Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Reliability-Based Topology Optimization for Structures with Stiffness Constraints

강성구속 조건을 갖는 구조물의 신뢰성기반 위상최적설계

  • 김상락 (한양대학교 기계공학과) ;
  • 박재용 (한양대학교 일반대학원 기계공학과) ;
  • 이원구 (한양대학교 일반대학원 기계공학과) ;
  • 유진식 (한양대학교 일반대학원 기계공학과) ;
  • 한석영 (한양대학교 기계공학부)
  • Published : 2008.12.15
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Abstract

This paper presents a Reliability-Based Topology Optimization(RBTO) using the Evolutionary Structural Optimization(ESO). An actual design involves some uncertain conditions such as material property, operational load and dimensional variation. The Deterministic Topology Optimization(DTO) is obtained without considering the uncertainties related to the uncertainty parameters. However, the RBTO can consider the uncertainty variables because it has the probabilistic constraints. In order to determine whether the probabilistic constraints are satisfied or not, simulation techniques and approximation methods are developed. In this paper, the reliability index approach(RIA) is adopted to evaluate the probabilistic constraints. In order to apply the ESO method to the RBTO, sensitivity number is defined as the change in the reliability index due to the removal of the ith element. Numerical examples are presented to compare the DTO with the RBTO.

Keywords

References

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