科创中国

原文链接：万方

• 作者：

  WANG Zhansong,TIAN Ling,DUAN Wenrui

• 摘要：

  CAD model retrieval based on functional semantics is more significant than content-based 3D model retrieval during the mechanical conceptual design phase. However, relevant research is still not fully discussed. Therefore, a functional semantic-based CAD model annotation and retrieval method is proposed to support mechanical conceptual design and design reuse, inspire designer creativity through existing CAD models, shorten design cycle, and reduce costs. Firstly, the CAD model functional semantic ontology is constructed to formally represent the functional semantics of CAD models and describe the mechanical conceptual design space comprehensively and consistently. Secondly, an approach to represent CAD models as attributed adjacency graphs(AAG) is proposed. In this method, the geometry and topology data are extracted from STEP models. On the basis of AAG, the functional semantics of CAD models are annotated semi-automatically by matching CAD models that contain the partial features of which functional semantics have been annotated manually, thereby constructing CAD Model Repository that supports model retrieval based on functional semantics. Thirdly, a CAD model retrieval algorithm that supports multi-function extended retrieval is proposed to explore more potential creative design knowledge in the semantic level. Finally, a prototype system, called Functional Semantic-based CAD Model Annotation and Retrieval System(FSMARS), is implemented. A case demonstrates that FSMARS can successfully botain multiple potential CAD models that conform to the desired function. The proposed research addresses actual needs and presents a new way to acquire CAD models in the mechanical conceptual design phase.

• 关键词：

  conceptual design functional semantics attributed adjacency graph CAD Model Repository multi-function extended retrieval

• 作者单位：

  State Key Laboratory of Tribology & Institute of Manufacturing Engineering,Department of Mechanical Engineering,Tsinghua University%Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control,Tsinghua University

• 基金项目：

  Supported by National Natural Science Foundation of China (Grant No.51175287)%National Science and Technology Major Project of China (Grant No.2011ZX02403)

• 来源期刊：

  中国机械工程学报(英文版)

• 年，卷(期)：

  2014006