舶用ディーゼル機関とメカトロニクスの信頼性・安全性評価

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The evaluation indices of the reliability and safety are extremely important for user and producer of ship industry. The reliability indices can give a range of some concrete desired values that satisfies with economic dfficiency and continuous running ability. Especially the safety index provides an economical running guidance. If the above evaluation indices can set up, some important guidelines can give to both the users and producers. On the other hand, a reliable improvement goes on a marine diesel engine and a mechatronics, and safety also is tending upward. However, it is difficult to say that reliable improvements of total systems are going up. According to a great number of the field data that collected from Mo Diesel Ship (131 rears-vessel), the reliability and safety in a ship evaluation during 1983-88 changed as follows. 1. The total manning index MI, which means a maintainability, of 1000 hours, and also failure rate per 1000 hrs times man hour per case, decreased to about 60% within 6 years with respect to a total engine system. 2. MI in a general failure and heavy ones decreased from 73 to 43 and from 19 to 11 individually for the total system. 3. MI in both failures of two subsystems of of main engine and auxiliary machine failures occupied a half of all and each MI decreased to 66% in 6 years. The availability that is picked up as the index of safety, has been decreasing as the average number of operator decreases since the second surveyed period in 1984-85. The unavailability is deteriorating with 0.13-0.18% conversely, although 0.09% are indicated in 1985.
社団法人日本マリンエンジニアリング学会の論文

舶用ディーゼル機関とメカトロニクスの信頼性・安全性評価

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