后勤装备领域开展RCMA的需求分析及方法

近年来,后勤装备建设实现了现代化、信息化快速发展,为提高部队作战能力发挥了重要的保障作用。但是,后勤装备也存在诸如自身维修保障能力不足等亟待解决的现实问题,其中,缺乏科学合理的以可靠性为中心的维修分析(RCMA)支撑便是造成这个问题的重要原因之一。鉴于此,在认真分析后勤装备特点基础上,详细剖析后勤装备领域开展RCMA的迫切需求,提出开展后勤装备RCMA的方法。

Establishing simulation model for optimizing efficiency of CNC machine using reliability-centered maintenance approach

The objective of this work was to enhance the product’s quality by concentrating on the machine’s optimized efficiency.In order to increase the machine’s reliability,the basis of reliability-centered maintenance approach was utilized.The purpose was to establish a planned preventive maintenance strategy to identify the machine’s critical components having a noteworthy effect on the product’s quality.The critical components were prioritized using failure mode and effect analysis(FMEA).The goal of the study was to decrease the ppm time interval for a CNC machine by simulating the projected preventive maintenance time interval.For this purpose,the simulation software ProModel 7.5 was implemented for the current preventive maintenance procedure to choose the best ppm time interval which contributed better norms.Five dissimilar optimization approaches were applied,however,the first approach yielded the prominent total system cost and the shorter ppm interval.The results of the study revealed that there was an increase of USD 1878 as a result of an increase in total system cost from USD 78,365 to USD 80,243.Preventive maintenance costs were reduced from USD 4196 to USD 2248(46%).The costs associated with good parts increased from USD 8259 to USD 8294(0.4%)and the costs associated with defective parts reduced from USD 171 to USD 3(98.25%),respectively.

高温气冷堆主氦风机预防性维修策略研究

高温气冷堆主氦风机是清华大学自主研发的先进核能核心装备之一,对于反应堆的正常运行至关重要。主氦风机停机会导致反应堆紧急停堆,直接影响核电厂的运行,并可能带来安全风险。因此,需要评估主氦风机的可靠性,并对主氦风机开展预防性维修策略研究,以保障高温气冷堆核电厂高质量运行。首先,该文使用故障模式、影响和危害性分析(failure mode, effects and criticality analysis, FMECA)方法识别主氦风机的关键重要部件;然后,基于各部件的通用数据评估得出主氦风机的故障率及各部件故障率占比,为提高主氦风机的运行可靠性提供参考依据;最后,使用以可靠性为中心的维修分析(reliability centered maintenance analysis, RCMA)对主氦风机的预防性维修策略进行规划,提出预防性维修方案建议。该文研究成果可为新研核能设备提升设计质量提供参考,为其他相关核能设施开展可靠性和维修性研究提供借鉴。