可靠确定盐岩力学组成模型参数的多步骤校准策略

IF 7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL International Journal of Rock Mechanics and Mining Sciences Pub Date : 2024-09-28 DOI:10.1016/j.ijrmms.2024.105922
Hermínio T. Honório , Maartje Houben , Kevin Bisdom , Arjan van der Linden , Karin de Borst , Lambertus J. Sluys , Hadi Hajibeygi
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引用次数: 0

摘要

在盐洞中储存可再生氢需要快速注入和生产,以应对能源生产和消费之间的不平衡。这就引起了人们对盐洞在这种运行条件下的机械稳定性的关注。使用适当的盐力学构成模型是研究这一问题的重要一步,因此文献中提出了许多具有多个参数的构成模型。然而,如何根据应力应变数据集可靠地确定哪个模型和参数集代表给定的岩石,仍然是一个尚未解决的难题。在本文中,我们首次提出了一种多步骤策略,可根据盐岩的多个变形数据集确定单一参数集。为此,我们首先开发了一个全面的构成模型,能够捕捉瞬态、反向和稳态蠕变的所有相关非线性变形物理特性。然后,将校准过程作为一个优化问题,采用全局粒子群优化算法来确定单组代表性材料参数。为了实现动态数据集成,我们开发了一种多步骤校准策略,以便在实验可用时一次纳入一个实验。此外,由于实验岩石样本中存在轻微的异质性,我们的优化策略也变得灵活,以适应这种轻微的异质性。所设计的优化策略基于多物理场综合结构建模框架,可为所有变形数据集提供一套具有代表性的材料属性。为了对所提出的方法进行严格的数学分析,并解决缺乏相关实验数据集的问题,我们从文献中现有的稀疏相关数据中汲取灵感,考虑了一系列合成实验数据集。我们的性能分析结果表明,所提出的校准策略是稳健的。此外,随着可用数据集的增多,结果也越来越精确。
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A multi-step calibration strategy for reliable parameter determination of salt rock mechanics constitutive models
The storage of renewable hydrogen in salt caverns requires fast injection and production rates to cope with the imbalance between energy production and consumption. This raises concerns about the mechanical stability of salt caverns under such operational conditions. The use of appropriate constitutive models for salt mechanics is an important step in investigating this issue, therefore many constitutive models with several parameters have been presented in the literature. However, a robust calibration strategy to reliably determine which model and parameter set represents the given rock, based on stress–strain data sets, remains an unsolved challenge. In this paper, for the first time in the community, we present a multi-step strategy to determine a single parameter set based on many deformation data sets for salt rocks. Towards this end, we first develop a comprehensive constitutive model able to capture all relevant nonlinear deformation physics of transient, reverse, and steady-state creep. The determination of the single set of representative material parameters is then achieved by framing the calibration process as an optimization problem, for which the global Particle Swarm Optimization algorithm is employed. To allow for dynamic data integration, a multi-step calibration strategy is developed for a situation where experiments are included one at a time, as they become available. Additionally, due to the existing mild heterogeneity in the experimental rock samples, our optimization strategy is made flexible to allow for this slight heterogeneity. The devised optimization strategy, based on the multi-physics comprehensive constitutive modeling framework, results in a single set of representative material properties of all the deformation data sets. As a rigorous mathematical analysis for the presented method and the lack of relevant experimental data sets, we consider a wide range of synthetic experimental data sets, inspired by the existing sparse relevant data in the literature. The results of our performance analyses show that the proposed calibration strategy is robust. Moreover, the results become increasingly more accurate as more data sets become available.
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来源期刊
CiteScore
14.00
自引率
5.60%
发文量
196
审稿时长
18 weeks
期刊介绍: The International Journal of Rock Mechanics and Mining Sciences focuses on original research, new developments, site measurements, and case studies within the fields of rock mechanics and rock engineering. Serving as an international platform, it showcases high-quality papers addressing rock mechanics and the application of its principles and techniques in mining and civil engineering projects situated on or within rock masses. These projects encompass a wide range, including slopes, open-pit mines, quarries, shafts, tunnels, caverns, underground mines, metro systems, dams, hydro-electric stations, geothermal energy, petroleum engineering, and radioactive waste disposal. The journal welcomes submissions on various topics, with particular interest in theoretical advancements, analytical and numerical methods, rock testing, site investigation, and case studies.
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