External disturbance is an important cause of underground pressure pipeline damage,which leads to accidents,and it is crucial to study the risk of damage caused by external disturbance and come up with proper preventi...External disturbance is an important cause of underground pressure pipeline damage,which leads to accidents,and it is crucial to study the risk of damage caused by external disturbance and come up with proper prevention and control measures.We reviewed literature on risk identification of underground pressure pipelines damage due to external disturbance was conducted,and a list of risk factors was formed.Based on the list of risk factors,fault tree analysis was carried out on underground pressure pipelines damage caused by external disturbances,and risk prevention and control measures were proposed through the calculation of minimum cut sets,minimum path sets,and structural importance,in hopes of providing reference for the normal operation of underground pressure pipelines.展开更多
为了更科学地分析评估铁路快运货物在途安全风险,将二元决策图(Binary Decision Diagram,BDD)应用到风险故障树分析(Fault Tree Analysis,FTA)中,构建铁路快运货物损失风险评估模型.通过对快运货物损失情况统计,分析得出货物发生损失风...为了更科学地分析评估铁路快运货物在途安全风险,将二元决策图(Binary Decision Diagram,BDD)应用到风险故障树分析(Fault Tree Analysis,FTA)中,构建铁路快运货物损失风险评估模型.通过对快运货物损失情况统计,分析得出货物发生损失风险的直接因素,建立风险故障树.利用香农(Shannon)分解和ite结构选用合适的事件排序方法将故障树转化为BDD.以快运货物损坏风险为例,遍历BDD每个节点计算得出各底事件的概率(Birnbaum)测度和顶事件的发生概率,与FTA方法计算结果对比验证了该方法的正确性及在计算效率方面的优势.实验结果表明:包装质量、恶劣天气和货物对环境的高要求是导致铁路快运货物损坏的关键因素,并对此提出相应的改进措施.展开更多
基金This project was funded by Consulting Research Project of Chinese Academy of Engineering:Research on Innovative Development Strategy of Urban Safety Engineering(Project number:2020-02)。
文摘External disturbance is an important cause of underground pressure pipeline damage,which leads to accidents,and it is crucial to study the risk of damage caused by external disturbance and come up with proper prevention and control measures.We reviewed literature on risk identification of underground pressure pipelines damage due to external disturbance was conducted,and a list of risk factors was formed.Based on the list of risk factors,fault tree analysis was carried out on underground pressure pipelines damage caused by external disturbances,and risk prevention and control measures were proposed through the calculation of minimum cut sets,minimum path sets,and structural importance,in hopes of providing reference for the normal operation of underground pressure pipelines.
文摘为了更科学地分析评估铁路快运货物在途安全风险,将二元决策图(Binary Decision Diagram,BDD)应用到风险故障树分析(Fault Tree Analysis,FTA)中,构建铁路快运货物损失风险评估模型.通过对快运货物损失情况统计,分析得出货物发生损失风险的直接因素,建立风险故障树.利用香农(Shannon)分解和ite结构选用合适的事件排序方法将故障树转化为BDD.以快运货物损坏风险为例,遍历BDD每个节点计算得出各底事件的概率(Birnbaum)测度和顶事件的发生概率,与FTA方法计算结果对比验证了该方法的正确性及在计算效率方面的优势.实验结果表明:包装质量、恶劣天气和货物对环境的高要求是导致铁路快运货物损坏的关键因素,并对此提出相应的改进措施.