关键词: 机械结构, 结构形态, 基本体, 扫掠方法, 螺旋扶蔗器

Abstract: To simplify the retrieval process for 3D model and improve the design efficiency for mechanical structure based on analysis of skeleton research,an extraction method of mechanical structure morphology was presented.On this basis,an extraction architecture which included knowledge base of primitive,data base,basic rules and morphology fusion process of primitive was proposed.According to the analysis of construction features of primitive,a transformation model was created to unify all primitives to a representation of sweep volume.The primitive mainly divided into three types: single surface primitive,variable scale polyhedron and invariable scale polyhedron,and the extraction rules of primitive morphology with its fusion rules were presented to realize the extraction of mechanical structure morphology.The extraction process of mechanical structure morphology and its extraction feasibility were demonstrated by an illustrative example of spiral sugarcane propping device.The extraction method of mechanical structure morphology provided a new research direction in feature simplification for mechanical structure,and theoretical foundation to study mechanical principle morphology.

Key words: mechanical structure, structure morphology, primitive, sweep method, spiral sugarcane propping device