有限维修能力下作战单元时变可用度评估模型

针对作战单元任务期内备件需求随任务阶段动态变化的现实情况，考虑作战单元因携行维修能力有限而导致可修件具有一定报废概率的影响，通过引入报废因子，建立两级保障体制下，故障件具有一定报废概率且不考虑外部补给的作战单元时变可用度评估模型。采用ExtendSim仿真软件进行计算，根据仿真值进行参数拟合得到模型中报废因子的近似解析表达形式。研究表明，报废因子能够适应不同的可靠性维修性参数值，模型具有较强的适应性。该模型有效解决了备件非平衡状态下的装备时变可用度评估问题，可为装备管理人员制定合理的保障方案提供支撑。
Aimed at the demand of spare parts changes dynamically as the mission phases change, and considering the influence of the scrap probability owing to the finite carrying repair capacity of combat units, by the introduction of the scrap factor, the evaluation model of time-varying operation availability for two echelon support system was developed, in which, the failure parts can be scrapped and there is no exterior supply. And then, a simulation is realized based on the ExtendSim software and the availability results was received. According to the results, the parameter fitting was carried into execution and the approximate analytical formula of scrap factor in the availability model was obtained. In a given example, the scrap factor can adapt to different reliability and maintainability parameters, and the adaptability is validated. The evaluation model is a complementary for conventional models which is developed based on the spare parts balance in support system and can help equipment personals to make appropriate spare parts programs. 