一种基于事故树的安全风险定量评估方法

摘要

To improve the existing assessment methods on security risk, a new method based on thc fault tree is proposed, which can be used in security quantialive assessment of the component for aireraft. Firstly the fault tree is denoted by probability importance degree, and the effect parameter of fault is obtained by using probability importance degree. And then the hazard degree of component for aircraft is calculated. The difficult problem on security quantitative assessment is also solved primarily,Its application is shown that the approach can fully verify the risk of component effect on flight security,%针对目前安全风险评估方法的不足,提出了基于事故树的飞机部件安全风险定量评估方法.首先采用布尔代数理论对事故树进行逻辑表述,通过概率重要度表示部件故障的后果严重度,在此基础上对飞机部件的危险度进行计算,解决了当前安全风险定量评估的难题.实例证明,该方法能够较为准确地检验飞机部件对飞行安全的影响.