基于循环迭代法的牵伸区纤维运动仿真模拟  

Simulation of fiber motion in drafting zone based on cyclic iterative method

作　　者：崔月敏 程隆棣[1] 和杉杉 吕金丹 崔益怀 CUI Yuemin;CHENG Longdi;HE Shanshan;LÜ Jindan;CUI Yihuai(College of Textiles,Donghua University,Shanghai 201620,China;College of Textiles,Zhejiang Fashion Institute of Technology,Ningbo,Zhejiang315211,China;Nantong Double Great Textile Co.,Ltd.,Nantong,Jiangsu 226600,China)

机构地区：[1]东华大学纺织学院,上海201620 [2]浙江纺织服装职业技术学院纺织学院,浙江宁波315211 [3]南通双弘纺织有限公司,江苏南通226600

出　　处：《纺织学报》2023年第2期76-82,共7页Journal of Textile Research

基　　金：上海市“科技创新行动计划”扬帆计划项目(21YF1401100);国家重点研发计划重点专项(2017YFB0309100);东华大学中央高校基本科研业务费专项资金自由探索项目(2232021D-09)。

摘　　要：为进一步研究牵伸区纤维的运动,基于单纤维在牵伸区内受到的引导力与控制力,采用循环迭代法建立纤维变速模型,计算牵伸区不同压力分布下不同长度纤维的变速点,并得到牵伸区内纤维变速点分布以及各位置不同纤维(包括快速纤维、慢速纤维以及浮游纤维)的分布。结果表明:纤维的变速点位置与其自身长度有关,纤维长度越长,其变速点越靠近前罗拉钳口;在不考虑浮游区情况下,对于长度离散度较大的纤维须条,牵伸区内平稳、缓和的压力分布有利于纤维变速点的集中,但纤维变速点离前钳口较远;纤维长度长、离散度较小时,靠近前钳口增加附加压力有利于变速点的集中且其更加靠近前钳口。Objective The dispersion of fiber accelerated points during drafting is one of the main causes for yarn unevenness.Most of the previous studies are about accelerated point distributions of all fibers in a sliver,and there is a lack of research on the motion of single fibers.Therefore,based on the force of a single fiber in the drafting zone,a fiber motion model is established in this research,and the theoretical accelerated points of fibers under different pressure distributions are discussed,which may provide theoretical basis for process design in actual production.Method Ignoring the difference of the pressure distribution in the transverse direction of a sliver,a drafting model,using software MatLab,was established according to the controlling force and guiding force of a single fiber in the drafting zone,and the position where the fiber is accelerated was determined.In the simulation,it is assumed that all fibers are accelerated at the front roller nip,and then the accelerated points of each fiber is calculated repeatedly by the iterative method,until the difference from the result of the last loop is less than a set error value.Results The maximum absolute values of errors between the calculated results and the verification results in the opposite direction were all much smaller than the error value,which validates the model.The accelerated point of a fiber was related to its length(Fig.7).The longer the fiber,the closer the fiber accelerated point is to the front roller nip.When the additional pressure was added close to the back roller,the accelerated point of the fiber with a length of less than 27 mm would move slightly backward compared to the case without the additional pressure.For a fiber longer than 27 mm,the accelerated point of the fiber moved rapidly towards the front roller nip as the length increases.As the position for adding additional pressure was moved forward,the accelerated points for shorter fibers also got closer to the front roller.When the additional pressure was added closer to the

关 键 词：纤维变速点 循环迭代法 仿真 牵伸 压力分布 纤维运动模型 

分 类 号：TS104.1[轻工技术与工程—纺织工程]