摘要
针对传统整数阶微积分本构关系所需元件多等不足,将分数阶微积分关系运用到人工冻土蠕变计算中。在元件模型基础上,引入分数阶导数,建立稳定蠕变分数阶导数定常蠕变模型。运用粒子群优化方法,通过对不同加载应力下稳态蠕变试验数据建立的蠕变模型参数进行识别,得到蠕变模型的材料参数。通过对比分数阶导数蠕变模型计算值与试验结果,发现分数阶导数蠕变模型能很好地模拟人工冻土的蠕变规律。分数阶导数模型是人工冻土领域计算的一种新方法。
As the traditional integer order calculus constitutive relation required too many elements and other disadvan- tages, to apply creep calculation of artificial frozen soil with fractional order calculus relation. Based on the element model, introduced the fractional derivative, to establish the stable creep fractional derivative steady creep model. Using the particle swarm optimization method, through the steady-state creep test data under different load stress, for the creep model parameters identification that established, get the material parameters of creep model. By comparing the experimental results and the calculation of fractional derivative creep model, found that the fractional derivative creep model can simulate the creep law of artificial frozen soil very well. Fractional derivative model is a new calculation method in the field of artificial frozen soil.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第10期1763-1768,共6页
Journal of China Coal Society
基金
国家自然科学基金资助项目(40972188
41301074)
安徽省博士后基金资助项目
关键词
人工冻土蠕变
粒子群
分数阶导数
KELVIN模型
artificial frozen soil creep
particle swarm
fractional order derivative
Kelvin model
作者简介
陈军浩（1986-），男，福建福州人，博士研究生。Tel：0554—6668532，E—mail：aldejhl23@163．com
