ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Influence of ring gear flexibility on fatigue reliability in large aerospace planetary mechanisms
Received date: 2024-10-30
Revised date: 2024-11-18
Accepted date: 2024-12-27
Online published: 2025-01-10
Supported by
National Natural Science Foundation of China(52005350);The Foundation of Key Laboratory of Rapid Development & Manufacturing Technology for Aircraft （Shenyang Aerospace University）, Ministry of Education(Zong 20240224);Basic Research Project of Higher Education Institutions, Liaoning Provincial Department of Education(LJKZ0196)
The flexibility of the ring gear significantly influences the mechanical properties of planetary transmission at both the tooth meshing level and the system power split level， making it one of the most important design factors determining the service reliability of large aerospace planetary mechanisms. To analyze the way and extent to which the rim flexibility of the ring gear affects the fatigue reliability of the planetary system， a planetary system reliability assessment model is developed using the stress-strength interference theory and the full probability formula calculation. The model incorporates load and strength input variables obtained through the lumped mass finite element method and probabilistic life transformation test of the gear teeth. Finally， the mapping relationship between rim thickness and the reliability index of the planetary system is established， and the thickness range of the ring gear rim with the best reliability gain effect under the mass constraint is accurately determined. This study provides a technical reserve for the fatigue reliability design of large aviation planetary systems.
Ming LI , Xin WAN , Puzheng JI . Influence of ring gear flexibility on fatigue reliability in large aerospace planetary mechanisms[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(14) : 231468 -231468 . DOI: 10.7527/S1000-6893.2024.31468
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