关键词: 弧形轮毂涡轮盘；轮毂内凹深度；有限元方法；结构优化；减质；安全系数

Abstract: In order to lighten weight of turbine disk and satisfy the need of higher?engine thrust-mass ratio，the optimization analysis of the heavy duty contoured bore turbine disk was conducted with the finite element method of ANSYS. The contoured bore turbine disks with different k(0≤k≤0.26)，the ratio of the contoured depth H to the disk bore width W，were analyzed and compared in terms of mass and stress. It is found that ，with the increase of k，the stress becomes more uniform and the maximum circumferential stress decreases and then increases (k=0.12 is the turning point)，the average radial stress and mass reduce，but the maximum radial stress increases slightly，the Von Mises equivalent stress also increases a little due to the influence of the axial stress. The disk with ratio k=0.12 was the optimal turbine disk，compard to the conventional disk(k=0)，the maximum circumferential stress greatly decreases by 11.13%，though the maximum radial stress and Von Mises equivalent stress slightly increase by 1.87% and 6.49% respectively，the mass decreases by 3.10%，and the safety factor meet the strength design requirements，which improves the utilization of the material and the performance of the engine effectively.

Key words: Contoured bore turbine disk；Contoured depth；Finite element method；Structure optimization；Mass decrease；Safety factor