基于弹性波传播特性的变截面转轴横向裂纹检测方法

doi:10.3901/JME.2020.10.042

机械工程学报 ›› 2020, Vol. 56 ›› Issue (10): 42-49.doi: 10.3901/JME.2020.10.042

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基于弹性波传播特性的变截面转轴横向裂纹检测方法

魏义敏¹, 刘琪¹, 陈文华¹, 杨世锡²

1. 浙江理工大学机电产品可靠性分析与测试国家地方联合工程研究中心杭州 310016;
2. 浙江大学机械工程学院杭州 310027

收稿日期:2019-03-08 修回日期:2020-02-18 出版日期:2020-05-20 发布日期:2020-06-11
通讯作者: 陈文华(通信作者),男,1963年出生,博士,教授,博士研究生导师。主要研究方向为机电产品可靠性技术。E-mail:chenwh@zstu.edu.cn
作者简介:魏义敏,男,1986年出生,博士,讲师。主要研究方向为振动传播机理、设备状态监测和故障诊断、机电产品可靠性设计与试验。E-mail:yiminwei@126.com
基金资助:
浙江省公益研究计划（LGG18E050021）、国家青年自然科学基金（51505430）和NSFC-浙江两化融合基金（U1709210）资助项目。

Transverse Crack Detection for a Rotating Shaft with Variable Cross-section Based on Propagation Characteristics of the Elastic Waves

WEI Yimin¹, LIU Qi¹, CHEN Wenhua¹, YANG Shixi²

1. National and Local Joint Engineering Research Center of Reliability Analysis and Testing for Mechanical and Electrical Products, Zhejiang Sci-Tech University, Hangzhou 310016;
2. College of Mechanical Engineering, Zhejiang University, Hangzhou 310027

Received:2019-03-08 Revised:2020-02-18 Online:2020-05-20 Published:2020-06-11

摘要/Abstract

摘要： 转轴不同的受力条件使裂纹具有不同的裂纹模式，在利用弹性波传播特性对横向裂纹进行检测时需要考虑裂纹模式的影响。在不同裂纹模式下推导得出裂纹的局部柔度系数，随后建立不同的裂纹模式下弹性波的传递矩阵，搭建转轴裂纹试验台，分析出其裂纹模式为模式III，同时定性分析裂纹深度对转轴中弹性波传播特性的影响。试验结果验证了理论分析出的裂纹模式的正确性，而裂纹深度主要影响弹性波阻带带宽和中心频率。研究结果可为变截面转轴裂纹模式的选取提供参考，也为横向裂纹的检测提供了一种方法。

关键词: 传播特性, 裂纹模式, 弹性波, 转轴, 变截面

Abstract: The transverse crack has different crack modes due to the external loads of the rotating shaft, the influence of crack mode should be considered when using propagation characteristics of the elastic wave to detect transverse crack. The local flexibility coefficients of the crack are deduced for different crack modes, and then the transfer matrix with different crack modes is established. An experimental rig for studying the transverse crack is built, the crack mode of which is analyzed theoretically, and the influence of crack depths on the propagation characteristics of elastic waves in the rotating shaft is analyzed qualitatively. The experimental results verify the result of the theoretical analysis of the crack mode, and the crack depth mainly affects the band width and center frequency of the stop band of the elastic waves. The conclusions can provide a reference for the selection of the crack mode of crack in the rotating shaft with variable section and also a method for the detection of an transverse crack.

Key words: propagation characteristic, crack modes, elastic waves, rotating shaft, variable cross-section

中图分类号:

TH17
TH113

魏义敏, 刘琪, 陈文华, 杨世锡. 基于弹性波传播特性的变截面转轴横向裂纹检测方法[J]. 机械工程学报, 2020, 56(10): 42-49.

WEI Yimin, LIU Qi, CHEN Wenhua, YANG Shixi. Transverse Crack Detection for a Rotating Shaft with Variable Cross-section Based on Propagation Characteristics of the Elastic Waves[J]. Journal of Mechanical Engineering, 2020, 56(10): 42-49.

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基于弹性波传播特性的变截面转轴横向裂纹检测方法

Transverse Crack Detection for a Rotating Shaft with Variable Cross-section Based on Propagation Characteristics of the Elastic Waves

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