Dynamic analysis of the single rotor-bearing system considering the comprehensive stiffness and damping

IF 1.5 4区工程技术 Q3 MECHANICS

Journal of Mechanics Pub Date : 2022-01-01 DOI:10.1093/jom/ufac022

C. Ri, RyongSik O, Qianghfu Zhao, Chunghyok Chae, Yong-Seung Sin, Yong-Seung Sin

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引用次数: 2

Abstract

The rotor system supported by the cylindrical roller bearings is widely used in various fields, such as aviation, space and machinery due to its importance. In study of the analysis of the vibration characteristics of the rotor system, it is important to accurately calculate the stiffness and damping of the cylindrical roller bearings. Therefore, in this paper, the dynamic characteristics of the simple rotor-bearing system were analyzed based on the new dynamic model of the rotor system considering the comprehensive stiffness and damping model of the cylindrical roller bearing. In consideration of the radial clearance of the cylindrical roller bearing, the radial load acting on the cylindrical roller bearing is derived and based on this, the Hertz contact stiffness model of the cylindrical roller bearing is obtained. After obtaining the oil film stiffness model of the cylindrical roller bearing according to the EHL theory, the comprehensive stiffness of the cylindrical roller bearing was calculated by combining the Hertz contact stiffness and the oil film stiffness of the cylindrical roller bearing. After a comprehensive damping model of the cylindrical roller bearing considering the radial clearance was created, a dynamic model of the simple rotor-bearing system was created based on the comprehensive stiffness and damping model of the cylindrical roller bearing. The dynamic characteristics of the simple rotor-bearing system were analyzed using the MATLAB program. The amplitude of the simple rotor-bearing system considering the comprehensive stiffness and damping was reduced by 18.2% compared to the case where it was not considered. This shows that the structure of the cylindrical roller bearing has a restraining effect on the unbalanced response of the rotor system.

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考虑综合刚度和阻尼的单转子-轴承系统动力学分析

圆柱滚子轴承支承的转子系统由于其重要性而广泛应用于航空、航天、机械等各个领域。在研究转子系统的振动特性分析时，准确计算圆柱滚子轴承的刚度和阻尼是很重要的。因此，本文基于考虑圆柱滚子轴承的综合刚度和阻尼模型的转子系统新动力学模型，对简单转子-轴承系统的动态特性进行了分析。考虑圆柱滚子轴承的径向游隙，推导了作用在圆柱滚子轴承上的径向载荷，并在此基础上得到了圆柱滚子轴承的赫兹接触刚度模型。根据EHL理论得到圆柱滚子轴承的油膜刚度模型后，结合圆柱滚子轴承的赫兹接触刚度和油膜刚度计算圆柱滚子轴承的综合刚度。在建立考虑径向游隙的圆柱滚子轴承综合阻尼模型后，基于圆柱滚子轴承的综合刚度和阻尼模型，建立了简单转子-轴承系统的动力学模型。利用MATLAB程序对简单转子-轴承系统的动态特性进行了分析。与不考虑综合刚度和阻尼的情况相比，考虑综合刚度和阻尼的简单转子-轴承系统的幅值减小了18.2%。这表明圆柱滚子轴承的结构对转子系统的不平衡响应有抑制作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Mechanics 物理-力学

CiteScore

3.20

自引率

11.80%

发文量

审稿时长

6 months

期刊介绍： The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.