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Finite element modeling and analysis of rotor-bearing systems.

机译：转子轴承系统的有限元建模和分析。

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摘要

In this study, a finite element dynamic model of rotor-disk-bearing system was developed using Timoshenko beam theory to incorporate shear deformation and rotary inertia. Each shaft element includes unbalance and gyroscopic effects as well as structural damping. The hydrodynamic bearing system was modeled, damping and stiffness parameters were obtained, using standard Reynolds equation solution for short bearing with half film pressure profile and Sommerfeld static eccentricity. The Reynolds equation was then solved for the case of dynamic loading for which a closed loop interaction between the shaft center position and bearing equations was derived. Lastly, the whole bearing system of equations was solved using finite series solution in rotating coordinate system that rotates at fluid circumferential velocity. With this solution the study included the effects of fluid inertia as well as dynamic eccentricity or shaft position. The study showed that bearing displacements have much slower decay rate and clearer effect of disk unbalance when dynamic eccentricity and fluid inertia are included in the closed loop rotor-bearing system.
机译：在这项研究中，利用Timoshenko梁理论，结合剪切变形和旋转惯性，建立了转子－磁盘－轴承系统的有限元动力学模型。每个轴元件都包括不平衡和陀螺效应以及结构阻尼。使用标准的Reynolds方程解，对半膜压力分布和Sommerfeld静态偏心距的短轴承，对流体动力轴承系统进行建模，获得阻尼和刚度参数。然后针对动态载荷的情况求解雷诺方程，得出轴中心位置与轴承方程之间的闭环相互作用。最后，在流体圆周速度下旋转的旋转坐标系中，使用有限级数解求解方程组的整个轴承系统。通过这种解决方案，研究包括了流体惯性以及动态偏心率或轴位置的影响。研究表明，当闭环转子-轴承系统中包括动态偏心率和流体惯性时，轴承位移的衰减速率要慢得多，并且磁盘不平衡的影响也更明显。

著录项

  • 作者

    Rabayah, Akram Awni Mohammed Hamad.;

  • 作者单位

    King Fahd University of Petroleum and Minerals (Saudi Arabia).;

  • 授予单位 King Fahd University of Petroleum and Minerals (Saudi Arabia).;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2002
  • 页码 204 p.
  • 总页数 204
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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