Resilience improvement of a critical infrastructure via optimal replacement and reordering of critical components
Resilience improvement of a critical infrastructure via optimal replacement and reordering of critical components
复制标题
DOI：
10.1080/23789689.2019.1710072
复制
发表时间：
2020-02
影响因子：
5.9
通讯作者：
Hongwei Luo;Basem A. Alkhaleel;H. Liao;R. Pascual
中科院分区：
文献类型：
--
作者：
Hongwei Luo;Basem A. Alkhaleel;H. Liao;R. Pascual
提高关键基础设施的弹性的最重要的障碍之一是关键部件的及时更换。然而，备件短缺往往使从业人员无法实现这一目标。此外，备件可能在货架上变质是常见的。本文研究了带有一个退化部件的单部件退化系统。故障切换和预防切换策略被认为是在每个操作周期的组件更换，以尽量减少长期运行的成本率。以某海上风电场齿轮箱更换为例，说明了联合部件更换和重新排序策略在提高关键基础设施弹性方面的应用。虽然预防性切换策略可以降低系统发生故障的几率，但由于备件在货架上的劣化和可回收性，故障切换策略仍然可以产生更好的经济性能。缩略语：CDF：累积分布函数; PDF：概率密度函数; PR：预防性置换; CE：累积暴露
ABSTRACT One of the most important obstacles in improving the resilience of critical infrastructures is the timely replacement of critical components. However, the shortage of spare parts often keeps practitioners from achieving this goal. Moreover, it is common that spare parts may deteriorate on the shelf. In this paper, we focus on a one-component deteriorating system carrying one deteriorating spare part. Both failure-switching and preventive-switching strategies are considered for component replacement during each operating cycle to minimize the long-run cost rates. A case study on gearbox replacements for an offshore wind farm is provided to illustrate the proposed joint component replacement and reordering policies in improving the resilience of critical infrastructures. Although the chance of failure of such a system may be reduced by the preventive-switching strategy, the failure-switching strategy may still result in better economic performance due to the on-shelf deterioration and salvage of spare parts. Abbreviations: CDF: cumulativedistributionfunction; PDF: probabilitydensityfunction; PR: preventivereplacement; CE: cumulativeexposure