A non-linear creep constitutive model for salt rock based on fractional derivatives

A non-linear creep constitutive model for salt rock based on fractional derivatives
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基于分数阶导数的盐岩非线性蠕变本构模型

DOI:
10.2298/tsci180510092c
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发表时间:
2019
期刊:
影响因子:
1.7
通讯作者:
Liu Wei
Liu Wei
中科院分区:
工程技术4区
文献类型:
--
作者:
Chen Jie;Lu Dan;Wu Fei;Fan Jinyang;Liu Wei

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盐岩的蠕变特性是决定深层地下储能库能否长期运行的重要因素。从分数阶导数出发,在Abel阻尼器的基础上提出了超Abel阻尼器的概念。在西原模型的基础上,引入超阿贝尔阻尼器的非线性单元,建立了一种新的盐岩蠕变本构模型。推导了该模型的理论解析解。对试验数据的拟合分析表明,该模型能较好地反映蠕变全过程曲线,特别是非线性加速蠕变阶段。
The creep property of the salt rock is an important determinant of deep underground repository of energy storage for long-term operatio. Starting from fractional derivative, this paper proposes a new concept of super Abel dashpot based on Abel dashpot. According to the Nishihara model, the non-linear element of super Abel dashpot is introduced, and a new salt rock creep constitutive model is established. The theoretical analytic solution of this model is then deduced. Fitting analysis of the experimental data indicates that the model can well reflect the whole-process creep curve, especially the non-linear accelerated creep stage.
盐岩非线性蠕变损伤模型
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