Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/140090
Title: A novel methodology of reliability-based multidisciplinary design optimization under hybrid interval and fuzzy uncertainties
Authors: Wang, Lei
Xiong, Chuang
Yang, Yaowen
Keywords: Engineering::Civil engineering
Issue Date: 2018
Source: Wang, L., Xiong, C., & Yang, Y. (2018). A novel methodology of reliability-based multidisciplinary design optimization under hybrid interval and fuzzy uncertainties. Computer Methods in Applied Mechanics and Engineering, 337, 439-457. doi:10.1016/j.cma.2018.04.003
Journal: Computer Methods in Applied Mechanics and Engineering
Abstract: Various uncertainties exist in engineering practice, which brings adverse effects to the reliability of complicated engineering systems. Considering the case that interval and fuzzy uncertainties exist simultaneously, a new reliability estimation model is proposed based on the level cut strategy and volume ratio theory. The new reliability model is better than the traditional one which is very conservative. Moreover, a sequential optimization and reliability assessment (SORA) approach for multidisciplinary systems under hybrid interval and fuzzy uncertainties is developed to decouple the reliability analysis from the deterministic multidisciplinary design optimization (MDO). In the framework of SORA, the deterministic MDO and reliability analysis are executed sequentially, thus the efficiency can be improved. For the multidisciplinary uncertainty analysis, the first order Taylor expansion method and the interval vertex method are formulated. The calculation of the safety possibility under the volume ratio theory and the calculation of the shifting distance are deduced. Both numerical and engineering examples are employed to demonstrate the validity of the proposed method.
URI: https://hdl.handle.net/10356/140090
ISSN: 0045-7825
DOI: 10.1016/j.cma.2018.04.003
Rights: © 2018 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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