基于统计有限元方法的自感结构数字孪晶

IF 2.4 Q3 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE
Eky Febrianto, Liam J. Butler, M. Girolami, F. Cirak
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引用次数: 15

摘要

摘要使用传感器网络监控基础设施资产正变得越来越普遍。设计和施工中常用的有限元(FE)模型形式的数字孪生可以帮助理解收集的大量传感器数据。本文演示了统计有限元方法(statFEM)在开发自感结构的数字孪生中的应用,该方法提供了一种综合数据和基于物理的模型的原理性方法。作为一个案例研究,考虑了位于英国斯塔福德郡附近西海岸干线沿线的一座长度为27.34\hskip1.5pt\mathrm{m}美元的仪表化铁路铁桥。利用从桥梁上部结构108个位置的光纤布拉格光栅传感器捕获的应变数据,statFEM可以预测“真实”的系统响应,同时考虑传感器读数、施加载荷和有限元模型指定错误的不确定性。在客运列车通过过程中,测量并模拟了沿两个主工字梁的纵向应变分布。statFEM数字孪生能够在没有测量数据的位置生成合理的应变分布预测,包括在沿着主工字梁的几个点和甚至没有安装传感器的结构元件上。对长期结构健康监测和评估的影响包括优化传感器布局,并在没有测量数据的位置和低负荷情况下进行更可靠的假设分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Digital twinning of self-sensing structures using the statistical finite element method
Abstract The monitoring of infrastructure assets using sensor networks is becoming increasingly prevalent. A digital twin in the form of a finite element (FE) model, as commonly used in design and construction, can help make sense of the copious amount of collected sensor data. This paper demonstrates the application of the statistical finite element method (statFEM), which provides a principled means of synthesizing data and physics-based models, in developing a digital twin of a self-sensing structure. As a case study, an instrumented steel railway bridge of $ 27.34\hskip1.5pt \mathrm{m} $ length located along the West Coast Mainline near Staffordshire in the UK is considered. Using strain data captured from fiber Bragg grating sensors at 108 locations along the bridge superstructure, statFEM can predict the “true” system response while taking into account the uncertainties in sensor readings, applied loading, and FE model misspecification errors. Longitudinal strain distributions along the two main I-beams are both measured and modeled during the passage of a passenger train. The statFEM digital twin is able to generate reasonable strain distribution predictions at locations where no measurement data are available, including at several points along the main I-beams and on structural elements on which sensors are not even installed. The implications for long-term structural health monitoring and assessment include optimization of sensor placement and performing more reliable what-if analyses at locations and under loading scenarios for which no measurement data are available.
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来源期刊
DataCentric Engineering
DataCentric Engineering Engineering-General Engineering
CiteScore
5.60
自引率
0.00%
发文量
26
审稿时长
12 weeks
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