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Nonprobabilistic time-dependent reliability analysis for uncertain structures under interval process loads
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DOI：10.1016/j.probengmech.2024.103687.png)
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摘要
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In this paper, a novel nonprobabilistic analysis framework is proposed to evaluate the time-dependent reliability of uncertain structures under time-varying loads. Firstly, a novel uncertainty propagation method is developed by combining interval process integration and surrogate-based interval analysis and the correlation coefficient between responses of adjacent time steps is further analyzed. Subsequently, the nonprobabilistic time-dependent reliability is analyzed base on the first-passage theory and the established interval model. Unlike existing nonprobabilistic methods that consider time-invariant external loads, the proposed method applies an interval process to describe time-varying external loads, thereby offering a broader range of applicability. Compared to existing nonprobabilistic methods that consider time-varying loads, the proposed method establishes a more refined nonprobabilistic time-dependent reliability model based on the first passage theory, achieving higher accuracy. The effectiveness and superiority of the proposed method are validated through a numerical example and an engineering application.
Keyword:
Time-varying uncertainty
Interval process
Nonprobabilistic analysis
Time-dependent reliability
Kriging surrogate model
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3.5
论文数:
1.7K
被引数:
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