根据实测曲线，对建立的线性三元件模型进行参数拟合。
Based on the experimental curve, parameters are fitted for an established linear three elements mechanical model.
三元件模型能较好地模拟PTT纤维和PET纤维的应力松弛过程。
The relaxations of stress of PTT fibre and PET fibre may be simulated by using a three-element mechanical model.
在此基础上，用类似粘弹性三元件固体模型的形式去拟合离散的数值结果，得到了松弛模量更简单的解析表达式。
On base of those, effective relaxation moduli could be curve-fitted by the function form of the three-parameter solid model.
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