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首页> 外文会议>Textile Institute World Conference(83rd TIWC) vol.1; 20040523-27; Shanghai(CN) >FUNDAMENTALS OF BUNDLE FLOW DYNAMICS IN ROLL DRAFTING AND IRREGULARITIES OF BUNDLE THICKNESS
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FUNDAMENTALS OF BUNDLE FLOW DYNAMICS IN ROLL DRAFTING AND IRREGULARITIES OF BUNDLE THICKNESS

机译：轧制过程中束流动力学的基本原理和束厚度的不规则性

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摘要

Roll drafting is a fundamental unit operation attenuating the linear density of the bundle suitable to the end product. However, this operation can bring out linear density irregularity that reduces the consecutive processes efficiency and the product quality. This study aims at constructing the fiber bundle dynamics during roll drafting based on the general physical laws and simulates behavior of the bundle thickness from theoretical model. The model parameters are given from experimental adjustment. Especially, the availability of the model is tested in the steady state. Even a slight disturbance of the process conditions of fiber bundle changes the linear density of the output fiber bundle. The simulation result confirms the fluctuation of the linear density of the output bundle. For analyzing the draft dynamics, Describing Function method is applied. The theoretical model can be supposed to explain the dynamics of the fiber bundle during roll drafting so good as the reality and, thus, the mechanism of the irregularity of the fiber bundle thickness as well.
机译：辊筒牵伸是一种基本的单元操作，它会减弱适合最终产品的线束的线密度。但是，这种操作会导致线性密度不规则，从而降低了连续过程的效率和产品质量。这项研究旨在基于一般物理定律构造牵伸过程中的纤维束动力学，并从理论模型模拟纤维束厚度的行为。通过实验调整给出模型参数。特别是，模型的可用性在稳态下进行了测试。甚至对纤维束的加工条件的轻微干扰也会改变输出纤维束的线密度。仿真结果证实了输出束的线密度的波动。为了分析吃水动力学，采用了“描述函数”方法。理论模型可以被认为能够很好地解释牵伸过程中纤维束的动力学，因此也可以解释纤维束厚度不规则的机理。

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