轧机动态刚度对液压机耦合振动的影响研究

IF 0.7 Q4 ENGINEERING, MECHANICAL
Lidong Wang, Peng Hou, Shen Wang, Chengzhen Wang, Xiaoqiang Yan, Xiaoling Wang
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引用次数: 0

摘要

热连轧的生产率和产能释放受到垂向振动的严重限制。以往关于轧机振动的研究已探究了轧制参数对垂直振动的影响,但由于建模方法的限制,尚未考虑动态刚度补偿因子对垂直振动的影响。在此,我们利用 AMESim 软件开发了带有动态刚度补偿的轧机液机耦合仿真模型。利用建立的仿真模型,研究了在下料厚度差激励频率、厚度差激励振幅、厚度差激励相位以及动态刚度补偿信号产生滞后等条件下,动态刚度补偿对轧机垂直振动的影响。可见,轧机刚度补偿对轧机垂直振动的影响随厚度激振频率的不同而不同,应根据激振频率段讨论其影响。轧辊系统振动的振幅与输入的厚度差激励基本呈线性关系,而激励相位不会影响轧机振动的频率和振幅。轧机刚度补偿信号滞后对轧机振动振幅也有很大影响。我们的研究结果将改善热轧工艺的机理,抑制垂悬振动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the effect of rolling mill dynamic stiffness on coupled vibration of hydraulic machine
The productivity and capacity release of hot-strip rolling is severely limited by pendular vibration. Previous studies on mill vibration have investigated the influence of rolling parameters on vertical vibration; however, the influence of dynamic stiffness compensation factors on vertical vibration has not yet been considered owing to the limitations of modelling methods. Herein, we develop a simulation model of mill liquid–machine coupling with dynamic stiffness compensation using AMESim software. The established simulation model is used to investigate the effect of this dynamic stiffness compensation on mill vertical vibration under conditions of downfeed thickness difference excitation frequency, thickness difference excitation amplitude, thickness difference excitation phase, and dynamic stiffness compensation signal generation hysteresis. Evidently, the impact of the mill stiffness compensation on the mill vertical vibration differs with the thickness of the excitation frequency, and the impact should be discussed according to the excitation frequency segment. The amplitudes of the roll system vibration and incoming thickness difference excitation are essentially linear, whereas the excitation phase does not affect the frequency or amplitude of the mill vibration. The rolling machine stiffness compensation signal hysteresis also has a significant impact on the mill vibration amplitude. Our findings will improve the mechanism of the hot rolling process and suppress droop vibrations.
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来源期刊
Journal of Vibroengineering
Journal of Vibroengineering 工程技术-工程:机械
CiteScore
1.70
自引率
0.00%
发文量
97
审稿时长
4.5 months
期刊介绍: Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.
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