Life Assessment of High Pressure Turbine Blade based on Thermal-Fluid-Solid Coupling Simulation
To solve the remaining life assessment problem of engine hot end components,a joint predic-tion model based on finite element and neural network was proposed taking the first stage blade of high-pressure turbine as the research object.Firstly,the thermal-fluid-solid coupling simulation technology was applied to provide initial data and assessment parts for the life theory model;then,combining engi-neering application experience with the time-life fraction method,the remaining life evaluation index was determined considering the interaction of fatigue and creep;finally,in order to improve the rapidity and economy of life prediction,a blade life prediction model was established and trained based on finite ele-ment simulation data and neural network algorithms.The validation results of actual data indicate that the predicted results of the model are close to the remaining life evaluation index provided by foreign commer-cial software;the relative errors of the equivalent operating time of the first stage stationary blade and the first stage rotor blade are within 1%and 3%,respectively.
life predictionfinite element simulationthermal-fluid-solid couplinginteraction of fatigue and creep
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