Wheel disc low-cycle fatigue test load coefficient determination method and device and application

By constructing the equivalent stress and lifetime analysis model of the roulette material, the problem of failure to effectively consider valley stress and temperature changes in the prior art is solved, and the reasonable determination of the load coefficient of the low-period fatigue test of the roulette is achieved to ensure the safety of the roulette design and use.

CN120509256APending Publication Date: 2025-08-19AECC SICHUAN GAS TURBINE RES INST
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Patent Information

Application Number
CN202510669684.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-22
Publication Date
2025-08-19

AI Technical Summary

Technical Problem

The prior art fails to effectively consider the impact of valley stress and temperature changes when determining the low-period fatigue test load coefficient of the roulette wheel, resulting in the deviation of the roulette life prediction and poses safety risks.

Method used

Through finite element analysis and material fatigue performance data, an equivalent stress and life analysis model of roulette materials was constructed, and the stress ratio and temperature changes were comprehensively considered, and the load coefficient was corrected to reflect the fatigue damage in the engine state.

Benefits of technology

The reasonable determination of the load coefficient of the low-cycle fatigue test of the roulette is achieved, which reduces safety risks, makes the design and use of the roulette safer and more reliable, and ensures that the fatigue damage in the engine state is truly reflected in the test state.

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Abstract

The invention relates to the technical field of aero-engines, and discloses a wheel disc low-cycle fatigue test load coefficient determination method, a wheel disc low-cycle fatigue test load coefficient determination device and application of the wheel disc low-cycle fatigue test load coefficient determination method. Based on stress characteristics and temperature characteristics of key parts of a wheel disc in an engine state, reasonable determination of a low-cycle fatigue test load coefficient of the wheel disc and conversion of the fatigue life of the wheel disc are realized by comprehensively considering the influence of a peak-valley value stress ratio of the wheel disc in a working state on the fatigue life of the wheel disc and a change rule of material performance along with temperature. The safety risk caused by the fact that the load coefficient deviates from the reality is reduced, and the design and use of the wheel disc are safer and more reliable; by correcting the load coefficient, the fatigue damage of the engine in the test state can be truly reflected, so that the safe life of the wheel disc is effectively determined, and support is provided for the life management of the wheel disc.
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