摘要
为了更明确地描述软岩蠕变过程与稳定性的对应关系;采用微分方程描述方法,建立了软岩全程应力应变过程中的非线性蠕变模型,分析了软岩的蠕变过程和对应阶段的稳定性,讨论了蠕变过程中模型参数的变化规律及其对应的稳定性;在不同的应力水平下,对应不同的蠕变过程。广义弹性摸量小于零时,对应第三阶段蠕变。在第二、三阶段蠕变,系统状态均是非稳定的。利用软岩在第三阶段蠕变的对应加速蠕变特性,可为预测、预报系统的失稳现象提供理论依据。
In order to describe the relation between the creep process and the stability of the weak rock, the nonlinear creep model is built in the whole stress and strain process of the weak rock, the creep process and stability in the corresponding moment are analysed and the change rule of the model parameters in the creep process and the corresponding stability is discussed in the paper with differential equaltion method. There are different creep processes in the different stress. The third moment creep will occur when the generalized elastic modulus is less than zero. The system state is unsteady in the second and the third moment creep. Using the corresponding accelerated creep character of the weak rock, it can offer the theoretical basis in order to forecast and predict the instable phenomena of the system.
出处
《辽宁工程技术大学学报（自然科学版）》
EI
CAS
北大核心
2006年第5期680-682,共3页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金重点资助项目(504334020)
面上项目(50374042)
辽宁省科学技术基金资助项目(20022155)
教育厅重大基础研究资助项目(202182055)
关键词
软岩
非线性
蠕变
稳定性
蠕变失稳
weak rock
nonlinear
creep
stability
creep instability
