top event meaning in Chinese
故障树的顶事件
Examples
- The probability and unconditional failure intensity of top event was computed in the quantitative analysis of fta based on bdd
在基于bdd的故障树定量分析研究中，实现了顶事件发生概率和绝对失效强度的求解。 - This thesis focuses on techniques of dynamic fault tree in system reliability modeling and its qualitative and quantitative analysis . it studies bdd solution for static sub trees 、 markov chain solution for dynamic sub tree briefly and the modularization of dynamic fault tree ; presents the algorithm for top event occurrence rate of dynamic fault tree based on weibull distribution . then this thesis presents a new approach to solve top event occurrence rate and a new generation algorithm of minimal cut sequence of dynamic fault tree that deviate from markov model completely
本文着眼于动态故障树在系统可靠性建模及定性定量分析中的技术,研究了基于bdd的静态子树分析方法、基于马尔可夫模型的动态子树分析方法以及动态故障树模块化方法,并提出了基于威布尔分布的动态故障树顶事件发生概率计算方法;提出了一种完全脱离马尔可夫模型的求解动态故障树顶事件发生概率的方法和一种最小顺序割集的生成方法。 - A lot of papers about the report of probabilistic risk assessment of daya bay npp and system manuals has been read by the author and let as the basis . in this paper , based on the reliability analysis methods of failure mode and effect analysis and failure tree analysis , according to the result of event tree analysis of probabilistic risk assessment report of daya bay npp , the top events of the fault trees of reactor protection system and the success criteria were established . by using risk - spectrum procedure , the unavailability and the minimal cut - sets ( mcs ) of the fault trees were obtained
本文在阅读了大量的大亚湾核电站pra报告和各种系统手册等资料的基础上，采用fmea (故障模式和影响分析)和fta (故障树分析)可靠性分析方法，依据大亚湾核电站pra事件树分析的结果，建立了以紧急停堆失效和专设安全设施驱动失效为顶事件的故障树，利用risk - spectrum程序，对所建的故障树进行定量分析，计算，得到系统故障树的失效概率和最小割集，从而为大亚湾核电站可视化风险分析软件提供数据支持。 - Based on research of theory and methods , this thesis presents design scheme of the dynamic fault tree analysis platform dfta and implement the platform ; practices a dynamic fault tree analysis example of boeing 707 plane engine oil indication system and alarm system on the platform and gets top event occurrence rate 、 minimal cut sequence 、 probability importance sequence 、 structure importance sequence and critical importance sequence and presents system improvement suggestion based on the analysis results
在理论方法研究的基础上,本文提出了动态故障树分析平台dfta的设计方案,并进行了实现;利用该软件对波音707飞机发动机滑油压力指示和警告系统进行了动态故障树实例分析,得到了顶事件发生概率、最小顺序割集、概率重要度排序、结构重要度排序、关键重要度排序等分析结果,并根据上述分析结果提出了系统设计改进建议。 - This paper presents the conversion from dynamic logic gate to markov chain , the solution of dynamic subtree top event failure probability and the method of obtaining the failure mode of subsystem using markov model , that is sequence cutsets of the dynamic subtree . the typical approach to importance analysis of component is impractical for large systems in markov model , so this paper also provides a simple and intuitionistic graph solution based on markov chain
论文研究了动态逻辑门向马尔可夫链的转化方法，利用马尔可夫链法求解动态子树顶事件概率，以及通过马尔可夫状态转移图直接找出子系统的故障模式和薄弱环节，即得到动态子树的顺序割集。