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中南大学学报(自然科学版)

Journal of Central South University

第40卷    第2期    总第186期    2009年4月

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文章编号:1672-7207(2009)02-0429-07
四辊轧机辊系的横向自由振动
孙建亮1,彭 艳1,刘宏民1,江光彪2

(1. 轧制设备及成套技术教育部工程研究中心,亚稳材料制备技术与科学国家重点实验室, 燕山大学,河北 秦皇岛,066004; 2. 宝山钢铁集团有限公司,上海,200941)

摘 要: 为研究轧机辊系沿辊身长度方向的振动特性及其对板带材板形质量的影响,以四辊轧机为研究对象,将工作辊和支撑辊看作弹性连续体,辊间接触认为是Winkler弹性基础,建立轧机辊系的横向振动模型。根据 欧拉-伯努力梁理论,采用模态叠加法对轧机辊系自由振动耦合方程进行求解,得到四辊轧机辊系横向振动的自然频率、主振型和振动方程。对宝钢2030冷轧机组进行数值模拟,分析其辊系横向振动特性。研究结果表明:四辊轧机辊系横向振动包括2个无限序列的自然频率ω1n和ω2n;辊系横向自由振动由2种振动模式组成,即低频的同步振动和高频的异步振动;辊系横向振动中模式 起主要作用,低阶时工作辊的振动比支承辊的振动剧烈;高阶时支承辊振幅大于工作辊振幅,奇数阶振幅大于偶数阶振幅;轧辊横向振动对带材板形质量有重要影响。关键词:四辊轧机;辊系横向自由振动;模态叠加法

 

关键词: 四辊轧机;辊系横向自由振动;模态叠加法

Free transverse vibration of rolls for four-high mill
SUN Jian-liang1, PENG Yan1, LIU Hong-min1, JIANG Guang-biao2

1. Engineering Research Center of Rolling Equipment and Complete Technology of Ministry of Education, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China; 2 Hot Rolling Mill of Baoshan Iron and Steel Co. Ltd., Shanghai 200941, China

Abstract:In order to study the transverse vibration of rolls for four-high mill and its effect on the strip shape, the free transverse vibration model of rolls for four-high mill was built. The work roll and backup roll were considered as elastic continuous bodies and the work roll and backup roll were joined by a Winkler elastic layer. According to Euler-Bernoulli beam theory, the coupled equations of free transverse vibration of rolls were solved based on modal superposition method. The numerical modeling was made on 2030 cold tandem mill of Baoshan Iron and Steel Company. The free transverse vibration characteristics of rolls were analyzed, and the natural frequency, principal mode and motion equations were determined. The results show that the free transverse vibration of rolls includes two kinds of vibration modes which are the synchronous vibration at low frequencies ω1n and the asynchronous vibration at high frequencies ω2n. The sequence n=1 plays more important role in the free transverse vibration of rolls. The vibration amplitude of work roll is bigger than that of the backup roll in low order, and it is reverse in high order. The vibration amplitude of odd-order is bigger than that of the even-order. The transverse vibration of rolls for four-high mill has important effect on the strip shape.

 

Key words: four-high mill; free transverse vibration of rolls; modal superposition method

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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