Analysis of nonlinear response of shrouded blades system

SHI Ya-jie; SHAN Ying-chun; ZHU Zi-gen

Chinese

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Analysis of nonlinear response of shrouded blades system

更新时间：2026-07-07

- Analysis of nonlinear response of shrouded blades system
- Vol. 24, Issue 5, (2009)
- 作者机构：
  
  1. 中国民用航空总局航空安全技术中心航空安全研究所,北京,100028
  2. 北京航空航天大学交通科学与工程学院,北京,100191
  3. 北京航空航天大学能源与动力工程学院,北京,100191
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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SHI Ya-jie, SHAN Ying-chun, ZHU Zi-gen. Analysis of nonlinear response of shrouded blades system[J]. 2009, 24(5).
DOI：

SHI Ya-jie, SHAN Ying-chun, ZHU Zi-gen. Analysis of nonlinear response of shrouded blades system[J]. 2009, 24(5). DOI：

摘要

基于时频转换的思想

提出了一套利用叶片自由模态求解带凸肩叶片非线性振动响应的方法.该方法消除了原来方法在时频转换过程中存在的一些问题

并考虑了振动过程中接触刚度随正压力的变化

提高了计算效率和结果的准确性

计算结果与试验结果具有很好的一致性

完全能够满足叶片减振设计的工程需要.此外

还分析了自由模态阶数对计算结果的影响

发现当接触面接近自由时

需要少阶的叶片自由模态就能得到准确结果;而当接触面接近粘滞时

需要较多阶的模态才能得到准确响应.

Abstract

Base on the idea of alternating frequency/time(AFT) domain

an approach to predict the nonlinear response of a shrouded blade system was developed using free mode shapes.Some sources of error in the process of previous AFT were eliminated and the instantaneous variety of contact stiffness was taken into account

improving evidently the correctness and efficiency.Comparison of the calculated and experimental results proves that this method meet the engineering need of blade damping design fully.Furthermore

influences of the number of free mode shapes on the calculated results are studied.It is found that in the neighborhood of the fully slip region

few number of free mode shapes are required in order to obtain the accurate resonant response of a shrouded blade system;however

it need much more number of free mode shapes to obtain the accurate response in the neighborhood of the fully stuck region.

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Related Institution

School of Power and Energy,Xi'an Jiaotong University

State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University

Department of Automobile Engineering, Beijing University of Aeronautics and Astronautics

北京航空航天大学能源与动力工程学院

北京航空航天大学能源与动力工程学院航空发动机结构强度北京市重点实验室

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