水合物沉积物的力学本构模型及参数离散元计算

周博; 王宏乾; 王辉; 薛世峰

doi:10.21656/1000-0887.390284

水合物沉积物的力学本构模型及参数离散元计算

doi: 10.21656/1000-0887.390284

中国石油大学(华东) 储运与建筑工程学院, 山东青岛 266580

基金项目: 国家重点研发计划（2017YFC0307604）

详细信息

作者简介:
周博（1972—），男，教授，博士，博士生导师(通讯作者. E-mail: zhoubo@upc.edu.cn);王宏乾（1993—），男，硕士生；王辉（1995—），男，硕士生;薛世峰（1963—），男，教授，博士生导师.

中图分类号: TU411
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- 文章访问数: 1594
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- 被引次数: 0
出版历程
- 收稿日期: 2018-11-12
- 修回日期: 2018-11-21
- 刊出日期: 2019-04-01

A Mechanical Constitutive Model for Hydrate-Bearing Sediments and Calculation of Material Parameters With the Discrete Element Method

College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, P.R.China

Funds: The National Key R&D Program of China（2017YFC0307604）

摘要

摘要: 为有效描述水合物沉积物在不同水合物饱和度与围压情况下的力学行为，该文基于广义Hooke(胡克)定律建立了水合物沉积物的应力应变关系方程和弹性模量弱化方程；基于三轴压缩试验确定了水合物沉积物的软化系数和软化指数，基于颗粒流程序（PFC^3D）开发了水合物沉积物初始弹性模量的离散元算法（DEM）.利用建立的应力应变关系方程、弹性模量弱化方程和初始弹性模量DEM，数值模拟了水合物沉积物在6种不同水合物饱和度与围压情况下的力学行为.数值模拟结果与三轴压缩试验结果的对比表明，建立的应力应变关系方程、弹性模量弱化方程和初始弹性模量DEM，能有效预测水合物沉积物的力学行为，可为水合物井筒设计与安全开采提供理论基础和计算方法.
- 水合物沉积物 /
- 力学本构模型 /
- 水合物饱和度 /
- 围压 /
- 离散元法
Abstract: To soundly describe the mechanical behaviors of hydrate-bearing sediments in the cases of different saturation levels of hydrate and various confining pressures, the stress-strain relation equations and elastic modulus weak-form equations for hydrate-bearing sediments were developed based on the generalized Hooke’s law. The softening coefficient and softening exponent of the hydrate-bearing sediments were determined according to the triaxial compression test results. A discrete element method (DEM) to calculate the initial elastic moduli of hydrate-bearing sediments was proposed based on the 3D particle flow code (PFC^3D). The mechanical behaviors of hydrate-bearing sediments under 6 various conditions related to saturation levels of hydrate and confining pressures, were numerically simulated with the stress-strain relation equations, elastic modulus softening equations and the DEM together. Numerical results show that， the proposed stress-strain relation equations, elastic modulus softening equations and the DEM can effectively predict the mechanical behaviors of hydrate-bearing sediments under various saturation levels of hydrate and confining pressures. The work gives a theoretical basis and a computational method for the investigations on the mechanical behaviors of hydrate boreholes and the safe exploitation of hydrate.
- hydrate-bearing sediments /
- mechanical constitutive model /
- saturation level of hydrate /
- confining pressure /
- discrete element method

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参考文献(21)

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水合物沉积物的力学本构模型及参数离散元计算

doi: 10.21656/1000-0887.390284

作者简介:
周博（1972—），男，教授，博士，博士生导师(通讯作者. E-mail: zhoubo@upc.edu.cn);王宏乾（1993—），男，硕士生；王辉（1995—），男，硕士生;薛世峰（1963—），男，教授，博士生导师.

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A Mechanical Constitutive Model for Hydrate-Bearing Sediments and Calculation of Material Parameters With the Discrete Element Method

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留言板

水合物沉积物的力学本构模型及参数离散元计算

doi: 10.21656/1000-0887.390284

作者简介: 周博（1972—），男，教授，博士，博士生导师(通讯作者. E-mail: zhoubo@upc.edu.cn);王宏乾（1993—），男，硕士生； 王辉（1995—），男，硕士生;薛世峰（1963—），男，教授，博士生导师.

计量

出版历程

A Mechanical Constitutive Model for Hydrate-Bearing Sediments and Calculation of Material Parameters With the Discrete Element Method

计量

出版历程

目录

作者简介:
周博（1972—），男，教授，博士，博士生导师(通讯作者. E-mail: zhoubo@upc.edu.cn);王宏乾（1993—），男，硕士生；王辉（1995—），男，硕士生;薛世峰（1963—），男，教授，博士生导师.