• CN:11-2187/TH
  • ISSN:0577-6686

›› 2010, Vol. 46 ›› Issue (5): 158-167.

• 论文 • 上一篇    下一篇

轴系组件的结构检索方法

董雁;徐静   

  1. 绍兴文理学院机电工程系
  • 发布日期:2010-03-05

Structure Retrieval Method for Shaft Assemblies

DONG Yan;XU Jing   

  1. Department of Mechanical and Electrical Engineering, Shaoxing University
  • Published:2010-03-05

摘要: 针对轴系组件难以分类检索问题,提出一种基于结构相似的轴系组件检索方法。将零部件间联接面的配合所构成的联接抽象为装配副,通过装配放置约束和定性几何约束描述装配副元素间的几何关系,将组件划分为若干子结构,通过包含在不同子结构中同一零件功能表面间的连接关系描述子结构间的连接关系,并分别用装配连接图和子结构连接图建立组件结构模型,讨论了轴系组件子结构的划分方法。装配连接图和子结构连接图中的环结构和分支结构分别通过断环和圆括弧描述,这样,轴系结构就可以用字母和数字的线性序列来表示。借鉴化学数据库中化合物的线性符号表示法,对轴系结构进行编码,通过组件结构码,建立轴系组件的结构检索机制。并以圆锥齿轮悬臂支撑结构轴系组件为例验证方法的有效性。

关键词: 相似组件检索, 轴系结构, 轴系组件, UniTire, 非线性非稳态, 轮胎模型, 预测

Abstract: Aiming at difficultly sorting and retrieving shaft assemblies, a shaft assembly retrieval method based on structure similarity is presented. The connecting of mating surfaces between components is abstracted as assembly joint, assembly place constraint and qualitative geometrical constraint are introduced to describe the geometrical relation between assembly joint elements. Assemblies are divided into substructures and the connection relations between functional surfaces in same component, which are contained in different substructures, are introduced to describe connection relations between the substructures. The assembly structure model is built on the basis of assembly connection graph and substructure connection graph respectively. The method of dividing shaft assemblies into substructures is discussed. Branches in an assembly connection graph and a substructure connection graph are specified by enclosing them in parentheses, cyclic structures are represented by breaking one connection relation in each ring, in this way, the structure of a shaft assembly can be represented by a linear sequence of letters and digits. By referring to the linear sequence for compounds in chemical database, a structure coding method is presented. The structure retrieval mechanism of shaft assembly is presented. The method is validated by taking shaft assemblies of bevel gear cantilever support as example.

Key words: Shaft assembly, Shaft assembly structure, Similar assembly retrieval, Non-linear and non-steady, Prediction, UniTire, Tire model

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