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

摘要： 为减轻涡轮盘质量，满足发动机更高推质比的需求，通过ANSYS有限元方法对高负荷弧形轮毂涡轮盘进行了优化分析。从质量和应力两方面对k从0～0.26(k为弧线内凹深度H与轮毂宽度W之比)的涡轮盘进行对比分析。结果表明:(1)随着k的增大，应力分布更均匀且最大周向应力先减小后增大(k=0.12为拐点)，平均径向应力和质量减小，但最大径向应力小幅度增大，Von-Mises等效应力因轴向应力的影响有小幅度增大。(2)研究范围内，k=0.12的涡轮盘最优，与传统涡轮盘(k=0)相比，最大周向应力减小11.13%，最大径向应力和Von-Mises应力虽分别小幅增大1.87%和6.49%，但涡轮盘减质3.10%，安全系数均满足要求，提高了材料的利用率与发动机性能。

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