飞机复材薄壁结构件具有刚性弱、制造偏差大等特点,在装配时易产生几何超差、装配内应力过大与装配损伤等现象。现有装配模式多考虑几何精度上的达成,对于零组件间的装配内应力与损伤分布结果较少关注,不确定性极强的装配物理性能偏差打包至服役环节将直接影响结构稳定性。首先,介绍装配几何超差的种类与特点、装配内应力的产生及装配损伤的形成机理,提出装配体几何-物理-服役装配性能的关联模型,展示装配几何与物理性能对飞机服役性能的双向作用关系;其次,分析初始装配几何超差、内应力与损伤状态在服役过程中的动态变化,以及对飞机结构强度与疲劳寿命等力学性能的影响,为装配工艺环节与服役性能指标间的关联分析提供基础理论指导;最后,解析装配几何与物理性能建模、装配服役性能预测、装配性能与服役性能虚拟仿真试验、面向服役性能保障的装配工艺参数反求等关键技术,并针对如何构建面向服役性能保障的装配工艺模式转型进行了展望。
Due to the weak rigidity and large manufacturing deviations of thin-walled composite structural components, geometric deviations, excessive internal stresses, and assembly damage are prone to occur during assembly. The current assembly modes mostly consider the satisfaction of geometric accuracy, and pay less attention to the distribution of internal stresses and damages between components. The highly uncertain assembly stresses and damages packaged into service will affect structural stability directly. Firstly, the types and characteristics of assembly geometry deviations, the generation of internal stresses in assembly, and the formation mechanism of assembly damage were analyzed. Then a correlation model between assembly geometry physics service assembly performance was proposed, and it demonstrated the bidirectional relationship between assembly geometry and physical performance on service performance. Secondly, the dynamic changes of initial assembly geometry deviation, internal stress, and damage state during service, as well as their impact on mechanical properties such as aircraft structural strength and fatigue life were analyzed, and basic theoretical guidance for the correlation analysis between assembly process and service performance indicators would be provided. Finally, key technologies such as assembly geometry and physical performance modeling, assembly service performance prediction, virtual simulation testing of assembly performance and service performance, and reverse engineering of assembly process parameters for service performance assurance were analyzed. And how to construct an assembly process model transformation for service performance assurance was discussed.