A new model for the optimization of periodic inspection intervals with failure interaction: A case study for a turbine rotor

Case studies in engineering failure analysis Pub Date : 2017-10-01 DOI:10.1016/j.csefa.2015.10.001

Esmaeil Rezaei

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引用次数: 28

Abstract

Inspection is one of the important activities to detect and fix failures in repairable system. Optimization of inspection intervals has critical role in maintenance cost and operating system. When a component fails, it is renewed or repaired. A great deal of periodic inspection research is for hidden failure and considered one of the perfect (renew) and minimal repair policies. In literature, the lack of simultaneous consideration of both perfect and minimal repair in reliability model has been observed. This study presents new reliability model by synchronous consideration of both minimal and perfect repair. As well as, the expected total maintenance cost is presented and modeled to figure out the optimal inspection interval. The proposed model is more comprehensive model in reliability evaluation and can be applied in different pertinent problems. The model is applied to steam turbine system which the rotor considered as soft component and filter as hard component. The result revealed that the system should be inspected every 12 month.

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考虑故障交互作用的定期检查间隔优化新模型——以某涡轮转子为例

检测是可修系统检测和修复故障的重要活动之一。检测间隔的优化对维护成本和运行系统有着至关重要的作用。当一个部件出现故障时，它会被更新或修理。大量的定期检查研究是针对潜在的故障，并被认为是完美(更新)和最小修理策略之一。在文献中，已经观察到可靠性模型中缺乏同时考虑完美修复和最小修复。提出了一种同时考虑最小修复和完全修复的可靠性模型。同时，提出了期望总维修成本，并建立了模型，计算出最优的检修间隔。该模型是一种较为全面的可靠性评估模型，可应用于不同的相关问题。该模型应用于以转子为软构件、过滤器为硬构件的汽轮机系统。结果显示，该系统应每12个月检查一次。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Case studies in engineering failure analysis

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