水田土壤蠕变的粘弹性计算  

Viscoelastic computation for creep test of paddy soil

作　　者：翟力欣[1] 姬长英[1] 丁启朔[1] Irshad Ali 

机构地区：[1]南京农业大学工学院,江苏南京210031

出　　处：《浙江农业学报》2010年第4期509-514,共6页Acta Agriculturae Zhejiangensis

基　　金：国家自然科学基金项目(50675107)

摘　　要：为了利用水田土壤的本构关系进行各种数值计算,结合蠕变试验中采集到的数据,采用Matlab软件的拟合工具,得到了Burgers模型的粘弹性参数;针对ANSYS有限元软件的计算要求,推导了将其转化为Pro-ny级数形式的计算公式,根据试验环境,通过试修方法建立了合适的有限元模型。通过模拟与试验结果的比较说明:利用Prony级数方法得到的计算结果与试验结果误差不大于1%。Prony级数的转化公式方法简单,计算精确。In order to apply the constitutive equations of paddy soil into numerical simulations,viscoelastic parameters of Burgers model was fitted here by Matlab software through analyzing data acquired in creep test of paddy soil.Based on the requirement of ANSYS software,an algorithm was deduced to transform the constitutive equations into Prony series.Based on the actual environment,the suitable FEM was built through the method of test.The data of simulations and experimental test was offered to evaluate the error percentage.As a result,the solution error using Prony series was no more than 1% compared with the experimental data.So,Prony series is simple and efficient.

关 键 词：水田土壤 蠕变试验 ANSYS Prony级数 

分 类 号：S152.4[农业科学—土壤学]