The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1996
Filed:
May. 02, 1994
Nobutaka Ito, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of designing an optimum skeleton structure uses a computer to obtain a skeleton structure from a density distribution within a 2 or 3 dimensional design region which is obtained as an optimum shape of a mechanical structure, where the design region is divided into finite elements each having a density D assigned thereto. The method includes the steps of (a) inputting a first reference value D.sub.S of the density D, (b) regarding a point within the design region where an external force is applied as one of starting point candidates, (c) selecting a starting point which is non-selected from the starting point candidates, (d) extending a line from the starting point and passing through the finite element satisfying D.gtoreq.D.sub.S so that the line is as straight as possible, and (e) stopping the extension of the line and regarding the line as a skeleton member when no adjacent finite element satisfying D.gtoreq.D.sub.S exists or when a non-selected starting point candidate is reached. The steps (c) through (e) are repeated until no more non-selected starting point candidate exists.