Application of Fuzzy Theory for Structural Topology Optimization

• Main Authors: Fang-Bin Hu, 胡芳斌
• Other Authors: 張永康
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/16736911515539457525

碩士 === 淡江大學 === 航空太空工程學系碩士班 === 96 === A methodology of topology optimization design by fuzzy theory was used in this study. The concept of fuzzy theory used in this study is to find the applicable membership function and the Pareto solution of multi-objective optimization problem. The finite element analysis software ANSYS was used for structural analysis. The optimum shape design was obtained by the concept of material distribution borrowed from density method with sequential linear programming. Three stages topology design were employed in this study. In addition to using the element growth-removal combined method (EGRCM) to decrease the absurd situation, the concept of B-spline curve was used to smooth the design shape. After three stages design strategy , the primitive optimum design can be improved to more practical design. Different multi-objective optimization problems were discussed in the numerical examples. The results of final design were more considerable than that only to consider single-objective optimization problem in the traditional topology design. We hope the results of this study can provide the convenience of manufacturing to the industry of structural design.