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Dynamic reliability and variance-based global sensitivity analysis of pipes conveying fluid with both random and convex variables

Bingqian Chen (Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, China)
Anqiang Wang (Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, China)
Qing Guo (Department of Engineering Mechanics, Northwestern Polytechnic University, Fremont, California, USA)
Jiayin Dai (Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, China)
Yongshou Liu (Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 31 August 2020

Issue publication date: 17 June 2021

162

Abstract

Purpose

This paper aims to solve the problem that pipes conveying fluid are faced with severe reliability failures under the complicated working environment.

Design/methodology/approach

This paper proposes a dynamic reliability and variance-based global sensitivity analysis (GSA) strategy with non-probabilistic convex model for pipes conveying fluid based on the first passage principle failure mechanism. To illustrate the influence of input uncertainty on output uncertainty of non-probability, the main index and the total index of variance-based GSA analysis are used. Furthermore, considering the efficiency of traditional simulation method, an active learning Kriging surrogate model is introduced to estimate the dynamic reliability and GSA indices of the structure system under random vibration.

Findings

The variance-based GSA analysis can measure the effect of input variables of convex model on the dynamic reliability, which provides useful reference and guidance for the design and optimization of pipes conveying fluid. For designers, the rankings and values of main and total indices have essential guiding role in engineering practice.

Originality/value

The effectiveness of the proposed method to calculate the dynamic reliability and sensitivity of pipes conveying fluid while ensuring the calculation accuracy and efficiency in the meantime.

Keywords

Acknowledgements

This research is sponsored by Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX202030).

Citation

Chen, B., Wang, A., Guo, Q., Dai, J. and Liu, Y. (2021), "Dynamic reliability and variance-based global sensitivity analysis of pipes conveying fluid with both random and convex variables", Engineering Computations, Vol. 38 No. 4, pp. 1789-1806. https://doi.org/10.1108/EC-06-2020-0299

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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