期刊
RELIABILITY ENGINEERING & SYSTEM SAFETY
卷 214, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ress.2021.107734
关键词
Uncertainty quantification; Sensitivity analysis; Surrogate modelling; Semi-intrusive method; Gaussian process regression; Convolutional neural network; Multiscale simulation
资金
- Netherlands eScience Center [27015G01]
- European Union Horizon 2020 research and innovation programme, The Netherlands [800925, 777119]
- Russian Foundation for Basic Research [18015-00504]
- Russian Science Foundation [20-71-10108]
- NWO Exacte Wetenschappen (Physical Sciences), The Netherlands
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (Netherlands Organization for Science Research, NWO)
- H2020 Societal Challenges Programme [777119] Funding Source: H2020 Societal Challenges Programme
- Russian Science Foundation [20-71-10108] Funding Source: Russian Science Foundation
This study investigates the response of the In-Stent Restenosis 2D model using various uncertainty quantification methods. By utilizing Gaussian process regression and convolutional neural networks, effective estimation of uncertainty and sensitivity is achieved, yielding results comparable to traditional methods.
The In-Stent Restenosis 2D model is a full y coupled multiscale simulation of post-stenting tissue growth, in which the most costly submodel is the blood flow simulation. This paper presents uncertainty estimations of the response of this model, as obtained by both non-intrusive and semi-intrusive uncertainty quantification. A surrogate model based on Gaussian process regression for non-intrusive uncertainty quantification takes the whole model as a black-box and maps directly the three uncertain inputs to the quantity of interest, the neointimal area. The corresponding uncertain estimates matched the results from quasi-Monte Carlo simulations well. In the semi-intrusive uncertainty quantification, the most expensive submodel is replaced with a surrogate model. We developed a surrogate model for the blood flow simulation by using a convolutional neural network. The semi-intrusive method with the new surrogate model offered efficient estimates of uncertainty and sensitivity while keeping a relatively high accuracy. It outperformed the results obtained with earlier surrogate models. It also achieved the estimates comparable to the non-intrusive method with a similar efficiency. Presented results on uncertainty propagation with non-intrusive and semi-intrusive metamodelling methods allow us to draw some conclusions on the advantages and limitations of these methods.
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