针对长期贮存产品的维修保障特点，分别建立两类典型贮存部件的瞬时贮存可用度模型。一类部件为等时定检维修产品，定期检测有一定的概率无法探测到故障，若检测发现故障则立即进行维修，经过一段时间后修复如新；另一类部件为定期更换产品，其更换周期长度为维修类产品定检周期的整数倍。在此基础上，推导由这两类部件串联构成系统的瞬时和平均贮存可用度，并建立该系统贮存剖面内的维护费用模型。以固定贮存期内的费用率最低为目标，对检测周期以及更换周期进行了综合优化。计算结果表明：不同的周期长度配比对于费用率有较大的影响，合理的周期规划是实现贮存经济性的关键。
Abstract
According to the maintenance features of long-term storage products， the transient storage availability models for two typical kinds of components are established, respectively. A kind of component is inspected periodically. A failure may be missed by inspections with a fixed probability, and as soon as the failure is found, the component is repaired to as good as new condition after a period of time. The other kind of component is preventively replaced periodically, and the length of its replacement cycle is an integral multiple of that of the inspection cycle. Subsequently, the transient and average storage availabilities of the system which is composed of these two kinds of components are deduced, and a maintenance cost model for such a storage system is established. The inspection cycle length and replacement cycle length are optimized comprehensively for minimizing the average maintenance cost rate in a fixed storage period. The computed results indicate that the combination of these two variables has a large effect on the cost rate. A conclusion can be drawn that a reasonable schedule of maintenance cycle contributes to the reduction in the maintenance cost for a long-term storage system.
关键词
系统工程方法论 /
贮存可用度 /
费用分析 /
可修系统 /
定期检测 /
定期更换
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Key words
system engineering methodology /
storage availability /
cost analysis /
repairable system /
periodic inspection /
periodic replacement
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基金
国家自然科学基金项目（61104133、61473014）
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脚注
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