Fault tree analysis method taking failure transition and failure mode common cause into account

Abstract

The invention discloses a fault tree analysis method taking the failure transition and failure mode common cause into account, which comprises the following steps: analyzing independent irrelevance of basic events on the same layer; establishing grading standards of limit relevant parameters of the intermediate layer event and key bottom event; performing relevance model composition based on basic attributes of the basic events and the classification method of the basic events; performing failure mode common cause failure analysis under the effect of a random disturbance source; performing probability analysis of fault treetop events of the failure mode series system by taking the common cause failure into account. The calculation result is accurate by adopting the analysis method disclosed by the invention, and the preparation method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of fault analysis and relates to a fault tree analysis method considering failure transmission and failure mode common cause. Background technique [0002] The hazards and corrosion hazards of pipeline third-party hazards to the safe operation of pipelines have become the main threats faced by pipeline operating companies. The main failure modes of pipeline third-party hazards are perforation and construction rupture. security analysis. Based on the fragility theory, this research first analyzes the probability of third-party hazard events in pipelines. For the analysis of such events, the fault tree fuzzy analysis method is particularly necessary and accurate without classical analytical methods and numerical simulations. The traditional fault tree analysis method uses fuzzy numbers to describe the probability of event occurrence (failure rate), which avoids the difficulties encountered by analysts in orde...

AI Technical Summary

Problems solved by technology

The traditional fault tree analysis method uses fuzzy numbers to describe the probability of event occurrence (failure rate), which avoids the difficulties encountered by analysts in order to obtain the accurate value of the event occurrence probability. The traditional fault tree analysis method is based on the minimum cut of fault tree The analysis is based on the idea that the sets are independent and the minimum cut sets are independent of each other, and the analysis that ignores the correlation violates the basic law that everything in the world is interconnected, and its analysis system that does not consider the correlation has proved to have great limitations

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