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A Study on the Imperfect Preventive Maintenance Policy for Repairable System

Author: YangZhiXiu
Tutor: SongZhiJie
School: Yanshan University
Course: Management Science and Engineering
Keywords: preventive maintenance optimization model dynamic preventive maintenancecost age reduction factor availability reliability
CLC: TH17
Type: Master's thesis
Year: 2013
Downloads: 5
Quote: 0
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Abstract


In order to reduce the workload of enterprises repairing the equipment, reduce thecosts of the equipment maintenance and develop an equipment maintenance program that is morepracticality. For repairable systems, a single objective preventive maintenance decision-makingmodel that constructed by availability constraint and a multi-objective preventivemaintenance optimization model were established to research the periodic imperfect preventivemaintenance methods of the enterprises equipment. The methods of enumeration and minimumand maximum were carried out to analyze the optimal result so that ensure the availabilityand reliability of the equipment. At the same time, the maintenance costs could bereduced.This paper studied the equipment imperfect preventive maintenance strategy basedon the theory of modern maintenance management. Firstly, the research background andmeaning were introduced. And the development of the preventive maintenance ofdomestic and abroad was analyzed. On this basis, the main content of this paper wasintroduced.Then, a dynamic preventive maintenance cost model was established, and byintroducing the concept of age reduction factor, the effective age of the equipment couldbe deduced. Then the times of the breakdowns during the interval of preventivemaintenance could be obtained. In this case, the expressions of the equipmentmaintenance costs and maintenance time during the operation could be gotten.And then, a single-objective preventive maintenance decision-making model thatconstructed by availability constraint was built. By using the enumeration method, theoptimal imperfect preventive maintenance cycle and maintenance times was obtained.Furthermore, taking into account the equipment availability and reliability, amulti-objective preventive maintenance optimization model were established. Andoptimization analysis was carried out to get the optimal preventive maintenance cycle.Finally, through collecting the equipment failure history data of the coal port of QinHuangdao, the preventive maintenance optimal models established in this paper wereverified. And the various parameters of the model were analyzed by sensitivity analysis method to identify the key factors impacting the optimal maintenance strategy, and drawthe relevant conclusions.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical operation and maintenance
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