• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanical systems and signal processing >Nonlinear rotordynamics of a MDOF rotor-stator contact system subjected to frictional and gravitational effects
【24h】

Nonlinear rotordynamics of a MDOF rotor-stator contact system subjected to frictional and gravitational effects

机译：MDOF转子定子接触系统的非线性旋转性能，经受摩擦和引力效应

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

Rotating machines are intrinsically susceptible to expensive and high-risk faults such as rotor-stator rub. During a rub event normal and tangential forces are generated by the contact and friction that cause wear at the contacting interfaces. In the present work, such forces are computed by assuming linear elastic contact and Coulomb friction at multiple interface locations. A finite element shaft-line model of a horizontally mounted rotor is used to demonstrate the approach and the model is reduced for computational efficiency. The modal assurance criterion is used to identify the linear modes that contribute to a given solution. It is observed that bouncing solutions exist with rotor-stator contact in complex machines that can be viewed as internal resonances involving a small number of modes. The responses can become complex because different modes can combine to give the internal resonance (and hence a larger range of frequency ratios) and because of asymmetries, such as gravity. One design goal is to avoid any contact in the system and the analysis in this paper identifies the conditions for internal resonance that should be avoided in a real machine. The complicated dynamics shown here reveal some of the distinct features of contacting solutions and could also be used in condition monitoring to characterise faults.
机译：旋转机器本质上易于昂贵且高风险的故障，如转子定子摩擦。在RUB事件期间，正常和切向力由导致接触界面磨损的接触和摩擦产生。在本作工作中，通过在多个接口位置假设线性弹性接触和库仑摩擦来计算这种力。水平安装转子的有限元轴线模型用于展示方法，并且模型降低了计算效率。模态保证标准用于识别有助于给定解决方案的线性模式。观察到，在复杂的机器中，具有转子定子触点存在弹跳解决方案，该转子可以被视为涉及少量模式的内部共振。响应可以变得复杂，因为不同的模式可以组合以给出内部共振（并且因此较大的频率比率）并且由于不对称，例如重力。一个设计目标是避免系统中的任何接触，本文中的分析标识了在真实机器中应避免的内部共振的条件。这里显示的复杂动态显示了接触解决方案的一些不同特征，也可以用于条件监测以表征故障。

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