This paper describes study of effectiveness of applying acoustic diagnosis to CBM(Condition Based Maintenance). We usually measure data of vibration of rotating machines with accelerometer to monitor the condition of it. This work is dangerous because we put the accelerometer near the rotating shaft of the machines by hand. Therefore we tried the non-contact sensing using a microphone of acoustic diagnosis and checked the data. As a result, we got the enou gh data for the monitoring safely.When rotating ma...
英字タイトル:
Acoustic diagnosis Improves work safety and reliability of CBM

This paper describes the outline of the guidelines on structural reliability evaluation for the passive components of the fast breeder reactor (FBR). The guidelines are now being prepared by the working group for the system based code in the Japan society of mechanical engineers. They consist of five chapters, which are “General rules”, “Reliability evaluation”, “Failure scenario setting”, “Modeling”, and “Failure probability calculation”, respectively. In the chapter of “Reliability evaluation”, the g...
英字タイトル:
Development of Guidelines for Structural Reliability Evaluation for FBR

Abstract This paper describes a procedure of structural reliability evaluation of passive components of fast breeder reactors for a failure due fatigue-creep interaction damage, and also reports results of benchmark evaluation conducted by using two independently developed codes. The s tructural integrity of a reactor vessel was evaluated deterministically and probabilistically. The results estimated by two codes agree well for oth of deterministic and probabilistic evaluations, which shows that these cod...
英字タイトル:
Benchmark Evaluation of Structural Reliability Evaluation Codes for FBR