基于相似證據(jù)理論的FTA模型研究與應(yīng)用
[Abstract]:Accident tree analysis is a widely used method in safety evaluation. However, how to evaluate the probability range of basic events is always a difficult point in quantitative analysis. Traditional accident tree analysis relies too much on statistical data. It also restricts the development of accident tree analysis method. In order to effectively fuse the multi-expert opinion information in accident tree analysis, a fault tree analysis model based on similarity analysis is proposed in this paper. Firstly, the concept of similarity in data fusion is introduced to analyze the similarity between several expert opinions, and each expert's opinion is assigned credibility weight according to the analysis results. Then, the expert opinion is synthesized by using the evidence theory to predict the probability of the system accident, and the importance of the basic event that causes the top event is determined. Finally, a quantitative analysis model of accident tree for explosion of gas tank of a certain iron and steel group is established, and the probability of top event is obtained, and the most dangerous path leading to the accident is found out, which provides a reference for managers to formulate targeted measures. At the end of this paper, the research work of the full text is summarized, the focus of the future research is put forward, and the place that the gas tank explosion accident tree compiled in this paper needs to be improved is pointed out. And the necessity of further research on evidence theory algorithm. Finally, the research direction of combining evidence theory algorithm and accident tree quantitative analysis in the future is prospected.
【學(xué)位授予單位】:武漢科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TQ086;TQ547.91
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