Abstract
In the assembly process of aeroengine, the aeroengines have been rejected at pass-off test for high vibration of high-pressure rotor under the condition of meeting the geometric accuracy. Repeated disassembly and trial assembly will lead to interface damage, which will affect the safety and reliability of the engine. Therefore, a multi-objective collaborative optimization process method for geometric accuracy and dynamic performance is put forward based on the practical engineering problems. In the proposed method, the primal problem firstly reveals the transfer mechanism of coaxiality and unbalance of rotor system, and the prediction model of the coaxiality and unbalance of the rotor system was established. Then, combined with the high-precision reduced-order model of aeroengine high-pressure combined rotor, the system vibration responses under different assembly states are obtained. Finally, a multi-objective collaborative optimization assembly process method considering coaxiality, unbalance and vibration response is obtained. The results show that the collaborative optimization process method considering assembly accuracy and dynamic performance is the optimal assembly strategy, which can reduce the vibration amplitude of the key nodes of the rotor system while ensuring high assembly accuracy and achieve the low-level vibration of the rotor system.
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Data Availability
The datasets obtained during the current work are available from the corresponding authors upon request.
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Funding
The work was supported by Foundation of He’nan Educational Committee, China (23B460001), the National Natural Science Foundation of China (51975539) and partly by the Key Science and Technique R&D Program of Henan Province, China (212102210275). The authors also wish to thank them for their financial support.
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All authors contributed to the study conception and design.
Tao Li: established the dynamic model of rotor connection considering assembly error, proposed a multi-objective collaborative optimization model for geometric accuracy and dynamic performance, and drafted the manuscript.
Zhenhua Wen: planned and coordinated the research project and its funding and summarized the current situation and the existing problems about assembly of rotating combined rotor system.
Binbin Zhao: proposed the accuracy prediction model of error and unbalance of typical bolted combined rotor and participated in the verification of accuracy prediction model.
Qingchao Sun: carried out the experimental verification of the theoretical model and analyzed and discussed the experimental results.
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Appendices
Appendix 1
The basic parameters of the simulation high-pressure rotor are shown in Table 8. According to reasonable equivalence, the relevant parameters of the shaft and disk of the high-pressure rotor system are shown in Tables 9 and 10, respectively.
Appendix 2
The runout deviation of the assembly surface of the rotor system is shown in Fig. 10.
Surface runout of mating surfaces for high-pressure rotor
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Li, T., Wen, Z., Zhao, B. et al. A novel collaborative optimization assembly process method for multi-performance of aeroengine rotors. Int J Adv Manuf Technol 125, 1827–1843 (2023). https://doi.org/10.1007/s00170-023-10808-4
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DOI: https://doi.org/10.1007/s00170-023-10808-4