一种基于可靠度约束的分阶段等周期预防性维修模型研究

为保持装备寿命周期的运行可靠性,针对周期预防性维修模型和顺序预防性维修模型的优缺点,结合装备维护保养实际,提出3阶段等周期预防性维修模型。以可靠度约束条件下的装备寿命周期最小费率为优化目标,建立了周期预防性维修模型、顺序预防性维修模型和3阶段等周期预防性维修模型,从而得到各计算模型装备寿命周期的最优预防性维修次数和维修间隔期。结果表明,在同等条件下,3阶段等周期预防性维修模型既能保持装备寿命周期内较高的可靠性和较低的费率,又能紧密结合维修操作实际,具有良好的应用可行性和推广性。

Research on a Phased Periodic Preventive Maintenance Model Based on Reliability Constraint

In order to maintain the operational reliability of equipment during life cycle,the advantages and disadvantages of the periodic preventive maintenance model and the sequential preventive maintenance model are analyzed.A three-stage periodic preventive maintenance model is proposed based on the equipment maintenance practices.Three models,i.e.,periodic preventive maintenance model,sequential preventive maintenance model and three-stage periodic preventive maintenance model,are constructed by taking the minimum cost rate of equipment life cycle under the reliability constraints as the optimization objective.The optimal preventive maintenance frequencies and intervals of equipment life cycle of each model are obtained.The case study results show that,under the same conditions,a high reliability and a low cost rate of equipment during life cycle can be obtained by using the three-stage periodic maintenance model.Moreover,it can also closely integrate the maintenance operation practices,as well as has a good feasibility and generalizability.