Abstract: To accumulate and reuse the valuable knowledge in the aviation elastomeric seals structure design cases effectively,the method of MBD-based sealing structures case base construction was proposed. Firstly,the MBD based case content framework and representation of the aviation sealing structure were established based on the industry design standards of aviation elastomeric sealing structure and the 3D modeling and annotation of MBD,and the case representation was implemented by SolidWorks MBD module. Then,the geometric and semantic features from the MBD based case representation of sealing structures were extracted which were used to design case retrieval method. Finally,the MBD based case prototype system for aviation elastomeric sealing structure and its application show that the MBD based sealing structure case representation and retrieval have achieved knowledge accumulation and application.

Key words: Model Based Definiton (MBD), sealing structure, geometric feature, semantic feature, case base