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Polygonal Deformation of Roll-Covering Visco-Elastic Body in Rolling Contact Systems

滚动接触系统中包覆粘弹性体的多边形变形

基本信息

批准号：
04650222
负责人：
SUEOKA Atsuo
金额：
$ 1.28万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650222/
关键词：
Pattern Formation in Rolling Contact Systems Vibration of Rotating Body Stability Cntact Vibration System with Time Lag Polygonal Deformation Vibration Characteristics of Visco-Elastic Body 時間遅れ糸

项目摘要

There exist many rotatory machine systems in which a rotor is rotating under the condition of a constant pressure between outer circumference of the rotor and the other system being in contact with the rotor. Accompanying the deformation of the structure elements of the system itself, the development of the growth process into a strong vibration is often generated in the machine so that the continuous operatin is not possible any more.The authors investigated the instability vibration generated in a rolling contact systems such as smoother roll of the paper making machine and winder system of textile machine in which a pair of rolls are in contact with each other and are rotating, and they tried to analyze the phenomenon of the polygonal deformation of the viscoelastic surface covering the roll circumfernces and to clarify the occurrence mechanism. In the basic analysis, they regard these systems as contact problem between rolls with retardation due to the viscoelastic deformation of the rubber and the elastic yarn ball, and compute the unstable regions numerically by applying the Laplace transformation and the stability analysis, and show the essential feature with respect to the polygonal deformation of roll and elastic yarn ball. The authors also conducted an experiment to identify the parameters used in the analytical model. They found from the test results that deformation recovery characteristics of the roll-covering rubber are time-dependent. The theoretical results are compared with those observed in the actual machines and the experimental apparatus, and a good agreement between them is confirmed.

存在许多旋转机械系统，其中转子在转子的外周和与转子接触的其它系统之间的恒定压力的条件下旋转。伴随着系统本身结构要素的变形，本文研究了造纸机平滑辊和纺织机卷绕系统等滚动接触系统中一对辊与辊间接触时所产生的不稳定振动并试图分析覆盖在轧辊圆周上的粘弹性表面的多边形变形现象，阐明其发生机理。在基本分析中，他们将这类系统看作是橡胶和弹性纱球的粘弹性变形引起的具有迟滞的辊间接触问题，并通过应用拉普拉斯变换和稳定性分析，对不稳定区域进行了数值计算，揭示了辊和弹性纱球的多边形变形的本质特征。作者还进行了一项实验来确定分析模型中使用的参数。他们从测试结果中发现，辊覆盖橡胶的变形恢复特性是时间依赖性的。理论结果与实际机器和实验装置中观察到的结果进行了比较，并确认它们之间的良好协议。