Structure design and shape optimization in arc dovetail

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.