• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Modeling Disk Cracks in Rotors by Utilizing Speed Dependent Eccentricity
【24h】

Modeling Disk Cracks in Rotors by Utilizing Speed Dependent Eccentricity

机译：利用速度相关的偏心率对转子中的磁盘裂纹进行建模

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

This paper discusses the feasibility of vibration-based structural health monitoring for detecting disk cracks in rotor systems. The approach of interest assumes that a crack located on a rotating disk causes a minute change in the system's center of mass due to the centrifugal force induced opening of the crack. The center of mass shift is expected to reveal itself in the vibration vector (i.e., whirl response; plotted as amplitude and phase versus speed) gathered during a spin-up and/or spin-down test. Here, analysis is accomplished by modeling a Jeffcott rotor that is characterized by analytical, numerical, and experimental data. The model, which has speed dependent eccentricity, is employed in order to better understand the sensitivity of the approach. For the experimental set-up emulated here (i.e., a single disk located mid-span on a flexible shaft), it appears that a rather sizable flaw in the form of a through-thickness notch could be detected by monitoring the damage-induced shift in center of mass. Although, identifying actual disk cracks in complex "real world" environments, where noncritical crack lengths are small and excessive mechanical and/or electrical noise are present, would prove to be rather challenging. Further research is needed in this regard.
机译：本文讨论了基于振动的结构健康监测在检测转子系统中磁盘裂纹方面的可行性。感兴趣的方法假定旋转盘上的裂纹由于离心力引起的裂纹打开而导致系统质心的微小变化。预期在自转和/或自转测试期间收集的振动矢量（即，旋转响应;绘制为幅度和相位与速度的关系）中会揭示质心转移的中心。在此，分析是通过对Jeffcott转子建模来完成的，该转子具有分析，数值和实验数据。为了更好地理解该方法的敏感性，采用了模型，该模型具有与速度有关的偏心率。对于此处模拟的实验设置（即，单个磁盘位于跨度位于柔性轴的中间跨度上），似乎可以通过监视损坏引起的偏移来检测到相当大的缺陷，即贯穿厚度的缺口在质心。虽然，要在复杂的“真实世界”环境中识别实际的磁盘裂纹是非常困难的，在这种环境中，非临界裂纹长度很小，并且存在过多的机械和/或电气噪声。在这方面需要进一步的研究。

著录项

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