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이태희(Tae Hee Lee),최운용(Woonyong Choi),김홍선(Hongsun Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
The need to increase the reliability of a structural system has been significantly brought in the procedure<br/> of real designs to consider, for instance, the material properties or geometric dimensions that reveal a random<br/> or incompletely known nature. Reliability based design optimization of a real system now becomes an<br/> emerging technique to achieve reliability, robustness and safety of these problems. Finite element analysis<br/> program and the reliability analysis program are necessary to evaluate the responses and the probabilities of<br/> failure of the system, respectively. Moreover, integration of these programs is required during the procedure<br/> of reliability based design optimization. It is well known that reliability based design optimization can often<br/> have so many local minima that it cannot converge to the specified probability of failure. To overcome this<br/> problem, barrier function method in reliability based design optimization is suggested. To illustrate the<br/> proposed formulation, reliability based design optimization of a bracket is performed. AMV and FORM are<br/> employed for reliability analysis and their optimization results are compared based on the accuracy and<br/> efficiency.