Arc-shaped tenon blade bird impact resistance analysis method

By simulating bird impacts on the arc tenon blade using the finite element analysis software LS-DYNA, the energy per unit displacement at the blade tip was calculated, and the tenon curvature design was optimized. This solved the problem of assessing the bird impact resistance of the arc tenon blade, and improved design efficiency and safety.

CN118211445BActive Publication Date: 2025-10-17NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202410260265.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-07
Publication Date
2025-10-17
Estimated Expiration
2044-03-07

AI Technical Summary

Technical Problem

Existing technologies make it difficult to assess the bird strike resistance of the arc tenon blades in the early stages of design, making the engine vulnerable to damage from bird strikes, and there is a lack of efficient simulation analysis methods.

Method used

A finite element model of a circular arc tenon blade was established using the finite element analysis software LS-DYNA. By simulating bird impact, the energy required per unit displacement of the blade tip was calculated, the bird impact resistance of the blade under different curvatures was compared, and the tenon design was optimized.

Benefits of technology

By using computer simulation analysis, the design of the tenon curvature is optimized, the blade's resistance to bird strikes is improved, the cost of physical testing is reduced, and the design efficiency is increased.

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Abstract

The application provides a circular-arc tenon blade bird impact resistance analysis method, and relates to the field of bird impact resistance design of a circular-arc tenon blade of an aero-engine. The method comprises the following steps: establishing and verifying a bird impact simulation analysis model of the circular-arc tenon blade, performing bird impact calculation on the blades with different tenon radii in a design range, obtaining total energy of the blades in the process of being impacted by birds and blade tip displacement, processing the data into energy required by blade tip unit displacement for comparison, and obtaining the tenon radius with the strongest bird impact resistance in the range. The application can analyze the influence of the tenon radius on the bird impact resistance of the blade and is helpful for the selection of the radius.
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