English  |  正體中文  |  简体中文  |  Items with full text/Total items : 55023/89277 (62%)
Visitors : 10604497      Online Users : 18
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/35565

    Title: 結合基因演算法及模擬退火法於結構最佳化設計之研究
    Other Titles: A study of structural optimization by genetic algorithms with simulated annealing
    Authors: 林仲甫;Lin, Chung-fu
    Contributors: 淡江大學航空太空工程學系碩士班
    張永康;Chang, Yeong-kang
    Keywords: 有限元素法;基因演算法;模擬退火法;最佳化設計;Finite element method;Genetic algorithms;Simulated Annealing;Optimum Method
    Date: 2005
    Issue Date: 2010-01-11 06:47:07 (UTC+8)
    Abstract: 本研究結合基因演算法及模擬退火法兩種不同的最佳化方法,再配合ANSYS有限元素分析軟體,以尋求結構最佳化之設計。基因演算法的優點為採用全域性隨機搜尋的方式選取設計參數值,而在最佳化的過程中僅針對適存函數作處理,如此便可避免複雜的非線性問題,接著以模擬退火法判定解被接受的機率,並有效率地跨過區域最佳解,避免最佳解淪為區域最佳解。最佳化的過程中,吾人以結構最佳化問題之目標函數及限制條件訂定適存函數,經由ANSYS有限元素分析軟體求得適存函數所需之值,而後比較各設計參數之適存度,適存度較高之設計參數經過複製、交配及突變等過程,產生更好的設計參數,再以模擬退火法判斷解被接受之機率,尋求全域最佳值。
    In order to obtain the optimum design of a structure, a hybrid method which combined Simulated Annealing and Genetic Algorithm will be adopted in this study. The advantage of Genetic Algorithms is that it has multi-point search strategy instead of one-point search to find the global optimum in a space and the advantage of Simulated Annealing is that it can makes the program have the capability to jump over the local optimum and obtain the global optimum. Therefore, the Genetic Algorithm and Simulated Annealing can be combined together to improve the process efficiency. The new design can be obtained by three basic operators: reproduction, crossover, and mutation. The fitness function in Genetic Algorithm will be developed by finite element software ANSYS program, which is used many aerospace industry.
    In this study, the minimum weight design and maximum the first natural frequency of different structural problems will be discussed in numerical examples. We hope the results of this study can provide a useful hybrid method for the design of structure.
    Appears in Collections:[Graduate Institute & Department of Aerospace Engineering] Thesis

    Files in This Item:

    File SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback