Abstract
A trust region based reliability analysis that performs a bounded Most Probable Point search is developed. This facilitates screening of non-critical failure modes as well as makes possible the use of Multidisciplinary Design Optimization (MDO) approaches to perform reliability analysis for multidisciplinary problems. A Reliability Based Optimization (RBO) framework that uses MDO approaches in the reliability analysis as well as in the optimization is presented. The method allows the use of both hard and deterministic constraints, and also allows constraint screening within the RBO framework. The framework is implemented for a simple demonstration problem. The trust region based reliability analysis is implemented for a variation of a control augmented structures problem used in various MDO studies. The trust region based reliability analysis was successful in performing bounded MPP searches in the constraint screening process and was instrumental in the success of the MDO version of the reliability analysis.
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