Pressure gauge calibration table reliability evaluation method based on Bayesian correction model

Abstract

The invention discloses a pressure gauge calibration table reliability evaluation method based on a Bayesian correction model. The method comprises the following steps: establishing a fault characteristic index system capable of representing a pressure gauge calibration table; constructing an accident tree model of the pressure gauge calibration console; establishing a BN model graph of the pressure gauge calibration console, and directly mapping the FTA model graph into the BN model graph through a graph mapping method; determining a prior probability of a bottom event and a conditional probability between layers; correcting the Bayesian model according to the actual situation; calculating a failure probability; and calculating the posterior probability of the bottom event, and searchingthe maximum risk bottom event causing failure. Compared with a traditional simplex qualitative and simplex quantitative reliability evaluation method, the method has the advantages that the accuracy is high; fuzzy mathematics and quantitative data analysis are fused, the defects that qualitative analysis lacks data support and pure data analysis is too absolute are overcome, and compared with a traditional Bayesian network model, the variable correction process of the Bayesian network is added, and the obtained evaluation result can be closer to the actual engineering situation.

Description

technical field

[0001] The invention relates to a reliability evaluation method of a pressure gauge calibration platform based on a Bayesian correction model, and belongs to the technical field of reliability evaluation. Background technique

[0002] With the rapid development of the economy and society, the rapid progress of science and technology has further driven the development of the chemical industry. In the rapid development of chemical enterprises, it is not difficult to find the existing problems. As far as the production safety of chemical enterprises is concerned, the safety accidents caused during production are very likely to pose a threat to the personal safety of the production personnel of chemical enterprises, thus triggering a series of negative reactions.

[0003] The chemical industry is a high-risk industry. The whole society is very concerned about the safety issues of the chemical industry, especially the explosions and the leakage of dangerous gases...

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