可靠度约束下的不完全预防更换维修模型

doi:10.19912/j.0254-0096.tynxb.2020-1372

摘要/Abstract

摘要： 针对可修系统因维修更换计划不合理而导致的不能充分利用设备剩余寿命问题,在综合考虑动态维修成本和可靠度的基础上,提出一种可靠度约束下的不完全预防更换维修方法,建立基于混合故障率的非等周期不完全预防维修模型。以可靠度为约束,给出设备更换维修周期的计算公式,采用枚举法给出最优更换阈值;以平均维修成本最小为目标,给出最佳预修次数、预修周期和更换周期。以某风力机的发电机为例,将该模型与无可靠度约束模型和未考虑更换阈值模型进行对比分析,结果表明所提方法在保证设备可靠运行的同时,有效降低了维修成本。

关键词: 可靠度, 风电机组, 预防性维修, 更换周期, 混合故障率

Abstract: Aiming at insufficient using the remaining life of the equipment used insufficiently in repairable systems due to unreasonable maintenance and replacement plans, on the basis of comprehensive consideration of dynamic maintenance costs and reliability, an incomplete preventive replacement maintenance method under reliability constraints is proposed. A non-equal cycle imperfect preventive maintenance （PM） model based on mixed failure rate is developed as well. Furthermore, the calculation formula of the equipment replacement maintenance period is given on basis of the constraint of reliability, while the optimal replacement threshold is raised by enumeration method. Moreover, with the minimum average maintenance cost as the goal, the optimal number of PM, PM period and replacement cycle are provided. In addition, taking the generator of a wind turbine as an example, the model is compared with PM model without reliability constraints and the model without replacement threshold. The results indicate that proposed methodology effectively reduces maintenance costs and guarantees the reliable operation of the equipment.

Key words: reliability, wind turbines, preventive maintenance, replacement cycle, hybrid hazard rate

中图分类号:

TH17

李建华, 徐家生, 任丽娜. 可靠度约束下的不完全预防更换维修模型[J]. 太阳能学报, 2022, 43(4): 446-452.

Li Jianhua, Xu Jiasheng, Ren Li’na. IMPERFECT PREVENTIVE REPLACEMENT MAINTENANCE MODEL UNDER RELIABILITY CONSTRAINTS[J]. Acta Energiae Solaris Sinica, 2022, 43(4): 446-452.

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