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An adaptive multiple-Kriging-surrogate method for time-dependent reliability analysis

机译:用于时间依赖性可靠性分析的自适应多克里格 - 替代方法

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摘要

For accurately and efficiently estimating the time-dependent failure probability (TDFP) of the structure, a novel adaptive multiple-Kriging-surrogate method is proposed. In the proposed method, the multiple Kriging models with different regression trends (i.e., constant, linear and quadratic) are simultaneously constructed with the highest accuracy, on which the TDFP can be obtained. The multiple regression trends are adaptively selected based on the size of sample base, the maximum differences of multiple models and the global accuracy of multiple models. After that, the most suitable multiple regression trends are identified. The proposed method can avoid man-made subjectivity for regression trend in general Kriging surrogate method. Furthermore, better accuracy and efficiency will be obtained by the proposed multiple surrogates than just using a fixed regression model for some engineering applications. Five examples involving four applications with explicit performance function and one tone arch bridge under hurricane load example with implicit performance function are introduced to illustrate the effectiveness of the proposed method for estimating TDFP. (C) 2019 Elsevier Inc. All rights reserved.
机译:为了准确和有效地估计结构的时间依赖性失效概率(TDFP),提出了一种新的自适应多克里格替代方法。在所提出的方法中,具有不同回归趋势的多个克里格模型(即,恒定,线性和二次)同时以最高精度构造,在其上可以获得TDFP。基于样本基础的大小,多种模型的最大差异以及多种模型的全球精度自适应选择多元回归趋势。之后,确定最合适的多元回归趋势。所提出的方法可以避免人工主观性,以克里格替代方法的回归趋势。此外,所提出的多种代理比仅使用用于某些工程应用的固定回归模型,将获得更好的准确性和效率。介绍了五个涉及具有明确性能函数和一个音调拱桥在具有隐式性能函数下的一个音调拱桥的五个例子,以说明所提出的方法估计TDFP方法的有效性。 (c)2019 Elsevier Inc.保留所有权利。

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