FEATURE-BASED CAx GEOMETRY MODEL OF COMPRESSOR DISKS FOR MULTIDISCIPLINARY OPTIMIZATION

A feature-based geometry model is introduced which enables multidisciplinary optimization that accords with the design process by changing the detail level of a geometry. The details of the design can be changed during the optimization without having to completely change the structure and topology of the previously created geometry. The geometry is generated by combining primitive objects using Boolean operations. These primitive objects are meshable sheets or solids. A feature is defined by combining these primitives with information objects that contain all the information needed both for the definition and restriction of the geometry and for the optimization process. Knowledge of finite element grid generation has been implemented which extends the solid modeling technique and enables an automated mesh preprocessing and a fully automated mesh generation with quadrilateral elements. This featurebased geometry model is applied to a rotor disk of a high pressure compressor.