Stress-strength interference-based importance for series systems considering common cause failure
| Autor: | Yanwei Du, Fangyu Ren, Guangwei Yu, Li Yan |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Eksploatacja i Niezawodność – Maintenance and Reliability. 22:241-252 |
| ISSN: | 2956-3860 1507-2711 |
| DOI: | 10.17531/ein.2020.2.7 |
| Popis: | Series systems, whose structures are simple, are widely discovered in practical engineering, but the interdependency between the components is complex, such as common cause failure. With the consideration of the components’ strength, this paper focuses on ranking the importance measure of components considering the common cause failure based on the stress-strength interference (SSI) model. The weakest component can be identified by integrating the SSI model with the importance measure when the strength mean and variance of the component under the load stress is known. Firstly, the analytic methods are proposed to calculate the SSI-based importance of components in the series systems. Then, the monotonicity of SSI-based importance is analyzed by changing the strength mean or strength variance of one component. The results show that the SSI-based importance of components, whose parameters are changed, will reduce monotonically with the increase of strength mean or increase monotonically with the increase of strength variance. Finally, a component replacement method is developed based on the rules that both the importance of replaced component and the importance ranks should be unchanged after the replacement. SSI-based importance can help engineers to make maintenance decisions, and the component replacement method can increase the diversity of spare parts by finding the equivalent components. |
| Databáze: | OpenAIRE |
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