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首页> 外文期刊>Applied Mathematical Modelling >Dynamic characteristics analysis of a rotor-stator system under different rubbing forms
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Dynamic characteristics analysis of a rotor-stator system under different rubbing forms

机译：不同摩擦形式下的转子-定子系统动力学特性分析

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摘要

Dynamic characteristics of a rotor rubbing with circular stator and four pin shape stators are studied based on contact dynamics theory. Based on finite element (FE) method, the rotor system attached with two disks and pin shape stators are simulated by Timoshenko beam. The circular stator is simulated by a lumped mass model, and the rotor and stator are connected by one or more point-point contact elements to establish the dynamic model of the rotor-stator coupling system. Assuming that the rubbing is caused by the sudden impact excitation and sudden unbalance excitation under two loading conditions (condition 1: in-phase unbalances of two disks at the first critical speed, condition 2: out-of-phase unbalances of two disks at the second critical speed), the system dynamic characteristics are analyzed by the time-domain waveform, rotor orbit, normal contact/rubbing force and stator acceleration. The results show that the rubbing caused by the sudden impact under the loading condition 2 will always exist and the rubbing will excite quasi-periodic motion of the rotor system; combination frequency components about the rotating frequency (1 ×) and the first lateral natural frequency of the rotor-stator coupling system (f_(n1)) can be viewed as the most distinguishable characteristic. Full annular rubbing may appear due to the sudden unbalance excitation under the loading condition 1, the four-point rubbing can restrain the subsynchronous vibration and mainly excites odd multiple frequency components, such as 3× and 5×.
机译：基于接触动力学理论，研究了带有圆形定子和四个销形定子的转子的动力学特性。基于有限元（FE）方法，通过蒂莫申科梁对带有两个圆盘和销形定子的转子系统进行了仿真。通过集总模型对圆形定子进行仿真，并通过一个或多个点-点接触元件将转子和定子连接起来，以建立转子-定子耦合系统的动力学模型。假设摩擦是由于在两个载荷条件下的突然冲击激励和突然的不平衡激励引起的（条件1：在第一临界速度下两个磁盘的同相不平衡，条件2：在两个临界条件下两个磁盘的异相不平衡）。第二临界速度），通过时域波形，转子轨道，法向接触/摩擦力和定子加速度来分析系统动态特性。结果表明，在载荷条件2下，突然冲击所引起的摩擦将一直存在，并且会引起转子系统的准周期运动。可以将转子-定子耦合系统的旋转频率（1×）和第一横向固有频率（f_（n1））的组合频率分量视为最明显的特征。在载荷条件1下，突然的不平衡激励可能会引起全环形摩擦，四点摩擦可以抑制次同步振动，并且主要激发奇数倍频分量，例如3x和5x。

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  • 来源
    《Applied Mathematical Modelling》 |2015年第8期|2392-2408|共17页
  • 作者

    Hui Ma; Qianbin Zhao; Xueyan Zhao; Qingkai Han; Bangchun Wen;

  • 作者单位

    School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, PR China;

    School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, PR China;

    Department of Automatic Control and Systems Engineering, University of Sheffield, Mappin Street, Sheffield, South Yorkshire S1 3JD, UK;

    School of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, PR China;

    School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rubbing; Finite element; Rotor system; Dynamic characteristic; Combination frequency components;

    机译：擦;有限元;转子系统;动态特性组合频率分量;

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