Assembly model similar structure search system, and assembly model similar structure search method

摘要

Provided is a technology for efficiently extracting from sub-assemblies designed in the past a sub-assembly similar to a newly designed sub-assembly. A system is adopted where information about an assembly model created by 3D-CAD is stored in a database, and an assembly portion to be searched for is also input as a 3D assembly model. A feature value and shape similarity of components of a sub-assembly as the object of search, and the degree of partial correspondence in adjacency relationship of the components are determined, and the similar sub-assembly is extracted from the entire assembly model. By a search system such that a component requiring shape similarity consideration and a component not requiring shape similarity consideration are mixed and the similarity of the adjacency relationship of the components is inquired, the entire assembly model is searched for a sub-assembly portion similar to a predetermined sub-assembly. Further, in an assembly structure search, constituent components that are partially different in configuration and that do not completely correspond are also searched, and the degree of correspondence is presented quantitatively.