.png){kind=icon}
返回
Laplace approximation in sparse Bayesian learning for structural damage detection
.png){kind=icon}
OA
AI
DOI：10.1016/j.ymssp.2020.106701.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
The Bayesian theorem has been demonstrated as a rigorous method for uncertainty assessment and system identification. Given that damage usually occurs at limited positions in the preliminary stage of structural failure, the sparse Bayesian learning has been developed for solving the structural damage detection problem. However, in most cases an analytical posterior probability density function (PDF) of the damage index is not available due to the nonlinear relationship between the measured modal data and structural parameters. This study tackles the nonlinear problem using the Laplace approximation technique. By assuming that the item in the integration follows a Gaussian distribution, the asymptotic solution of the evidence is obtained. Consequently the most probable values of the damage index and hyper-parameters are expressed in a coupled closed form, and then solved sequentially through iterations. The effectiveness of the proposed algorithm is validated using a laboratory tested frame. As compared with other techniques, the present technique results in the analytical solutions of the damage index and hyper-parameters without using hierarchical models or numerical sampling. Consequently, the computation is more efficient. (C) 2020 Elsevier Ltd. All rights reserved.
Keyword:
Sparse Bayesian learning
Structural damage detection
Laplace approximation
Vibration based methods
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
8.9
论文数:
1.3W
被引数:
6.6W
机构
引用论文
Hierarchical sparse Bayesian learning for structural damage detection: Theory, computation and application.png)
STRUCTURAL SAFETY
STRUCTURAL SAFETYIF6.3
PREAI
分享收藏Kernquadrupolresonanz in trans-Dichloro-di�thylendiaminkobalt(III)-chlorid反式-二氯-二-thylendiaminkobalt(III)-chlorid中的kernquipolresonz
PREAI
分享收藏Lumbar spondylolisthesis associated with systemic sclerosis-related spinal calcinosis: an unusual clinical caseRheumatologyOAAI
RheumatologyIF0
OAAI分享收藏
查看更多内容