A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum
The load spectrum serves as the foundation for the life analysis of aero-engine turbine disks. To enhance the accuracy of life assessments for turbine disks, this study compiles a time-varying load spectrum for turbine disks. Firstly, a surrogate model for transient processes at the critical points...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-05-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/12/5/423 |
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| author | Shunyu Yao Xuming Niu Zhigang Sun Yingdong Song |
| author_facet | Shunyu Yao Xuming Niu Zhigang Sun Yingdong Song |
| author_sort | Shunyu Yao |
| collection | DOAJ |
| description | The load spectrum serves as the foundation for the life analysis of aero-engine turbine disks. To enhance the accuracy of life assessments for turbine disks, this study compiles a time-varying load spectrum for turbine disks. Firstly, a surrogate model for transient processes at the critical points of turbine disks is established, enabling the rapid evaluation of the transient temperature and thermal stress at these points under complex loading histories. Secondly, a performance degradation model is established based on real engine test data, explicitly describing the general trend of performance degradation characteristics with respect to the cycle number and engine power. Finally, a time-varying load spectrum for turbine disks is compiled, considering both short-term transient processes and long-term performance degradation. The life of turbine disks at the fir-tree slot root and disk bore is assessed using the Manson–Coffin equation, Wilshire equation, and linear damage accumulation rule. The results indicate that neglecting transient processes leads to conservative life assessment results while neglecting performance degradation leads to dangerous life assessment results. Compared with traditional methods, the time-varying load spectrum significantly improves the accuracy and scientific nature of turbine disk life assessment. |
| format | Article |
| id | doaj-art-1f0e34125de34d62864c4eb2b7d5cccc |
| institution | Kabale University |
| issn | 2226-4310 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj-art-1f0e34125de34d62864c4eb2b7d5cccc2025-08-20T03:47:49ZengMDPI AGAerospace2226-43102025-05-0112542310.3390/aerospace12050423A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load SpectrumShunyu Yao0Xuming Niu1Zhigang Sun2Yingdong Song3Key Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaKey Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaKey Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaKey Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaThe load spectrum serves as the foundation for the life analysis of aero-engine turbine disks. To enhance the accuracy of life assessments for turbine disks, this study compiles a time-varying load spectrum for turbine disks. Firstly, a surrogate model for transient processes at the critical points of turbine disks is established, enabling the rapid evaluation of the transient temperature and thermal stress at these points under complex loading histories. Secondly, a performance degradation model is established based on real engine test data, explicitly describing the general trend of performance degradation characteristics with respect to the cycle number and engine power. Finally, a time-varying load spectrum for turbine disks is compiled, considering both short-term transient processes and long-term performance degradation. The life of turbine disks at the fir-tree slot root and disk bore is assessed using the Manson–Coffin equation, Wilshire equation, and linear damage accumulation rule. The results indicate that neglecting transient processes leads to conservative life assessment results while neglecting performance degradation leads to dangerous life assessment results. Compared with traditional methods, the time-varying load spectrum significantly improves the accuracy and scientific nature of turbine disk life assessment.https://www.mdpi.com/2226-4310/12/5/423time-varying load spectrumaero-engine turbine disklife assessmenttransient processperformance degradation |
| spellingShingle | Shunyu Yao Xuming Niu Zhigang Sun Yingdong Song A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum Aerospace time-varying load spectrum aero-engine turbine disk life assessment transient process performance degradation |
| title | A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum |
| title_full | A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum |
| title_fullStr | A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum |
| title_full_unstemmed | A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum |
| title_short | A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum |
| title_sort | method for the life assessment of aero engine turbine disks based on a time varying load spectrum |
| topic | time-varying load spectrum aero-engine turbine disk life assessment transient process performance degradation |
| url | https://www.mdpi.com/2226-4310/12/5/423 |
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