Structural optimization design method of twin-web turbine disk with tenon

A 3-D structural optimization design method for twin-web turbine disk with tenon was presented, covering strategies of partial speedy optimization/totality-subtle optimization for disk and tenon structure with total mass of disk with tenon as the objective function and the partial management of design parameters. The structural optimization design platform for twin-web turbine disk with tenon was established based on software of ANSYS. Two models of twin-web turbine disk with tenon were designed for a high-pressure turbine rotor. And the influence of basic parameters, such as radius of disk outside edge neck, thickness of disk outside edge, on the stresses of several critical points of disk with tenon was studied. According to the optimization results, the method presented is proved feasible, as the distribution of stress in twin-web turbine disks is more uniform than that in single-web turbine disk; the masses of two models of twin-web turbine disk are 19.90% and 17.35% lighter than that of the single-web turbine disk model under the condition of meeting structure strength criterions, while the calculational time for optimizing the twin-web turbine disk with tenon model by the method presented is just 1/3 of that by the conventional 3-D optimization method. It is demonstrated that the method presented is reasonable and highly efficient.