关键词: 多重故障, 多色集合, 故障模式与影响分析, 底事件

Abstract: To analyze the multiple failures, a kind of hierarchical multiple failures expression model based on the mechanism of function failure was constructed according to the mapping relationship between failure mode and function element. This expression model was formally described in mathematical language to make it readily manipulated by computers through using the polychromatic sets. Then, using the reasoning matrix between the unit color and individual color of the polychromatic sets, the reasoning of the basic events of the fault was obtained, and the methods and processes of the reasoning were also presented. Finally, a case study of the steam turbine was used to illustrate the proposed model and approach.

Key words: multiple failures, polychromatic sets, failure mode and effect analysis, basic events