| Citation: | ZHOU T Y,HU L,ZHAO S,et al. Prediction of aeroengine rotor unbalance considering multi-source errors in assembly process[J]. Journal of Beijing University of Aeronautics and Astronautics,2025,51(9):3001-3010 (in Chinese) doi: 10.13700/j.bh.1001-5965.2023.0438 |
To address the difficulty in predicting the unbalance of aeroengine rotors assembled by complex assembly system, this paper proposed a numerical simulation method for unbalance considering multi-source errors, aiming to achieve the reliable traceability design of the accuracy of workpiece group and its assembly system. Firstly, the transmission principle among process parameters, multi-source errors, relative pose, and unbalance during the rotor assembly process was clarified. Quantitative characterization models were established for typical rotor part manufacturing errors, flange and spigot pose measurement errors, and multi-degree-of-freedom installation mechanism motion errors. Then, a Monte Carlo simulation algorithm for rotor unbalance was designed based on the above models. It realized unbalance prediction under different assembly conditions. For the analysis case of a low-pressure turbine rotor simulator, the accuracy of its assembly system was optimized inversely through comprehensive sensitivity analysis. The qualified rate of corresponding simulated unbalance reaches 99.8%. The proposed simulation method provides reliable accuracy design reference. Finally, assembly verification experiments were carried out. The results show that the deviation rates between the averages of the experimental unbalance and the predicted unbalance are all less than 10%. Thus, the proposed prediction method has high accuracy.
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