关键词: 动车组部件, 弹性订货, 分阶段维护, 两级非完美维护, 联合优化

Abstract: To discuss the joint optimization of preventive maintenance policy,spare parts ordering and inventory policies for Electric Multiple Unit (EMU) components,aiming at the particularity of spare parts consumption process under bi-level imperfect preventive maintenance,the flexible ordering policy with variable order quantity was proposed.The joint optimization model oriented to multi-phase preventive maintenance and spare parts flexible ordering was established.The numerical analysis demonstrated that the flexible ordering policy could meet preventive maintenance needs with lower spare parts inventory;multi-phase preventive maintenance could be adapted to changes in maintenance efforts of two kinds maintenance actions to achieve optimal preventive maintenance.The joint optimization of multi-phases preventive maintenance and flexible ordering policy could minimize total costs,which supported EMU maintenance decision process.

Key words: electric multiple unit's component, flexible ordering, multi-phases preventive maintenance, bi-level imperfect preventive maintenance, joint optimization