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Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (21): 629385.doi: 10.7527/S1000-6893.2023.29385

• Special Topic: Aero-engine Digital Twin • Previous Articles    

Maintenance-oriented approach for HPT blade life digital twin modeling

Chunhua LI, Jianzhong SUN(), Jilong LU   

  1. College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106
  • Received:2023-07-29 Revised:2023-08-31 Accepted:2023-10-09 Online:2023-11-09 Published:2023-11-07
  • Contact: Jianzhong SUN E-mail:sunjianzhong@nuaa.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52072176)

Abstract:

High-Pressure Turbine (HPT) blade is a typical hot-end component with high temperature, high load and complex structure. Its in-service life depends not only on the level of design, manufacture and process, but also on the actual operating environment, operating conditions and maintenance of the engine. Therefore, how to fuse multi-modal operation and maintenance data to improve the prediction accuracy of HPT blade in-service life and reduce the prediction uncertainty is an important issue. Based on the Usage-Based Life (UBL) method and digital twin technology, this paper proposes a Life Digital Twin (LDT) modeling method for in-service HPT blades driven by data and model fusion. Based on multi-modal operation and maintenance data, the life consumption of HPT blades under actual service conditions can be characterized and tracked, and the in-service lifetime can be predicted under specific operating condition. In addition, the approach of uncertainty quantification and management involved in LDT is also proposed. The approach proposed has been verified on an HPT blade. The results show that the LDT and uncertainty quantification and management approach proposed can effectively fuse multi-modal operation and maintenance data, reduce the prediction uncertainty of HPT blade’s in-service load and life, as well as improve the fidelity of HPT blade life digital twin model; therefore, provides a basic approach support for single engine life management and intelligent operation and maintenance based on digital twin.

Key words: life digital twin, uncertainty quantification and management, in-service HPT blade, operation and maintenance, information fusion

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