关于粘弹模型中滞回圈的讨论

Discussion of Delayed Curve about Soil Viscoelasticity Model

运用数学方法对土动力学中的粘弹模型进行了求解。从解的结构看,动应变由两部分组成:一项呈指数衰减,另一项为三角函数。计算结果同时表明粘弹模型滞回圈并非严格意义上的椭圆,而是一条由原点出发逐渐向某一椭圆靠拢的曲线,同时认为可以利用该曲线前四分之一周期部分来确定骨干曲线。

The solution to viscoelasticity model of soil under dynamic stress was found. The structure of the solution shows that the dynamic strain curve of soil under dynamic stress consists of two parts. One is attenuation curve of an exponential function and the other is trigonometric function curve. At the same time, the result expatiates that the delayed curve of soil viscoelasticity model is not an absolute ellipse but a curve starting from original point,and gradually closing up to an ellipse.