Multi-fidelity Kriging extrapolation together with CFD for the design of the cross-section of a falling lifeboat

IF 0.6 Q4 ENGINEERING, MARINE
Robert Wenink, M. van der Eijk, Neil Yorke-Smith, Peter Wellens
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引用次数: 0

Abstract

Surrogate modelling techniques such as Kriging are a popular means for cheaply emulating the response of expensive Computational Fluid Dynamics (CFD) simulations. These surrogate models are often used for exploring a parameterised design space and identifying optimal designs. Multi-fidelity Kriging extends the methodology to incorporate data of variable accuracy and costs to create a more effective surrogate. This work recognises that the grid convergence property of CFD solvers is currently an unused source of information and presents a novel method that, by leveraging the data structure implied by grid convergence, could further improve the performance of the surrogate model and the corresponding optimisation process. Grid convergence states that the simulation solution converges to the true simulation solution as the numerical grid is refined. The proposed method is tested with realistic multi-fidelity data acquired with CFD simulations. The performance of the surrogate model is comparable to an existing method, and likely more robust. More research is needed to explore the full potential of the proposed method. Code has been made available online at https://github.com/robertwenink/MFK-Extrapolation.
多保真克里金推断法与 CFD 一起用于坠落救生艇的横截面设计
Kriging 等代理建模技术是一种常用的方法,可以廉价地模拟昂贵的计算流体动力学(CFD)模拟的响应。这些代用模型通常用于探索参数化设计空间和确定最佳设计。多保真度克里金法对该方法进行了扩展,将精度和成本可变的数据纳入其中,以创建更有效的代用模型。这项工作认识到 CFD 求解器的网格收敛特性是目前尚未使用的信息来源,并提出了一种新方法,通过利用网格收敛所隐含的数据结构,可进一步提高代用模型和相应优化过程的性能。网格收敛是指随着数值网格的细化,仿真解收敛到真正的仿真解。利用 CFD 模拟获得的真实多保真度数据对所提出的方法进行了测试。代用模型的性能与现有方法不相上下,而且可能更加稳健。要充分挖掘所提方法的潜力,还需要进行更多的研究。代码可在 https://github.com/robertwenink/MFK-Extrapolation 上在线获取。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.60
自引率
0.00%
发文量
8
期刊介绍: The journal International Shipbuilding Progress was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as: conceptual design structural design hydromechanics and dynamics maritime engineering production of all types of ships production of all other objects intended for marine use shipping science and all directly related subjects offshore engineering in relation to the marine environment ocean engineering subjects in relation to the marine environment
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