岩石蠕变试验非定常参数流变模型及计算机仿真  

Rheological Model with Non-constant Parameters and Computer Simulation of Creep Experiment of Rock

作　　者：李德建[1,2] 饶远昊 张鸣原 杨珂 张京 LI Dejian;RAO Yuanhao;ZHANG Mingyuan;YANG Ke;ZHANG Jing(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Mechanic and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Urban Water and Engineering Research Branch,China Academy of Urban Planning and Design,Beijing 100037,China)

机构地区：[1]中国矿业大学(北京),深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京),力学与建筑工程学院,北京100083 [3]中国城市规划设计研究院,城镇水务与工程研究分院,北京100037

出　　处：《应用基础与工程科学学报》2022年第6期1522-1533,共12页Journal of Basic Science and Engineering

基　　金：国家重点研发计划项目(2016YFC0600901);中央高校基本科研业务费专项(2010YL14);国家自然科学基金项目(41572334,11572344)

摘　　要：利用砂岩分级加卸载蠕变试验数据,分析了岩石力学性质参数随应力水平及时间的变化规律,将非定常元件引入Burgers模型,用于描述分级加卸载蠕变试验过程.基于Matlab/Simulink平台建立了非定常参数的仿真流变模型,并根据试验方案配置仿真环境,对分级加卸载蠕变试验的全过程进行了计算机仿真模拟.结果表明:建立的非定常参数Matlab/Simulink流变模型能够描述分级加卸载蠕变试验过程中岩石的蠕变阶段、常速率应力作用下的加卸载阶段以及表示弹性后效的变形恢复阶段.Based on the data of step loading and unloading creep experiments of sandstone,the variation law of mechanical property parameters with stress level and time is analyzed.To describe the creep experiment process under stage loading and unloading,the non-constant elements are introduced into the Burgers model.The simulation rheological model is constructed based on Matlab/Simulink platform.The simulation environment is configured according to the experimental scheme to simulate the whole process of a series of step loading and unloading creep experiments.The significance of the model can describe the creeping stage,the loading and unloading stage under constant rate stress,and the deformation recovery stage of the elastic aftereffect.

关 键 词：蠕变试验 分级加卸载 流变模型 变形恢复 非定常参数 MATLAB/SIMULINK 

分 类 号：TU45[建筑科学—岩土工程]