Reliability Analysis and Maintenance Engineering of Anti-rear Device Based on Fuzzy FMECA

In this paper, in order to improve the comprehensive reliability of the ship and improve its maintenance engineering, the domestic anti-rear device of a marine ship in China is taken as the research.The system structure and working principle of the anti-rear device of the naval gun are analyzed. Compared with the previous FMECA method, which is difficult to obtain quantitative results after partial fuzzy description, a fuzzy comprehensive evaluation method is used to improve the FMECA method to form a fuzzy FMECA method in this paper. The selection principle of reliability key parts and the quantitative risk analysis of process failure mode are given. The functional FMECA table is obtained through fault mode data analysis. The results show that the highest damage in the manufacture of the control rod is the roughness in the grinding process.It also shows that the fuzzy FMECA is effective and has a positive effect on improving the reliability of the system. Improvement measures are proposed for this failure mode,at the same time, the maintenance engineering of the anti-rear device of the naval gun is also given.