OS6-12 蒸気タービンケーシングのクリープ疲労に関する余寿命診断研究(OS6 設備診断・運用保全技術,分散と集中の共存)

概要

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In the near future, the aged thermal power plants will be operated with many start-stop, thus under severe condition. Therefore, the proper management of the remaining life of high temperature-pressure equipment is important. Under this circumstance, damage factors are not only creep but also fatigue. Because creep-fatigue phenomenon has been reported to influence equipment on its life more than individually creep or fatigue, the analysis for this should be conducted. We have been studied on a creep-fatigue evaluation method based on the non-linear cumulative damage law, which is more accurate than conventional ones. The novel method was verified in the experiments and in the applications to actual equipments. This report describes the obtained results in these investigations.
2006-06-28