An improved safety analysis based on the causality diagram for the complex system of micro aero-engines is presented.The study is examined by using the causality diagram in analytical failure cases due to rupture or p...An improved safety analysis based on the causality diagram for the complex system of micro aero-engines is presented.The study is examined by using the causality diagram in analytical failure cases due to rupture or pentration in the receiver of micro turbojet engine casing,and the comparisons are also made with the results from the traditional fault tree analysis.Experimental results show two main advantages：（1）Quantitative analysis which is more reliable for the failure analysis in jet engines can be produced by the causality diagram analysis;（2）Graphical representation of causality diagram is easier to apply in real test cases and more effective for the safety assessment.展开更多
采用数值模拟与概率统计相结合的方法研究海上浮式风机基础-塔柱系统风险。以NREL OC4半潜型浮式风机为例,建立风机基础-塔柱系统故障树。采用有限元方法计算基础-塔柱系统结构失效概率,结合OREDA数据库和已有研究,确定浮式风机基础-塔...采用数值模拟与概率统计相结合的方法研究海上浮式风机基础-塔柱系统风险。以NREL OC4半潜型浮式风机为例,建立风机基础-塔柱系统故障树。采用有限元方法计算基础-塔柱系统结构失效概率,结合OREDA数据库和已有研究,确定浮式风机基础-塔柱系统的其他失效概率。采用MATLAB语言编写时域动态故障树分析(Fault Tree Analysis,FTA)程序,考虑有/无维修两种情况,定量计算该浮式风机基础-塔柱系统在全服役周期内的失效概率,并给出相应的维修策略。展开更多
文摘An improved safety analysis based on the causality diagram for the complex system of micro aero-engines is presented.The study is examined by using the causality diagram in analytical failure cases due to rupture or pentration in the receiver of micro turbojet engine casing,and the comparisons are also made with the results from the traditional fault tree analysis.Experimental results show two main advantages：（1）Quantitative analysis which is more reliable for the failure analysis in jet engines can be produced by the causality diagram analysis;（2）Graphical representation of causality diagram is easier to apply in real test cases and more effective for the safety assessment.
文摘采用数值模拟与概率统计相结合的方法研究海上浮式风机基础-塔柱系统风险。以NREL OC4半潜型浮式风机为例,建立风机基础-塔柱系统故障树。采用有限元方法计算基础-塔柱系统结构失效概率,结合OREDA数据库和已有研究,确定浮式风机基础-塔柱系统的其他失效概率。采用MATLAB语言编写时域动态故障树分析(Fault Tree Analysis,FTA)程序,考虑有/无维修两种情况,定量计算该浮式风机基础-塔柱系统在全服役周期内的失效概率,并给出相应的维修策略。
