作　　者： ; ; ;

机构地区： 安徽理工大学

出　　处： 《岩石力学与工程学报》 2004年第11期1895-1899,共5页

摘　　要： 在大量冻土蠕变试验的基础上,用等时曲线近似方法确定了冻土的屈服极限,建立了多种粘弹性和粘弹塑性流变模型,采用非线性最小二乘法反演了冻土流变参数,并基于简单性和精确性原则,建立了冻土模糊优选模型。模糊评判结果表明,在较低应力下Burgers模型是最优模型,在较高应力下村山朔郎模型为最优模型。 Based on frozen soil creep tests, yield stress limit is approximately determined by means of experimental tautochrone at first. Then several visco-elastic and visco-elasto-plastic Theological models are established. The model parameter are feed back by the non-linear least square method. A fuzzy optimization model is developed under the principle of simplicity and accuracy. As a result, the optimal model is Burgers model under the lower stress level or H-H/N/S model under the higher stress level.

关 键 词： 土力学 冻土 流变模型 蠕变 参数辨识 模糊优化

领　　域： [矿业工程]