中文摘要：

为了探讨部件间的相关性对系统维护计划的影响,基于复杂机械系统中部件间的相关性理论,利用故障链对部件间的复杂故障相关关系进行描述.根据部件在故障链中所处的层次对部件进行编号,建立了复杂机械系统中各部件的可靠度模型.通过将各部件的维护成本划分为固定成本和变动成本对经济相关性进行建模,以维护时间和维护成本为优化目标对系统各部件实施不定周期的成组维护策略.应用遗传算法对维护计划进行优化决策,结果表明,该方法的维护方案合理.通过对最低可靠度和故障相关系数的敏感性分析,得出应着重对可靠度衰退速率较大部件的最低可靠度进行合理设置并加强部件间的柔性连接的结论.

英文摘要：

In order to explore the effects of dependence among components on the maintenance plan of the system,based on the theory of correlation among components and relationship between components described in failure chains,components were numbered according to the failure level in the chains.Besides,the reliability model of each component in complex mechanical system was established.By dividing the maintenance costs of the components into fixed and variable costs,the economic relevance model was completed,the maintenance cost and maintenance time was treated as the optimal goals,and the group maintenance strategy was implemented with indefinite period for various components in the system.The application of genetic algorithms to optimize maintenance plan and the computational experiments demonstrate that the proposed model can get a proper maintenance schedule.The analysis of key sensitive parameters indicates that in setting reasonable lowest reliability,components with larger deterioration rate should be focused on and the flexible connection between components should be strengthened.