改进的非定常Maxwell岩石蠕变模型及参数识别
TU45; 针对传统蠕变模型难以反映岩石加速蠕变阶段特征的问题,为了全面提升岩石蠕变3个阶段的准确描述,在传统Maxwell模型的基础上,充分考虑原有黏壶元件蠕变参数的非定常化的同时,串联一个非线性黏塑性元件,提出了一种改进的非定常Maxwell蠕变模型,并推导出相应蠕变本构方程.同时运用origin软件引入不同蠕变数据进行拟合,研究结果表明,该蠕变本构模型能够对岩石蠕变试验曲线进行较好拟合及参数辨识,能够较好模拟不同应力水平下岩石蠕变变形特征,准确反应岩石蠕变全过程的非线性蠕变特征,表明新建立的蠕变本构模型具有较强的适用性与正确性.为今后的岩土工程提供了一种新的蠕变本构模型....
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| Published in | 中国农村水利水电 no. 1; pp. 221 - 226 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西华大学 流体机械及工程四川省重点实验室,四川 成都 610039
15.01.2025
西华大学能源与动力工程学院,四川 成都 610039 西华大学 流体及动力机械教育部重点实验室,四川 成都 610039 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-2284 |
| DOI | 10.12396/znsd.240626 |
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| Abstract | TU45; 针对传统蠕变模型难以反映岩石加速蠕变阶段特征的问题,为了全面提升岩石蠕变3个阶段的准确描述,在传统Maxwell模型的基础上,充分考虑原有黏壶元件蠕变参数的非定常化的同时,串联一个非线性黏塑性元件,提出了一种改进的非定常Maxwell蠕变模型,并推导出相应蠕变本构方程.同时运用origin软件引入不同蠕变数据进行拟合,研究结果表明,该蠕变本构模型能够对岩石蠕变试验曲线进行较好拟合及参数辨识,能够较好模拟不同应力水平下岩石蠕变变形特征,准确反应岩石蠕变全过程的非线性蠕变特征,表明新建立的蠕变本构模型具有较强的适用性与正确性.为今后的岩土工程提供了一种新的蠕变本构模型. |
|---|---|
| AbstractList | TU45; 针对传统蠕变模型难以反映岩石加速蠕变阶段特征的问题,为了全面提升岩石蠕变3个阶段的准确描述,在传统Maxwell模型的基础上,充分考虑原有黏壶元件蠕变参数的非定常化的同时,串联一个非线性黏塑性元件,提出了一种改进的非定常Maxwell蠕变模型,并推导出相应蠕变本构方程.同时运用origin软件引入不同蠕变数据进行拟合,研究结果表明,该蠕变本构模型能够对岩石蠕变试验曲线进行较好拟合及参数辨识,能够较好模拟不同应力水平下岩石蠕变变形特征,准确反应岩石蠕变全过程的非线性蠕变特征,表明新建立的蠕变本构模型具有较强的适用性与正确性.为今后的岩土工程提供了一种新的蠕变本构模型. |
| Abstract_FL | In order to address the issue of traditional creep models failing to accurately reflect the characteristics of rock accelerated creep stage,this paper proposes an enhanced unsteady Maxwell creep model based on the conventional Maxwell model.It takes into consideration the unsteady creep parameters of original clay pot elements in series with a nonlinear viscoplastic body(NVPB),and deduces the corre-sponding creep constitutive equation.The improved model comprehensively simulates the nonlinear creep behavior throughout all stages of rock creep,thereby enhancing accurate description.Additionally,origin software is utilized for fitting different rock samples.The research findings demonstrate that this new creep constitutive model better fits the experimental data and identifies parameters,effectively simulating rock′s deformation under various stress levels while accurately describing the nonlinear creep characteristics of its three stages of creep.This indicates high accuracy and strong applicability of the newly established model.It provides a new creep constitutive model for future geotech-nical engineering. |
| Author | 刘楚佳 王悠 张旭 刘晓辉 |
| AuthorAffiliation | 西华大学能源与动力工程学院,四川 成都 610039;西华大学 流体及动力机械教育部重点实验室,四川 成都 610039;西华大学 流体机械及工程四川省重点实验室,四川 成都 610039 |
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| Author_FL | LIU Chu-jia ZHANG Xü LIU Xiao-hui WANG You |
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| DocumentTitle_FL | Improved Unsteady Maxwell Rock Creep Model and Parameter Identificatio |
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| Keywords | 非线性 rock mechanics Maxwell model nonlinearity parameter inversion accelerated creep 岩石力学 加速蠕变 Maxwell模型 参数反演 |
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| PublicationTitle | 中国农村水利水电 |
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| Publisher | 西华大学 流体机械及工程四川省重点实验室,四川 成都 610039 西华大学能源与动力工程学院,四川 成都 610039 西华大学 流体及动力机械教育部重点实验室,四川 成都 610039 |
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| Title | 改进的非定常Maxwell岩石蠕变模型及参数识别 |
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