Method of structural optimization design for turbine disk/tenon

Considering the effect between tenon joints and meridional section of disk in structure design,a general method of structural optimization design for turbine disk/tenon was presented,including designing tenon joints/meridional section of disk in stages and synthetically optimizing with coordination.Based on ANSYS platform and parametric modeling technique,optimization design variables were chosen and a mathematic model of structural optimization design for turbine disk/tenon was established for the purpose of getting minimum masses with all constrained stresses of turbine disk and tenon joints being met.The results of the structural optimization designs of turbine disk and tenon joints for an aero-engine show that the mass of two-tooth and three-tooth disk/tenon are both decreased obviously after optimization under the condition of meeting geometry and strength requirements,which verifies the rationality of the method;the results also reveal that the structure of two-tooth disk/tenon is less mass and the maximum first principle stress lower than that of three-tooth disk/tenon.This method and platform of structural optimization design for turbine disk/tenon with any number of teeth were applied to structure designs of different turbines,which demonstrated a high engineering application.