Journal
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
Volume 64, Issue 6, Pages 4147-4159Publisher
SPRINGER
DOI: 10.1007/s00158-021-03040-9
Keywords
Engine bracket; BESO; Topology optimization; Stress constraint
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Funding
- National Key RD Project [2020YFB1709401]
- National Natural Science Foundation of China [11972166]
- Natural Science Foundation for Distinguished Young Scholars of Hubei province of China [2020CFA080]
- Fundamental Research Funds for the Central Universities [2019kfyXKJC044]
- Aeronautics Power Foundation [6141B090564]
- Natural Science Foundation of Shaanxi Province of China [2021JM-043]
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This work improves a previous stress-constrained topology optimization method and applies it to a typical aircraft engine bracket design problem. The improved method uses a more efficient and versatile self-adaptive scheme for determining the Lagrange multiplier, resulting in a bracket design that outperforms the original in terms of weight, stiffness, and strength.
This work improves our previous stress-constrained topology optimization method (Fan et al., in Struct Multidisc Optim 59:647-658, 2019) and provides an application of the improved method to a typical aircraft engine bracket design problem. The original method was built upon the bi-directional evolutionary structural optimization (BESO) method with an extension to account for stress constraints. In this work, we first improve the method by means of a more efficient and versatile self-adaptive scheme for the determination of the Lagrange multiplier. The improved method is then applied for the design of a typical aircraft engine bracket considering multiple practical load conditions. The resulting bracket topology from stress-constrained design is further smoothed and detailed using basic CAD (Computer-Aided Design) primitives. Numerical results show that the reconstructed bracket design evidently outperforms than the original bracket design in terms of weight, stiffness, and strength.
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