Turbine Blade Modeling Cad System

Turbine Blade is seen as one key part of the aero-engine. The research of the development of Turbine Blade Modeling CAD system will improve the Blade design efficiency greatly while shorten the Blade design period.In this thesis, the key technologies of Turbine Blade Modeling CAD system are studied based on the deep analysis of the Turbine Blade Modeling. The following are listed works done on this topic:A joining method is given to create the smooth section profile curves of Turbine Blade. The Sew method, Through Curve method and Through Curve Mesh method are presented to construct the Turbine Blade surface which is a free 3D surface.The uneven-thickness algorithm is given to .create the section data of inner Blade. And a parametric method is used for the modeling of the Pin Fin, Spanwise Rib, and Chordwise Rib after delebrately studying their regular structures. By using all these methods, a Turbine Blade model with complex inner cavity can be achieved.Based on the the analysis of structure and design process of Turbine Blade, the Normal Design Rules of Turbine Blade are presented in this paper which are realized by the way of the Design Wizard in the Modeling System.A feature information model is proposed to combine the design information and the geometric information of Turbine Blade in a same model. Built on this feature information model, more fruitful work such as the management of design data, the saving steps of the design process and the rebuilding of the solid modeling can be achieved.