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An efficient reliability analysis approach for structure based on probability and probability box models

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Abstract

In this paper, a new reliability analysis method for engineering structures is developed based on probability and probability box (p-box) models. Random variable distributions are used to deal with the uncertain parameters with sufficient information, while the p-box models are employed to deal with the uncertain-but-bounded variables. Due to the existence of the p-box parameters, a limit-state band will result and a complex nesting optimization problem will be involved in this reliability analysis. To reduce the computational burden, an efficient decoupling strategy is developed to solve the nesting optimization problem. Through interval analysis for the probability transformation process, the complex nesting optimization problem can be transformed to a single-layer optimization model. Then, the optimum solution and corresponding reliability index can be obtained by introducing a sequential quadratic programming (SQP) method. Four engineering numerical examples are investigated to demonstrate the effectiveness of the present method.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant No.51305047, 51475048), the Specialized Research Fund for the Doctoral Program of Higher Education (New Teachers: 20134316120003) and the Science Fundation of State Key Laboratory for Strength and Vibration of Mechanical Structures (No.SV2016-KF-09). The authors would also like to thank anonymous reviewers for their valuable comments.

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Authors and Affiliations

  1. Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha, 410004, People’s Republic of China

    Xin Liu, Lairong Yin, Lin Hu & Zhiyong Zhang

  2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Xin Liu

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  1. Xin Liu
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  2. Lairong Yin
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Correspondence to Xin Liu.

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Liu, X., Yin, L., Hu, L. et al. An efficient reliability analysis approach for structure based on probability and probability box models. Struct Multidisc Optim 56, 167–181 (2017). https://doi.org/10.1007/s00158-017-1659-7

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  • DOI: https://doi.org/10.1007/s00158-017-1659-7

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