摘要
传统宾汉姆流变模型不适于描述岩石蠕变的非线性衰减和加速阶段.本文提出一种非线性的改进模型,引入作用函数表征衰减蠕变阶段,引入非线性黏性元件与传统模型串联表征岩石的加速蠕变阶段.通过对绿片岩和砂岩蠕变实验数据进行非线性拟合得到模型参数,与实验曲线的对比分析表明了改进的效果及改进模型的合理性.
The nonlinear attenuation and acceleration creep stage of the rock cannot be well described by the traditional Bingham rheological model,which is valid in the stable stage.So,an action function and a nonlinear viscous element are added to characterize the two stages,which transform the traditional linear formulation into a nonlinear one,in the form of an improved Bingham model.The green rock and sandstone creep experimental data are obtained by rheological tests and the parameters of the model are obtained by a nonlinearˉtting method.Compared the theoretical curves with the experimental curves,the results show that the improved model is e?ective and rational.
作者
张亮亮
王晓健
ZHANG Liangliang;WANG Xiaojian(School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232000, Anhui, China)
出处
《力学与实践》
北大核心
2017年第6期602-605,共4页
Mechanics in Engineering
基金
国家自然科学基金(51374010
51474004)
2016级硕士研究生创新基金(2017CX2076)资助项目
