...
  • 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 >Effects of multiple cracks on the forced response of centrifugal impellers
【24h】

Effects of multiple cracks on the forced response of centrifugal impellers

机译：多重裂纹对离心叶轮受力响应的影响

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

The effects of multiple cracks on the forced response of centrifugal impellers are investigated using a finite-element based component mode synthesis method (CMS) in this paper. The main objective is to gain some insights into the response characteristics of multiple cracked impellers and to explore efficient methods for identifying the cracks. First, in order to generate an efficient model for the nonlinear vibration analysis, a novel hybrid interface CMS method is proposed and used to conduct reduced-order modeling for the cracked impeller. Then, a method for multiple cracks modeling is developed to account for the crack breathing effects. Finally, numerical results are presented using a representative impeller with double cracks. The shifts of natural frequencies and the nonlinear forced response due to multiple cracks are of interest Lengths and relative positions of the cracks are also considered. The results show that the natural frequencies and forced response become complexly depending on the lengths and relative positions of cracks, and the response amplitudes of blades periodically fluctuate versus blade number when an impeller suffers from cracks or mistuning. A potential method for identifying the lengths and relative positions of multiple cracks are also discussed in this paper.
机译：本文采用基于有限元的模态综合方法（CMS），研究了多个裂纹对离心叶轮受力响应的影响。主要目的是深入了解多个裂纹叶轮的响应特性，并探索识别裂纹的有效方法。首先，为了生成用于非线性振动分析的有效模型，提出了一种新的混合界面CMS方法，并将其用于裂纹叶轮的降阶建模。然后，开发了一种用于多个裂纹建模的方法来解决裂纹呼吸效应。最后，使用具有双裂纹的代表性叶轮给出了数值结果。固有频率的变化和由于多个裂纹引起的非线性强迫响应引起了人们的关注，还考虑了裂纹的长度和相对位置。结果表明，固有频率和强迫响应会随着裂纹的长度和相对位置而变得复杂，并且当叶轮遭受裂纹或误击时，叶片的响应幅度会随叶片的数量而周期性地波动。本文还讨论了一种识别多个裂纹的长度和相对位置的潜在方法。

著录项

  • 来源
    《Mechanical systems and signal processing》 |2015年第8期|326-343|共18页
  • 作者

    Shuai Wang; Yanyang Zi; Zhiguo Wan; Bing Li; Zhengjia He;

  • 作者单位

    State Key Laboratory for Manufacturing and Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    State Key Laboratory for Manufacturing and Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    State Key Laboratory for Manufacturing and Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    State Key Laboratory for Manufacturing and Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

    State Key Laboratory for Manufacturing and Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Multiple cracks; Natural frequency shift; Component mode synthesis; Nonlinear forced response; Vibration localization;

    机译：多个裂缝;自然频移分量模式合成;非线性强制响应;振动定位;

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