| Summary: | 碩士 === 國立中正大學 === 機械系 === 90 === A multi-stage topology optimization method based upon the strategies of contracting the design domain then reducing number of the design variables of the structure in each optimized stages was developed. Three modules, a structural analysis code, an optimization subroutine and a topology algorithm were integrated as a single design system. This system provides a user-friendly environment for engineers to perform easily the multi-stage topology optimization. In order to have a clear topology layout more efficiently, three methodologies were proposed, the element growth method (EGM), the element removal method (ERM) and the element growth-removal combined method (EGRCM). Results show that all three methods can achieve a clearer topology layout than classical methods. Three methods are compared with each other in efficiency and the clearness of final topology layout through a two-dimensional cantilever plate problem. Results also show that EGRCM is the most efficient method and has the clearest topology layout. For engineering applications, the topology design of a 3-D spindle and a column of a CNC machine were demonstrated using the integrated multi-stage optimization design system. Then the resulting topologies of the spindle and the column can be used as conceptual designs for further embodiment designs.
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