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    软岩遇水软化的耗散结构形成机制

    朱凤贤 周翠英

    朱凤贤, 周翠英, 2009. 软岩遇水软化的耗散结构形成机制. 地球科学, 34(3): 525-532.
    引用本文: 朱凤贤, 周翠英, 2009. 软岩遇水软化的耗散结构形成机制. 地球科学, 34(3): 525-532.
    ZHU Feng-xian, ZHOU Cui-ying, 2009. Forming Mechanism of Dissipative Structure in the Softening Process of Saturated Soft Rocks. Earth Science, 34(3): 525-532.
    Citation: ZHU Feng-xian, ZHOU Cui-ying, 2009. Forming Mechanism of Dissipative Structure in the Softening Process of Saturated Soft Rocks. Earth Science, 34(3): 525-532.

    软岩遇水软化的耗散结构形成机制

    基金项目: 

    中国高技术研究发展计划 2007AA11Z112

    国家自然科学基金项目 59809008

    国家自然科学基金项目 40672194

    高等学校博士学科点基金项目 20060558060

    广东省自然科学基金重点项目 013188

    广东省自然科学基金重点项目 06104932

    详细信息
      作者简介:

      朱凤贤(1982-), 男, 博士生, 主要从事岩土工程与信息技术学习与研究工作

      通讯作者:

      周翠英, E-mail: ueit@mail.sysu.edu.cn

    • 中图分类号: P641

    Forming Mechanism of Dissipative Structure in the Softening Process of Saturated Soft Rocks

    • 摘要: 针对华南“红层”软岩遇水软化的复杂系统演化问题, 从其软化过程中是否形成耗散结构的思路出发, 研究了软岩系统非线性软化特征.结果表明: 软岩与水相互作用系统是一个开放的复杂系统, 在内部非线性作用下逐渐演化至非平衡状态, 其软化过程中可以形成有序的耗散结构.在此基础上, 采用耗散结构理论系统分析了软岩软化过程中耗散结构的形成机制: 软岩软化的过程经历了近平衡态、远离平衡自组织态与远离平衡临界态3个阶段, 并最终通过非平衡相变形成了具有一定稳定性的耗散结构.最后基于软岩软化过程中结构分维值演化规律, 初步建立了软岩耗散结构形成的分岔演化模型, 并将模型应用于软岩饱水软化试验的临界分岔现象分析中.分析表明软岩耗散结构是在系统经历多次倍周期分岔, 通过不断地从稳定到失稳再到稳定的过程后形成的.其中3个月与6个月这两个时间点具有显著的临界特征, 这是深入研究软岩软化耗散动力学过程的切入点.

       

    • 图  1  软岩在不同饱水时间作用后孔隙分维变化规律

      Fig.  1.  Variation of pore fractal dimension with saturation times

      图  2  软岩物理、力学性质与水溶液浓度的变化规律

      Fig.  2.  Variation regularity chart of physical and mechanical properties of soft rocks and concentration of aqueous solution

      图  3  非平衡相变过程示意图

      Fig.  3.  Sketch map of non-equilibrium phase transition

      图  4  Logistic离散动力演化系统的迭代过程(谢应齐和曹杰,1995)

      Fig.  4.  Iterative process of Logistic discrete dynamic system

      图  5  Logistic系统演化的分岔行为(谢应齐和曹杰,1995)

      Fig.  5.  Bifurcation behavior of Logistic system evolution

      图  6  软岩饱水过程中系统分岔演化规律

      Fig.  6.  Evolution regularity of soft rocks-water system during saturation process

      表  1  不同饱水时间下软岩相关参数

      Table  1.   Parameter table of soft rocks in different saturation times

      表  2  Logistic方程指标计算结果

      Table  2.   Calculation results of Logistic equation index

      表  3  动力学参数随时间的内插值

      Table  3.   Interpolation data of dynamic parameters with time

      表  4  饱水3个月与6个月时间点临界特征

      Table  4.   Critical characteristics after 3 and 6 months saturation

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    • 收稿日期:  2008-12-01
    • 刊出日期:  2009-05-25

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