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논문 기본 정보

자료유형
학술저널
저자정보
Tamijani, Ali Y. (Department of Aerospace Engineering, Embry-Riddle Aeronautical University) Mulani, Sameer B. (Department of Aerospace Engineering and Mechanics, University of Alabama) Kapania, Rakesh K. (Department of Aerospace and Ocean Engineering, Virginia Tech)
저널정보
테크노프레스 Advances in aircraft and spacecraft science Advances in aircraft and spacecraft science 제4권 제4호
발행연도
2017.1
수록면
467 - 486 (20page)

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A method for decoupling reliability based design optimization problem into a set of deterministic optimization and performing a reliability analysis is described. The inner reliability analysis and the outer optimization are performed separately in a sequential manner. Since the outer optimizer must perform a large number of iterations to find the optimized shape and size of structure, the computational cost is very high. Therefore, during the course of this research, new multilevel reliability optimization methods are developed that divide the design domain into two sub-spaces to be employed in an iterative procedure: one of the shape design variables, and the other of the size design variables. In each iteration, the probability constraints are converted into equivalent deterministic constraints using reliability analysis and then implemented in the deterministic optimization problem. The framework is first tested on a short column with cross-sectional properties as design variables, the applied loads and the yield stress as random variables. In addition, two cases of curvilinearly stiffened panels subjected to uniform shear and compression in-plane loads, and two cases of curvilinearly stiffened panels subjected to shear and compression loads that vary in linear and quadratic manner are presented.

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