中文摘要：

为了更好地实现对岩石蠕变特性的描述,基于岩石蠕变的阶段特征,提出分段模拟岩石蠕变的建模思路。应用变分数阶微积分改进的软体元件与弹簧串联得到改进的Maxwell模型实现对岩石稳定蠕变阶段的模拟;同时基于应变触发方式改进蠕变体元件实现对岩石非稳定蠕变阶段的模拟。综合改进的Maxwell模型与改进的蠕变体元件构建一个新的三元件蠕变模型。应用岩盐典型蠕变曲线数据对三元件蠕变模型进行了验证。结果显示构建的三元件蠕变模型可以很好地模拟岩盐的三阶段蠕变,分段模拟思路是可靠的。

英文摘要：

In order to achieve a better description of rock creep behaviour, the model creating idea of piecewise simulation of rock creep is proposed on the basis of phase characteristics. The improved Maxwell model, which is composed of an improved soft-matter element based on variable order fractional calculus and a spring element, is used to achieve the simulation of rock steady creep phase. Based on the way of strain trigger, an improved creep body element is used to achieve the simulation of rock unsteady creep phase. Combining the improved Maxwell model and the improved creep body element, a new three-element creep model is proposed. The creep model is verified by using the typical creep curve data of rock salt. The results show that the three-element creep model proposed can be used to perfectly simulate the three phases of rock salt creep, and the idea of piecewise simulation is reliable.