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摘要:
针对先进航空发动机转子数字装配和不平衡分布控制问题，提出了转子不平衡分布数字孪生模型的建模方法。开展了构件装配参数对转子不平衡分布状态影响的敏感度评估，判定出大质量构件的静不平衡和位于转子中部构件端面跳动是影响转子不平衡分布优劣的关键因素。基于数据融合方法，结合某大涵道比发动机核心机转子多台次装配统计数据，成功识别并修正了该转子不平衡分布数字孪生模型中关键参数的阈值，为进一步开展转子结构状态控制和动力响应预测提供了模型基础。
Abstract:In response to the intricate challenges of digital assembly and unbalanced distribution control for advanced aero-engine rotors, this paper proposes a digital twin model to characterize the rotor’s unbalanced distribution. After a thorough sensitivity analysis of the assembly parameters, it was determined that the run-out of the end-face of the intermediate components and the static unbalance of the heavy mass components were the main factors influencing the rotor’s unbalanced distribution. The study effectively identified and adjusted the parameter thresholds in the digital twin model by using a data fusion technique using the collected assembly statistics data from many high-pressure rotors. This correction provides a robust model foundation for further initiatives in rotor dynamic response prediction and control.
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Key words:
- rotor assembly /
- unbalance distribution /
- digital twin /
- data fusion /
- aero-engine
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图 2 构件堆叠过程相对位置关系示意图
Figure 2. Schematic diagram of relative position relationship during component stacking process
图 3 某大涵道比发动机核心机转子构件组成
P1—1-2级盘；P2—3级盘轴；P3—4-9级盘；P4—篦齿盘；P5—鼓筒轴；P6—封严盘；P7—涡轮盘；P8—后轴。
Figure 3. Composition of rotor components of a large bypass ratio core engine
图 8 转子构件旋转惯性载荷在转子内的分布
Figure 8. Distribution of rotational inertia load of components within rotor
图 9 针对特定输入/输出参数的样本分布
Figure 9. Sample distribution for specific input and output parameters
图 10 转子不平衡分布受构件不平衡影响的敏感度
Figure 10. Sensitivity of rotor unbalance distribution affected by component unbalance
图 11 转子结构状态受构件形位公差影响的敏感度
Figure 11. Sensitivity of rotor structure state affected by component shape and position tolerances
图 12 关键构件不平衡参数统计结果
Figure 12. Statistical results of unbalanced parameters of key components
图 13 关键构件形位公差参数统计结果
Figure 13. Statistical results of geometric tolerance parameters of key components
表 1 关键构件装配参数测量值统计值
Table 1. Statistical measurement values of key component assembly parameters
构件 平均值/(g·mm) 极限值/(g·mm) 最大值/(g·mm) ${\mu _{{\text{un}}}}$/% 静不
平衡1-2级盘 447 895 892 −0.6 4-9级盘 1964 3858 4679 41.8 涡轮盘 231 566 508 −25.3 构件 平均值/mm 极限值/mm 最大值/mm ${\mu _{{\text{un}}}}$/% 端面
跳动鼓筒轴 2.64×10−3 6.00×10−3 7.70×10−3 64.4 封严盘 1.62×10−3 4.53×10−3 8.00×10−3 214.9 
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