Research and Application of a Civil Aircraft Structure Modeling Method

Abstract

Structural modeling takes lots of time and energy of engineers in the process of civil aircraft design,so the rapid structural modeling is one of the key methods to raise the efficiency of structure design.A rapid structure modeling method for civil aircraft is proposed,which is based on the secondary development technology of CATIA(computer aided tri-dimensional interface application).The frequently used part models are decomposed into the combination of typical machining features based on analyzing and summarizing of the common civil aircraft structure model.A CATIA knowledge template is created for each feature,and then,a structural feature template library is established to integrate all templates.Component application architecture(CAA)secondary development technology is used to design a visual interface which can call feature templates from the library.On this foundation,the structure model is created by simulating the material reduction process and calling the machining feature template one by one.Taking the aircraft skin subsidence characteristics as an example,the modeling efficiency and quality of the proposed model and traditional Bell operation modeling method are compared.The results show that the structure modeling efficiency and quality of the proposed modeling method are significantly improved.

Keywords

• catia
• user defined feature
• component application architecture
• civil aircraft structure
• modeling method