In order to design the structure of arc dovetail

and analyze arc dovetail and triangle transition structure in the joint of blade and dovetail

a new type of blade profile was designed.Based on aforementioned work

size constraint relations between the blade profile and dovetail's top face were built

the blade and dovetail's parameter model was created using ANSYS software

and the blade profile and dovetail's structure were optimized.The results indicate that the optimized back stress of the new structure is 827.11 MPa

down by 6.51% than the original structure;the quality of new structure of the blade/dovetail is 0.869 42 kg

down by 1.85% than the original structure;the distribution of stress is more uniform and stress gradient is smaller among dorsal throat

leaves basin throat and leaves body.On the whole

the blade profile of optimal blade and dovetail structure is better as compared with that of initial blade and dovetail structure.