Failure mode and effects analysis of equipment based on grey theory
Based on the uncertainty problem of decision factors in the fault diagnosis and maintenance of equipment,the fuzzy method and grey theory were introduced.Firstly,fuzzy terms were applied to describe the basic variables (probability of occurrence,severity and detection).Triangular fuzzy number was selected to carry out the quantitative calculation of fuzzy terms and the defuzzification of membership functions.Then the grey correlations of all Failure modes were computed and risks were ranked,considering the relative importance of decision factors.The fuel system of marine diesel engine was taken as an example.It is pointed that although the risk priority numbers are equal,if the values or weights of decision factors are different,then the risk levels of Failure modes are different as well.The results indicate that the calculation model can identify the failures of ship equipment more precisely and optimize allocation of maintenance resources.
Equipment Failure mode and effects analysis Fuzzy Grey correlation Maintenance
Zhendong Tan Zunfeng Du
Military Transportation Institute of the General Logistics Department,Tianjin 300161,China School of Civil Engineering,Tianjin University,Tianjin 300072,China
国际会议
济南
英文
763-766
2012-12-29（万方平台首次上网日期，不代表论文的发表时间）