离心压缩机叶轮叶片疲劳断裂故障的数值分析

毛义军 1; 祁大同 1; 许庆余 2

您当前的位置：

首页 >

文章列表页 >

离心压缩机叶轮叶片疲劳断裂故障的数值分析

专题研究 | 更新时间：2025-07-09

- 离心压缩机叶轮叶片疲劳断裂故障的数值分析
- Numerical Study on High Cycle Fatigue Failure of a Centrifugal Compressor Impeller Blades
- 西安交通大学学报 2008年42卷第11期页码：1336-1339
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： O346;TB302.3
- 网络首发：2008-11-10，
  
  纸质出版：2008
- 稿件说明：
移动端阅览
毛义军 1, 祁大同 1, 许庆余 2. 离心压缩机叶轮叶片疲劳断裂故障的数值分析[J]. 西安交通大学学报, 2008,42(11):1336-1339.

Numerical Study on High Cycle Fatigue Failure of a Centrifugal Compressor Impeller Blades[J]. 2008, 42(11): 1336-1339.
毛义军 1, 祁大同 1, 许庆余 2. 离心压缩机叶轮叶片疲劳断裂故障的数值分析[J]. 西安交通大学学报, 2008,42(11):1336-1339. DOI：

Numerical Study on High Cycle Fatigue Failure of a Centrifugal Compressor Impeller Blades[J]. 2008, 42(11): 1336-1339. DOI：

摘要

采用有限元方法计算了离心压缩机叶轮叶片的前14阶模态和离心力作用下的静应力

并采用单向流固耦合方法计算了叶轮叶片在非定常气动力载荷下的等效交变应力.为了节省计算成本

离心叶轮采用满足循环对称条件的单扇区模型.计算结果表明:非定常气动力载荷的主频率落入叶轮叶片第6阶固有频率的共振区

导致在叶轮叶片的前缘附近区域形成局部共振

使该区域的等效应力最大; 离心叶轮叶片在离心力和非定常气动力共同作用下形成的交变应力小于工作条件下的屈服应力

不会形成叶片的塑性破坏

但交变载荷的长期作用导致了叶片前缘区域的高周疲劳破坏. 预测的叶片应力集中位置和实际断裂位置一致

表明了该方法在工程实践中的有效性.

Abstract

A finite element analysis(FEA)method was adopted to calculate the modes and static stress generated from centrifugal force of the impeller blades and a unidirectional coupled fluid-structure interaction method was applied to analyze the forced vibration of the impeller blade on excitation of the unsteady aerodynamic loads. In order to save the computational cost

the centrifugal impeller was modeled as a single sector based on the cycle symmetry assumption. The result shows that the insufficient margin between the dominant frequency of unsteady aerodynamic loads and the 6th natural frequency of the impeller blade results in local resonance vibration at the leading edge of the impeller blade. Although the equivalent stress is lower than the yield stress of steel

the high cycle fatigue(HCF)failure of the impeller blade may be caused by the long-term excitation of the unsteady aerodynamic loads. The predicted stress concentration region of the impeller blades is in accordance with the actual crack location.

关键词

Keywords

references

EJAZ N, SALAM I, TAUQIR A. Fatigue failure of a centrifugal compressor [J]. Engineering Failure Analysis,2007,14(7):1313-1321.

KIM T G, Lee H C. Failure analysis of(machinery vapor recompressor)MVR impeller blade [J]. Engineering Failure Analysis,2003, 10(3):307-315.

杨兴宇,耿中行,蔡向晖.某型发动机二级压气机叶片断裂故障分析研究 [J].航空动力学报,2001,16(4):327-330.

YANG Xingyu, GENG Zhongxing, CAI Xianghui. Fracture analysis of the 2nd stage compressor blade in an aeroengine [J]. Journal of Aerospace Power, 2001, 16(4):327-330.

QIN Wei, TSUKAMOTO H. Theoretical study of pressure fluctuations downstream of a diffuser pump impeller: fundamental analysis on rotor-stator interaction [J]. ASME Journal of Fluids Engineering,1997, 119(3):647-652.

张升才. 汽轮机叶片断裂机理分析[J].农业机械学报,2006,37(12):201-205.

ZHANG Shengcai. Mechanism study on fracture of turbine blade [J]. Transactions of the Chinese Society for Agricultural Machinery, 2006, 37(12):201-205.

EJAZ N, SALAM I, TAUQIR A. An air crash due to failure of compressor rotor [J]. Engineering Failure Analysis, 2007, 14(5):831-840.

XU Zili, PARK J P, RYU S J. Failure analysis and retrofit design of low pressure 1st stage blades for a steam turbine [J]. Engineering Failure Analysis, 2007, 14(4):694-701.

邱凯. 离心压缩机叶轮三维有限元强度与振动分析[D]. 西安:西安交通大学能源与动力工程学院,1999.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

离心压缩机性能预测中雷诺平均湍流模型的不确定度量化与分析

R1234ze（E）替代R134a对二级压缩循环离心压缩机及制冷性能的影响

离心压缩机级间加气的出口流场特性

基于喘振频域特性的失稳预警技术研究

不同导叶预旋角下离心压缩机的时序效应