Reliability analysis of the inspected and repaired structure requires dealing with a large number of complex random events. Considering many kinds of random factors, a probability of these random events existing possi...Reliability analysis of the inspected and repaired structure requires dealing with a large number of complex random events. Considering many kinds of random factors, a probability of these random events existing possibly in the inspection and repair process and reliability analysis methodologies are proposed. A systematic dynamic reliability model is given for structures in service under the scheduled inspection and repair.展开更多
The evaluation of maintainability growth plays an important role in improving materiel system effectiveness. Based on field maintenance information, a maximum likelihood model is put forward to evaluate the maintainab...The evaluation of maintainability growth plays an important role in improving materiel system effectiveness. Based on field maintenance information, a maximum likelihood model is put forward to evaluate the maintainability growth at the system level and sub-system level. A maximum likelihood function can be built after all the maintenance data can be divided into the following three categories： incomplete repair time data, complete repair time data, super-complete repair time data. According to the actual situation of the maintenance data, an appro- priate approximation can be made and the approximate analytical solution can be obtained. The values of u and can be obtained as the corresponding estimated value of unknown parameters. By effectively mining the latent sampie information, the maintainability growth evaluation is logical and reasonable.展开更多
A engineering system is usually repairable, and failure process of a repairable by a failure point process. The power law model is a commonly used approach to model syst the em is often described failure point process...A engineering system is usually repairable, and failure process of a repairable by a failure point process. The power law model is a commonly used approach to model syst the em is often described failure point process. This paper introduces the concept and model for the failure process of repairable system. The method of parameter estimation is developed, and failure observations are fitted into a power-law model by using the least square method. Two applications of the pressent model are discussed according to the practical failure data of the central cooling system of a nuclear power plant. One application is determining the optimal overhaul time, and the other is evaluating the quality of maintenance. This paper provides references for the overhaul decision making and maintenance quality evaluation in reality.展开更多
为满足轨道交通装备服役周期运用维修保障的安全性和可靠性要求,设计并实现了面向服役周期管理的轨道交通装备维修、修理、大修和运行保障(MRO,Maintenance,Repair and Overhaul/Operation)系统。文章给出了该系统的总体架构和技术架构...为满足轨道交通装备服役周期运用维修保障的安全性和可靠性要求,设计并实现了面向服役周期管理的轨道交通装备维修、修理、大修和运行保障(MRO,Maintenance,Repair and Overhaul/Operation)系统。文章给出了该系统的总体架构和技术架构,融合基于物料清单(BOM,Bill of Materials)的服役周期数据贯通等技术,设计了配置管理、服务管理、检修管理、物资管理等4个功能模块,实现贯穿现场服务和检修业务主线的轨道交通装备服役周期管理。该系统在株洲中车时代电气股份有限公司进行了现场应用。应用情况表明,该系统可有效提升装备服役周期管理及技术服务能力,有力支撑企业服务数字化转型。展开更多
文摘Reliability analysis of the inspected and repaired structure requires dealing with a large number of complex random events. Considering many kinds of random factors, a probability of these random events existing possibly in the inspection and repair process and reliability analysis methodologies are proposed. A systematic dynamic reliability model is given for structures in service under the scheduled inspection and repair.
文摘The evaluation of maintainability growth plays an important role in improving materiel system effectiveness. Based on field maintenance information, a maximum likelihood model is put forward to evaluate the maintainability growth at the system level and sub-system level. A maximum likelihood function can be built after all the maintenance data can be divided into the following three categories： incomplete repair time data, complete repair time data, super-complete repair time data. According to the actual situation of the maintenance data, an appro- priate approximation can be made and the approximate analytical solution can be obtained. The values of u and can be obtained as the corresponding estimated value of unknown parameters. By effectively mining the latent sampie information, the maintainability growth evaluation is logical and reasonable.
基金supported by the National Natural Science Foundation of China(71771029)
文摘A engineering system is usually repairable, and failure process of a repairable by a failure point process. The power law model is a commonly used approach to model syst the em is often described failure point process. This paper introduces the concept and model for the failure process of repairable system. The method of parameter estimation is developed, and failure observations are fitted into a power-law model by using the least square method. Two applications of the pressent model are discussed according to the practical failure data of the central cooling system of a nuclear power plant. One application is determining the optimal overhaul time, and the other is evaluating the quality of maintenance. This paper provides references for the overhaul decision making and maintenance quality evaluation in reality.
文摘为满足轨道交通装备服役周期运用维修保障的安全性和可靠性要求,设计并实现了面向服役周期管理的轨道交通装备维修、修理、大修和运行保障(MRO,Maintenance,Repair and Overhaul/Operation)系统。文章给出了该系统的总体架构和技术架构,融合基于物料清单(BOM,Bill of Materials)的服役周期数据贯通等技术,设计了配置管理、服务管理、检修管理、物资管理等4个功能模块,实现贯穿现场服务和检修业务主线的轨道交通装备服役周期管理。该系统在株洲中车时代电气股份有限公司进行了现场应用。应用情况表明,该系统可有效提升装备服役周期管理及技术服务能力,有力支撑企业服务数字化转型。
