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首页> 外文期刊>Mechanical systems and signal processing >Effect of bearing preloads on the modal characteristics of a shaft-bearing assembly: Experiments on double row angular contact ball bearings
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Effect of bearing preloads on the modal characteristics of a shaft-bearing assembly: Experiments on double row angular contact ball bearings

机译：轴承预紧力对轴承组合模态特性的影响：双列角接触球轴承的实验

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摘要

This article investigates the role of bearing preloads on the modal characteristics of a shaft-bearing assembly with a double row angular contact ball bearing. First, an analytical model is developed to comparatively evaluate the effects of axial bearing preloads on the vibratory responses of alternate double row configurations. The analytical model includes bearings via a five dimensional stiffness matrix. Changes in the resonant amplitudes with respect to the bearing preloads are examined for preload-independent and preload-dependent viscous damping models. The bearing preloads significantly affect the vibration characteristics of the shaft-bearing assembly due to major changes in both diagonal and off-diagonal elements of the stiffness matrix, and such effects depend on the bearing configuration. Second, a new experiment consisting of a vehicle wheel bearing assembly with a double row angular contact ball bearing in a back-to-back arrangement is designed. The bearing is subjected to axial or radial preloads in a controlled manner. Experiments with two preloading mechanisms show that the nature and extent of the bearing preloads considerably affect the natural frequencies and resonant amplitudes, thus influencing the vibration behavior of the bearing assembly. Finally, the new bearing stiffness model is validated using measurements from the modal experiment. Suggestions for further work are briefly discussed.
机译：本文研究了轴承预紧力对带有双列角接触球轴承的轴承组合组件的模态特性的作用。首先，建立了一个分析模型来比较评估轴向轴承预紧力对交替双排结构振动响应的影响。分析模型包括通过五维刚度矩阵的轴承。对于与轴承无关的和与轴承无关的粘性阻尼模型，研究了相对于轴承轴承的共振振幅的变化。由于刚度矩阵的对角线元素和非对角线元素都发生了重大变化，因此轴承预载会显着影响轴承组合的振动特性，而这种影响取决于轴承的配置。其次，设计了一个新的实验，该实验由一个车轮轴承组件和一个背对背布置的双列角接触球轴承组成。轴承以受控方式承受轴向或径向预紧力。两种预紧机构的实验表明，轴承预紧的性质和程度会显着影响固有频率和共振振幅，从而影响轴承组件的振动性能。最后，使用模态实验的测量结果验证了新的轴承刚度模型。简要讨论了进一步工作的建议。

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  • 来源
    《Mechanical systems and signal processing》 |2012年第8期|p.176-195|共20页
  • 作者

    Aydin Gunduz; Jason T. Dreyer; Rajendra Singh;

  • 作者单位

    Acoustics and Dynamics Laboratory, Department of Mechanical and Aerospace Engineering and Smart Vehicles Concepts Center. The Ohio State University,Columbus, OH 43210, USA;

    Acoustics and Dynamics Laboratory, Department of Mechanical and Aerospace Engineering and Smart Vehicles Concepts Center. The Ohio State University,Columbus, OH 43210, USA;

    Acoustics and Dynamics Laboratory, Department of Mechanical and Aerospace Engineering and Smart Vehicles Concepts Center. The Ohio State University,Columbus, OH 43210, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    modal experiment; bearing dynamics; damping models; automotive wheel bearings;

    机译：模态实验轴承动力学;阻尼模型;汽车车轮轴承;

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