【作者】 舒国云；

【导师】 朱复谦； 黄大明；

【作者基本信息】 广西大学 ， 农业机械化工程， 2005， 硕士

【摘要】 随着网络经济的形成,企业之间的竞争加剧,许多企业开始重视维护管理的研究与实施情况,以提高整个企业的生产效率,到达提升市场竞争力的目的。本文在分析工程机械维护必要性的基础上,探讨了周期性的维护对工程机械性能的影响,研究了维护中故障率的动态变化规律,并基于这种变化的故障率研究了工程机械在单目标意义以及多目标意义下的维护周期优化理论与方法。 论文首先论述了国内外工程机械维护周期优化的研究现状,提出了对工程机械维护周期进行优化的必要性。通过系统分析目前我国工程机械维护现状、维护保养制度,以及工程机械故障过程与故障规律,探讨了工程机械维护中存在的主要问题,并结合国内外研究现状,利用最小二乘法分析工程机械故障历史数据,拟合工程机械故障规律的最优分布。 通过分析五种不同的维护类型对工程机械性能恢复程度影响的不同,引入了变故障率的概念,并用役龄回退因子表示周期性维护的维护效果,分析了故障率在工程机械维护与运行过程中的动态变化规律。建立了基于维护周期的安全服务水平模型,探讨了安全服务水平与维护周期的关系,以及变故障率下的不同维护周期间的关系与变化规律;建立了变故障率的有效度模型,分析了在最大有效度原则下的维护周期,不同维护周期之间的规律与变化趋势,以及累计有效度;建立了单位时间成本模型,分析了单位时间成本与维护周期之间关系,得出了最小单位时间成本的最佳维护周期,以及不同维护周期之间关系。 在单目标维护周期模型的基础上,运用多目标规划方法,建立了同时考虑安全服务水平、有效度与成本的三个目标意义下的多目标工程机械维更多还原

【Abstract】 With the development of the network economy, the competition among enterprises becomes more violent, in order to improve productivity and market competition of the whole enterprise, more and more enterprises start realizing the importance of research and implement of maintenance management. By analyzing the necessity of maintenance of construction machinery, this paper discusses the periodic maintenance affecting the performance of the construction machinery and investigates the dynamic rule of failure rate in the maintenance. Based on this dynamic failure rate, this paper studies the optimization theory and method of maintenance period under single objective and multi-objectives.At first, this thesis discusses the present situation of optimization of maintenance period of construction machinery in domestic and foreign country, and puts forward the necessity of maintenance optimization. After systematical analysis of the present situation of maintenance management of construction machinery of our country, system of maintenance management, the process of failure and the rule of failure, proposes the main problems existing in the maintenance management of the construction machinery. Combining the domestic and foreign present research situation, adopts least square method to analyze historical failure data of construction machinery, and to fit the failure rule of the best distribution of construction machinery.By analyzing the effects of five different types of maintenance operation, this thesis proposes the conception of metabolic failure rate, and introduces age reduction factor to represent the effect of periodic maintenance, and analyzes thedynamic rule of failure rate of construction machinery changing in the process of maintenance and operation. Through establishing the maintenance model based on safety service level, discusses the connection between safety service level and maintenance period and the changeable rule of different maintenance period under dynamic failure rate. On the basis of the availability model of dynamic failure rate, analyzes the maintenance period in the principle of maximum availability, the rule, the changeable trend of different maintenance period and the cumulate availability. Based on the cost model of unite time, investigates the connection between unit time and maintenance period, and educes the best maintenance period of minimum unit time and the connection between different maintenance period.Based on the single-objective maintenance period model, establishes a multi-objective maintenance period mathematics model synchronously considering the factor of safety service level, availability and cost. Analyzing the optimization method seeking multi-objective problem, adopts a multi-objective genetic algorithm and program to seek the outcome and obtain the best multi-objective outcome of maintenance of construction machinery.更多还原