基于主动热载荷管理技术的涡轮盘疲劳寿命

In order to reduce the failure risk of turbine disk and extend its life, actively managed thermal loading method was applied to the turbine disk with pre-set crack. Meanwhile, the crack stress intensity factors were calculated by general weight function method and the life of the turbine disk was analyzed. The influence of the energy distribution based on actively managed thermal loading method on the life of the turbine disk was studied. The relationship and change trend between the thermal boundary loading and the life of the turbine disk were explored. The reason and mechanism were analyzed by finite element numerical simulation. The consequence shows that actively managed thermal loading method can effectively optimize the temperature distribution of the turbine disk, reduce the stress near the crack, delay the expansion of the crack, and significantly improve its life and safety. When the thermal boundary loading coefficient was 0.05 and 0.10 respectively, the corresponding lives increase by 12.2% and 26.1%.