the fatigue strength was determined by the characteristic distribution - linear correlation coefficient, fatigue physics, error parameter. 3-parameter Weibull distribution is the most appropriate distribution to assume for infinite region. The load applied on the blade is mainly tensile. The maximum Von-Mises stress is 219.4 MPa at the steady state service condition. The failure probability(