한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제19권5호
  • /
  • Pages.27-37
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  • 2020
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  • 1598-6721(pISSN)
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  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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근사모델과 후처리를 이용한 트러스 구조물의 이산 치수설계

Discrete Sizing Design of Truss Structure Using an Approximate Model and Post-Processing

  • Lee, Kwon-Hee (Department of Mechanical Engineering, Dong-A University)
  • 투고 : 2020.01.24
  • 심사 : 2020.03.22
  • 발행 : 2020.05.31
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초록

Structural optimization problems with discrete design variables require more function calculations (or finite element analyses) than those in the continuous design space. In this study, a method to find an optimal solution in the discrete design of the truss structure is presented, reducing the number of function calculations. Because a continuous optimal solution is the Karush-Kuhn-Tucker point that satisfies the optimality condition, it is assumed that the discrete optimal solution is around the continuous optimum. Then, response values such as weight, displacement, and stress are predicted using approximate models-referred to as hybrid metamodels-within specified design ranges. The discrete design method using the hybrid metamodels is used as a post-process of the continuous optimization process. Standard truss design problems of 10-bar, 25-bar, 15-bar, and 52-bar are solved to show the usefulness of this method. The results are compared with those of existing methods.

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참고문헌

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