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Evaluation of reliability and safety for an underwater dry maintenance cabin

机译：水下干维修舱的可靠性和安全性评估

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摘要

Effectiveness of an underwater dry maintenance cabin (UDMC) is mainly determined by its reliability, availability and safety. In this paper, the reliability and safety of a UDMS is evaluated qualitatively and quantitatively via fault tree analysis (FTA). According to the composition, mission characteristic and operational condition of the UDMC, three kinds of typical failure patterns are identified. All ultimate causes, or combination of causes that are responsible for or contribute to the top events, are recognized via FTA. Then, based on minimum cut sets, probability of system failure is calculated by numerical simulations which show that UDMC is of high reliability and safety. Moreover, with the aid of theory of the critical importance, the weak links of the system, which are required in making an effective preventative maintenance strategy, are identified. Finally, suggestions to improve the reliability and safety of the UDMC are proposed1.
机译：水下干燥维护舱（UDMC）的有效性主要由其可靠性，可用性和安全性决定。在本文中，通过故障树分析（FTA）定性和定量地评估UDM的可靠性和安全性。根据UDMC的组成，使命特征和操作条件，鉴定了三种典型故障模式。所有最终的原因或负责或贡献顶部事件的原因组合都是通过FTA认可的。然后，基于最小切割集，系统故障的概率通过数值模拟计算，这表明UDMC具有高可靠性和安全性。此外，借助于临界理论，确定了制造有效预防性维护策略的系统的弱链路。最后，提出了提高UDMC的可靠性和安全性的建议 1 。

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