Sequential Reliability Analysis Framework for Multidisciplinary Systems

Abstract

This study presents an ecien t strategy for reliability analysis under multidisciplinary analysis systems. Existing methods have performed the reliability analysis using the nonlinear optimization techniques. This is mainly due to the fact that they directly apply Multidisciplinary Design Optimization(MDO) frameworks to the reliability analysis formulation. Accordingly, the reliability analysis and the Multidisciplinary Analysis(MDA) are tightly coupled in a single optimizer, which hampers utilizing the recursive and functionapproximation based reliability analysis methods such as the Advanced First Order Reliability Method(AFORM). In order to utilize the ecien t reliability analysis method under multidisciplinary analysis systems, we propose a new strategy named Sequential Approach on Reliability Analysis under Multidisciplinary analysis systems(SARAM). In this approach, the reliability analysis and the MDA are decomposed and arranged in a sequential manner, making a recursive loop. The eciency of the SARAM method was veried using two illustrative examples taken from the literatures. Compared with existing methods, it showed the least number of subsystem analyses over the other methods while maintaining accuracy.

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