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Collaborative Reliability Analysis for Multidisciplinary Systems Design

29 citations0/0 files storedAIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization (MAO)

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Probabilistic and Robust Engineering Design Reliability and Maintenance Optimization Systems Engineering Methodologies and Applications

Abstract

Traditional Multidisciplinary Design Optimization (MDO) generates deterministic optimal designs, which are frequently pushed to the limits of design constraint boundaries, leaving little or no room to accommodate uncertainties in system input, modeling, and simulation. As a result, the design solution obtained may be highly sensitive to the variations of system input which will lead to performance loss and the solution is often risky (high likelihood of undesired events). Reliability-based design is one of the alternative techniques for design under uncertainty. The natural method to perform reliability analysis in multidisciplinary systems is the all-in-one approach where the existing reliability analysis techniques are applied directly to the systemlevel multidisciplinary analysis. However, the all-onone reliability analysis method requires a double loop procedure and therefore is generally very time consuming. To improve the efficiency of reliability analysis under the MDO framework, a collaborative reliability analysis method is proposed in this paper. The procedure of the traditional Most Probable Point (MPP) based reliability analysis method is combined with the collaborative disciplinary analyses to automatically satisfy the interdisciplinary consistency in reliability analysis. As a result, only a single loop procedure is required and all the computations are conducted concurrently at the individual disciplinelevel. Compared with the existing reliability analysis methods in MDO, the proposed method is more efficient and therefore provides a cheaper tool to evaluate design feasibility in MDO under uncertainty. Two examples are used for the purpose of verification.

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References

1974Exact and Invariant Second-Moment Code Format 1990Advanced probabilistic structural analysis method for implicit performance functions 1999Towards a Better Understanding of Modeling Feasibility Robustness in Engineering Design 1986An efficient sampling method for probability of failure calculation 2002Efficient uncertainty analysis methods for multidisciplinary robust design 2000Methodology for Managing the Effect of Uncertainty in Simulation-Based Design 1999Robust Design Simulation: A Probabilistic Approach to Multidisciplinary Design 2000A Most Probable Point Based Method for Uncertainty Analysis

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2013An efficient strategy for multidisciplinary reliability design and optimization based on CSSO and PMA in SORA framework 2015A Spatial-Random-Process Based Multidisciplinary System Uncertainty Propagation Approach With Model Uncertainty 2013Sequential optimisation and reliability assessment for multidisciplinary design optimisation under hybrid uncertainty of randomness and fuzziness 2016Reduction of Epistemic Model Uncertainty in Simulation-Based Multidisciplinary Design

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