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An inverse analysis method for design optimization with both statistical and fuzzy uncertainties

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Abstract

If the statistical data for the input uncertainties are sufficient to construct the distribution function, the input uncertainties can be treated as random variables to use the reliability-based design optimization (RBDO) method; otherwise, the input uncertainties can be treated as fuzzy variables to use the possibility-based design optimization (PBDO) method. However, many structural design problems include both input uncertainties with sufficient and insufficient data. This paper proposes a new mixed-variable design optimization (MVDO) method using the performance measure approach (PMA) for such design problems. For the inverse analysis, this paper proposes a new most probable/possible point (MPPP) search method called maximal failure search (MFS), which is an integration of the enhanced hybrid mean value method (HMV+) and maximal possibility search (MPS) method. This paper also improves the HMV+ method using an angle-based interpolation. Mathematical and physical examples are used to demonstrate the proposed inverse analysis method and MVDO method.

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Correspondence to K. K. Choi.

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Du, L., Choi, K.K. An inverse analysis method for design optimization with both statistical and fuzzy uncertainties. Struct Multidisc Optim 37, 107–119 (2008). https://doi.org/10.1007/s00158-007-0225-0

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  • DOI: https://doi.org/10.1007/s00158-007-0225-0

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