共模分析方法及其在民机设计中的应用研究

摘要

Safety is one of the most significant considerations in the civil aircraft design. Based on analysis of the independence between elements or events, Common Mode Analysis is also used to guarantee the safety of the design object. The procedure of Common Mode Analysis is introduced in this paper, listing the common failure sources and its failure modes in detail. Furthermore, the“AND-GATE” method and“SHORT-CUT” method of the Com-mon Mode Analysis are presented. By an real example of a pressurized compartment door, two methods are ana-lyzed in a mechanism system,which were used for Common Mode Analysis. And the relevant conclusions are given.%安全性是民机设计中最重要的考虑要素之一。作为安全性评估的重要手段，共模分析是通过对元件或事件之间的独立性进行分析，来保证设计对象的安全性。对共模分析的工作流程进行了说明，详细列出了需要考虑的共模失效源及失效模式。介绍了共模分析的与门方法和割集方法，并通过某型民用飞机舱门设计实例说明了在机械系统中如何通过这两种方法进行共模分析，同时给出了相关结论。