Research on CAD Design System of Aero-engine Blade Tenon with Case-based Reasoning Technique

Blade tenon has characteristics of complex structure,many varieties,long design and manufacture period.How to efficiently and easily design the blade tenon is of significance for shortening development cycle of aero-engine.This paper classifies blade tenon according to structure,establishes parametric dimension-driven tenon case library,and uses case-based reasoning(CBR) design approach to design the tenon.By means of modifying and optimizing the best case of the tenon case library,a new tenon is designed.This method can shorten the design cycle greatly and improve the efficiency of blade design significantly.Therefore,it's important for the blade design to development the blade tenon CAD system based on CBR.