• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Friction-induced vibration in disk brake systems.
【24h】

Friction-induced vibration in disk brake systems.

机译：盘式制动系统中由摩擦引起的振动。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Friction forces are known to induce rotor whirling and stator torsional oscillations in disk brake mechanical systems that are potentially damaging to the brake system. This dissertation presents a detailed analysis of the dynamic behavior of a single rotor/stator disk brake system. We consider the dynamics of the stator, the rotor, and the combined rotor/stator system. First, a non-rotational mathematical model is constructed with the purpose of showing that friction induced vibration can occur in the stator without assuming stick-slip rotor/stator contact or a friction coefficient that decreases with increasing slipping velocity. Self-induced vibrations are analyzed via the application of the method of multiple scales. The stability boundaries of the primary, super-harmonic, and subharmonic resonance are determined.; Rotational effects are investigated by considering three mathematical brake models. The first two models describe a spinning rotor engaging a rigid stator. The third has a spinning rotor engaging a stator with torsional flexibility. Again, a constant friction coefficient is assumed. The stability of steady whirl solutions for the mathematical models are determined as a function of the system parameters. It is determined that only forward whirl modes are stable and under some circumstances no stable steady whirl modes exist. It is shown that unsteady rotor whirl can be an important excitation source of stator torsional oscillations and that the settling time to no-slip decreases as the ratio of the stator to rotor stiffness increases.; Experimental rotor whirl speed and stator squeal frequency results are presented that agree with the analytical predictions of the rotational models. That is the experimental results show the same trends predicted in the analytical models. It was discovered analytically and verified experimentally that for high stiffness ratios there exists whirl modes of the rotor that have a very high whirl speed at a low spin speed which can result in component damage. Additionally, it was found that a time increasing brake line hydraulic pressure results in a violent ramping up of the rotor whirl speed.
机译：已知摩擦力会在盘式制动器机械系统中引起转子回旋和定子扭转振动，这可能会损坏制动系统。本文对单转子/定子盘式制动系统的动力学行为进行了详细的分析。我们考虑了定子，转子以及组合的转子/定子系统的动力学。首先，构建非旋转数学模型，其目的是表明在不假定粘滑转子/定子接触或摩擦系数随滑移速度增加而降低的情况下，在定子中可能发生由摩擦引起的振动。通过应用多尺度方法分析自感应振动。确定了初级，超谐波和亚谐波谐振的稳定性边界。通过考虑三个数学制动模型来研究旋转效应。前两个模型描述了与刚性定子接合的旋转转子。第三个具有旋转转子，该转子与定子具有扭转柔性。再次假设恒定的摩擦系数。根据系统参数确定数学模型的稳定涡旋解的稳定性。确定只有前向旋转模式是稳定的，并且在某些情况下不存在稳定的稳定旋转模式。结果表明，不稳定的转子涡动可能是定子扭转振动的重要激励源，并且随着定子与转子刚度之比的增加，无滑移的建立时间会减少。实验转子旋转速度和定子尖叫频率的结果与旋转模型的分析预测吻合。也就是说，实验结果显示出在分析模型中预测的相同趋势。通过分析发现并通过实验验证，对于高刚度比，存在转子的旋转模式，该模式在低旋转速度下具有非常高的旋转速度，这会导致组件损坏。另外，发现随着时间增加制动管路液压会导致转子涡流速度急剧上升。

著录项

  • 作者

    Hagler, Lisle Bruce.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Engineering Mechanical.; Engineering Automotive.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 117 p.
  • 总页数 117
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;自动化技术及设备;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号