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URN etd-0911108-205523 Statistics This thesis had been viewed 2223 times. Download 959 times. Author Yen-jen Hu Author's Email Address No Public. Department Mechanical Engineering Year 2007 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 67 Title Structural Optimization of Truss Using Artificial Immune Algorithm Keyword Artificial Immune Algorithm Structural Optimization of Truss Structural Optimization of Truss Artificial Immune Algorithm Abstract Artificial immune algorithm uses the mechanisms of stimulation and suppression to search optimum solution for multimodal optimization. An adaptive mechanism was applied to adjust the population size according to the changes of search space. The artificial immune algorithm is utilized for structural optimization of truss in this study. The design variables are cross-sectional areas. The objective is to search the minimum weight of truss-structure subjected to the constraints of the maximum allowable stresses of members and the maximum allowable displacement of nodes. The proposed algorithm is revised in this study. For reducing the search space of antibody using 1/5-success rule is introduced. In order to reducing the cost of computation, the termination condition is also revised. Carrying out four truss-structure optimization problem, the results of artificial immune algorithm are similar to Deb’s results. The algorithm can also searches some different shape of truss-structure with similar weights. Advisor Committee Chun-yin Wu - advisor
Chien-jong Shih - co-chair
Guan-chun Luh - co-chair
Files Date of Defense 2008-07-31 Date of Submission 2008-09-12