| CHEN Zhi-ying, WANG Chao, ZHOU Ping.Robust Optimization Method for Turbine Blade under Fatigue-Creep Interaction[J].航空发动机,2017,43(4):11-16 |
| Robust Optimization Method for Turbine Blade under Fatigue-Creep Interaction |
| DOI： |
| Key Words:turbine blade fatigue-creep life prediction robust optimization design time-life fraction method aeroengine |
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| Abstract:In order to reflect fatigue-creep interaction of turbine blade clearly, raise the accuracy and reliability of life prediction
result and improve sensitivity of fatigue life to random variables at the same time. low cycle fatigue life and creep life of turbine blade were
calculated by Manson-Coffin formula and Larson-Miller equation, fatigue-creep damage was obtained by modified time-life fraction
method. Robust optimization design of turbine blade fatigue life was developed by combining RSM 渊Response Surface Methodology冤and
FFOA 渊Fruit Fly Optimization Algorithm冤, considering the uncertainty of loads, material parameters and the degree of fatigue-creep
interaction. The results show that probability interval of fatigue-creep life for turbine is decreased by 8.48%, which verify the feasibility of
this optimization method. |
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