THE IMPROVEMENT RESEARCH OF ACCIDENT GENERATION MECHANISM OF DYNAMIC EVENT TREE

摘要

Accident generation mechanism is a very important part of the dynamic reliability methodologies. CCMT and DET are two well known dynamic methods. The accident generation mechanism of them is base on the fixed time step, this mechanism has two remarkable deficiencies, one is that it unable to accurately consider the occurrence time of demand conversion; another is that if the time step is long, the traditional mechanism unable to treat the possible twice or even more demand conversion. In order to overcome these deficiencies, the paper proposed a new algorithm which evolved both time and processing variable. The basic principle is provided, some common problems are also discussed. At last, the computer execution algorithm is advanced, and a example system is provided to demonstrate the power of new mechanism. The analysis results show that the new mechanism is effective.