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首页> 外文期刊>Arabian Journal for Science and Engineering >Computational Tradeoff in Modal Characteristics of Complex Rotor Systems Using FEM
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Computational Tradeoff in Modal Characteristics of Complex Rotor Systems Using FEM

机译：基于有限元的复杂转子系统模态特性计算折衷

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摘要

Modal analysis of complex rotor-bearing systems using the finite element method (FEM) may become controversial when considering the tradeoff between geometric complexity and elastodynamic integrity of the FEM model. In this paper, the modal characteristics of an actual multi-impeller rotor-bearing system with complicated geometry are estimated and verified using two modeling schemes. The first scheme invokes a developed finite element elastodynamic model that accounts for gyroscopic effects, torsional-bending inertia coupling, internal material damping, shear and anisotropic bearings. In this model, the intricate details of the impeller were ignored, and only the inertial properties of the impeller disk are considered. The second scheme employs a general-purpose finite element code, wherein the complicated impeller geometry is included in lieu of ignoring some of the rotational effects and inertia coupling effects. The obtained results shed the light on the tradeoffs involved in modal analysis of complicated rotor systems using the FEM. Comparisons with experimental values showed that the first scheme, which adopts simplified impeller geometry while accounting for all the rotational effects is more accurate in estimating the modal characteristics of such complex rotor-bearing systems.
机译：当考虑有限元模型的几何复杂度和弹性动力学完整性之间的折衷时，使用有限元方法（FEM）对复杂的转子轴承系统进行模态分析可能会引起争议。在本文中，使用两种建模方案估算并验证了实际的具有复杂几何形状的多叶轮转子轴承系统的模态特性。第一种方案调用了已开发的有限元弹性动力学模型，该模型考虑了陀螺效应，扭转弯曲惯性耦合，内部材料阻尼，剪切和各向异性轴承。在该模型中，忽略了叶轮的复杂细节，仅考虑了叶轮盘的惯性。第二方案采用通用的有限元代码，其中包括复杂的叶轮几何形状来代替忽略一些旋转效果和惯性耦合效果。所获得的结果揭示了使用有限元法对复杂转子系统进行模态分析所需要的取舍。与实验值的比较表明，第一种方案采用简化的叶轮几何形状，同时考虑所有旋转效应，在估算这种复杂的转子轴承系统的模态特性时更为准确。

著录项

  • 来源
    《Arabian Journal for Science and Engineering》 |2012年第6期|p.1653-1664|共12页
  • 作者

    Y. A. Khulief; F. A. Al-Sulaiman; A. Arif; R. Ben-Mansour; A. Al-Qutub; M. Anis;

  • 作者单位

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, KFUPM, Box 1767, Dhahran 31261, Saudi Arabia;

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

    rotordynamics; modal characteristics; finite element; pumps; vane-passing frequency;

    机译：转子动力学模态特征有限元;泵;叶片通过频率;

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