噪声与振动控制

›› 2012, Vol. 32 ›› Issue (1): 119-123.DOI: 10.3969/j.issn.1006-1355-2012.01.028

• 6.信号处理与故障诊断 • 上一篇    下一篇

基于导波的焊接方管损伤检测的仿真与实验分析

陆希1,周利民,孟光2   

  1. （ 1. 上海交通大学 机械系统与振动国家重点实验室， 上海 200240；2. 香港理工大学 机械工程系， 香港特别行政区 ）
  • 收稿日期:2011-03-24 修回日期:1900-01-01 出版日期:2012-02-18 发布日期:2012-02-18
  • 通讯作者: 陆希

Simulation and Experimental Study on Damage Detection in Welded Rectangular Tube Based on Guided Wave

<FONT face=Verdana><a href="https://nvc.sjtu.edu.cn/EN/article/advancedSearchResult.do?searchSQL=(((LU Xi[Author]) AND 1[Journal]) AND year[Order])" target="_blank">LU Xi</a> 1, 2,ZHOU Li-min 2,MENG Guang 1</FONT>   

  1. (1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China;2. Department of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong, China )
  • Received:2011-03-24 Revised:1900-01-01 Online:2012-02-18 Published:2012-02-18
  • Contact: LU Xi

摘要： 基于导波的损伤检测方法是结构健康监测领域的研究热点，并在工程应用上表现出很大的潜力。通过有限元仿真和实验分析的方法对某型列车底盘转向架局部焊接方管结构上的损伤检测问题进行研究。仿真中建立结构的三维模型以模拟导波在其中的传播过程，实验中采用主动式换能器网络激发和接受在结构中传播的导波。优选激励频率以减少导波固有的多模式现象对后续信号分析的影响。借助小波变换和希尔伯特变换等方法对所有采集到的信号进行处理，并利用“导波三角定位法”进行损伤定位。实验结果验证了该方法的有效性。

关键词: 振动与波, 导波三角定位法, 仿真与实验分析, 焊接损伤, 信号处理

Abstract: Guided wave based detection methods have become a hot area of research in structural health monitoring (SHM), and have a great potential in engineering applications. A welded tubular component, which is a segment of train bogie frame, was investigated by using both finite element method (FEM) and experimental analysis for the purpose of damage detection. 3D FEM models were established to simulate the propagation characteristics of guided waves in the component. An active transducer network was employed to generate guided waves propagating in the structures and to collect response signals. Excitation frequency was carefully optimized to diminish the effect of the intrinsic multi-mode phenomenon of guided waves on the consequent signal interpretation. Continuous wavelet transform (CWT) and Hilbert transform (HT) were applied to all collected signals successively. Guided wave-based triangulation was developed and consequently utilized in damage location estimation. Effectiveness of the recommended approach was validated in experiments.

Key words: vibration and wave, guided wave-based triangulation, FEM and experimental analysis, welding damage, signal processing

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