Application of Sub-Model Technology in Reliability Analysis of Aero-Engine Turbine Disks_Vol. 4 No. 3 (JIEM 2026)_Journal of Industry and Engineering Management (ISSN: 2959-0612)

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Application of Sub-Model Technology in Reliability Analysis of Aero-Engine Turbine Disks

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DOI: https://doi.org/10.62517/jiem.202603309

Author(s)

Qiao Wenkang

Affiliation(s)

Jilin Business and Technology College, Jilin, China

Abstract

Aero-engine turbine disks are subjected to high-speed centrifugal loads, non-uniform temperature fields, and start-stop cycles. High stress gradients and localized plasticity easily form in the tenon, hole edges, and hub transition areas. Full-disk fine-scale finite element analysis (FEM) is costly due to contact nonlinearity and probabilistic sampling. Finite element sub-models, on the other hand, achieve scale separation through a process of "global solution-local truncation-boundary field interpolation-fine-scale solution." This paper reviews the basic principles, local modeling objects of turbine disks, reliability coupling process, typical failure modes, and methodological differences. Research shows that sub-models can reduce the cost of local analysis, but their reliability depends on the cut boundaries, global model accuracy, field variable transfer, and local nonlinearity handling. Future development should focus on multi-field bidirectional coupling, adaptive error control, fusion of manufacturing and measured data, and intelligent physical information models oriented towards multiple failure modes.

Keywords

Aero-Engine; Turbine Disk; Finite Element Sub-Model; Fatigue Reliability; Uncertainty Quantification

References

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