摘要
现有的沥青混合料本构模型参数辨识方法主要是对试验数据图进行分析,结合本构模型公式得到材料参数。这种方法主观性强,精度差。文章以Burgers模型为例,通过引入了基于不等距节点的二次B样条对试验数据序列进行筛选,采用非线性最小二乘L-M方法对沥青混合料本构模型进行拟合,得到了精度较高的模型参数。
The existing identifying parameters of constitutive model for asphalt mixture is mainly to determine the parameters of materials through the analysis on the test results,in combination with computation from the formula in the constitutive model.This method is strong in subjectivity,but poor in accuracy.Based on the case of Burgers model,the parameters with high accuracy were obtained by introducing the quadratic B-spline with unequal interval joints to screen the subsequence of test data,and fit the constitutive model for asphalt mixtures with the nonlinear method.
出处
《内蒙古公路与运输》
2007年第3期24-27,共4页
Highways & Transportation in Inner Mongolia
关键词
二次B样条
L-M法
本构模型
参数
quadratic B spline
Levenberg-Marguardt(L-M) method of minimum squares
constitutive model
parameters
