• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >Quasi Steady-state Conditions for Transient Vibration of a Jeffcott Rotor during Acceleration
【24h】

Quasi Steady-state Conditions for Transient Vibration of a Jeffcott Rotor during Acceleration

机译：Jeffcott转子加速过程中瞬态振动的准稳态条件

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

Since flexible rotor systems normally operate above their first several critical speeds, much attention is paid to transient vibration problems resulting from their passing through critical speeds during acceleration in order to reach their operating speed. When an unbalanced Jeffcott rotor system accelerates passing through its critical speeds, it will have transient vibration caused by the imbalance-induced harmonic excitation whose frequency changes as the rotating speed. In this paper, this vibration under constant acceleration is solved by using the analytic method; moreover, with varying rotating speed discretized, a series of its general responses with the harmonic excitation whose frequency is one of all the discretized constant rotating speeds are applied to represent approximately its transient vibration in each time step. Comparing numerical simulations of these two methods, appropriate qualitative conditions known as the quasi steady-state conditions for transient vibration of this rotor are established under which the analytic solution can be replaced by the results from the approximate method. Through searching the quasi steady-state conditions, what are special requirements can be found in order for one to use continuous active balancing operations with a sequence of finite constant rotating speeds to perform active balancing of a rotor during acceleration.
机译：由于柔性转子系统通常在其最初的几个临界速度以上运行，因此要特别注意瞬态振动问题，这些问题是由于在加速过程中它们通过临界速度而达到其运行速度而引起的。当不平衡的Jeffcott转子系统加速通过其临界速度时，它会因不平衡感应的谐波激励而引起瞬态振动，其谐波频率随转速而变化。本文采用解析法解决了恒加速度下的振动问题。此外，在离散转速变化的情况下，其一系列谐波激励的一般响应（其频率是所有离散恒定转速之一）被应用于代表每个时间步长的近似瞬态振动。比较这两种方法的数值模拟，建立了适当的定性条件，称为该转子瞬态振动的准稳态条件，在该条件下可以用近似方法的结果代替解析解。通过搜索准稳态条件，可以发现有什么特殊要求，以便使人们能够使用一系列有限的恒定转速连续进行主动平衡操作，从而在加速过程中对转子进行主动平衡。

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