人工冻土蠕变非定常开尔文模型  

Non- stationary Kelvin Model of Artificial Frozen Soil Creep

作　　者：毛芬[1] 姚兆明[1] 

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2014年第2期13-16,共4页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(40972188/DO214);安徽省博士后基金资助项目

摘　　要：为了更好地描述人工冻土的蠕变特性,将广义开尔文模型中的经典Newton黏壶中的黏滞系数定义为与时间有关的非定常参数,通过推算得到非定常开尔文模型,用粒子群优化算法识别模型中的参数。非定常开尔文模型能模拟不同应力下的蠕变试验数据,效果都很好,充分说明了该模型的合理性。目前采用非定常开尔文模型来研究人工冻土的蠕变规律的很少,此方法的提出为人工冻土领域的计算开辟了新思路。In order to better describe the characteristics of creep ,the viscosity coefficient in the classical Newton clay pot was defined as a non -stationary parameter related with time , then the non-stationary Kelvin model can be obtained by reckoning .At last, through Particle Swarm Optimization algorithm the parameters of the model can be obtained .Using the non-stationary Kelvin model the creep test data in different stress can be simulated , and the result is very good , so it can fully illustrates the rationality of the model .At present , to research the creep law of artificial frozen soil using the non -stationary Kelvin model is rare .Therefore , the proposed method opens up new ideas for the calculation of artificial frozen soil area .

关 键 词：人工冻土 蠕变特性 非定常开尔文模型 

分 类 号：TU445[建筑科学—岩土工程]