基于振动声调制的金属微裂纹检测方法

中国机械工程

基于振动声调制的金属微裂纹检测方法

方漂漂1;郑慧峰1;喻桑桑1;竺科仪2;王月兵1 ; 曹文旭1

1.中国计量学院，杭州，310018
2.哈帝环保科技有限公司，杭州，310018

出版日期:2016-06-10 发布日期:2016-06-08
基金资助:
国家自然科学基金资助项目（11474259）；浙江省自然科学基金资助项目（LY14E050013，LY15E050012）；浙江省公益技术应用研究项目（2014C31109）；浙江省“仪器科学与技术”重中之重学科开放基金资助项目；工程车辆安全性设计与可靠性技术湖南省重点实验室资金资助项目（KF1601）

Metal Micro Crack Detection Based on Vibro-acoustic Modulation Method

Fang Piaopiao1;Zheng Huifeng1;Yu Sangsang1;Zhu Keyi2;Wang Yuebing1;Cao Wenxu1

1.China Jiliang University, Hangzhou, 310018
2.Hadi Environmental Protection Technology Company, Hangzhou, 310018

Online:2016-06-10 Published:2016-06-08
Supported by:

摘要/Abstract

摘要： 为克服传统线性超声无法检测微纳级宽度裂纹的缺点，开展了振动声调制法检测金属微裂纹的研究。用有限元分析软件ABAQUS开展了仿真研究，并验证了该方法的有效性，为实验参数设置提供了参考。搭建振动声调制检测系统，分析了不同长度微裂纹的调制特性，提出了基于振动声调制信号的信息熵定量表征方法。结果表明，存在微裂纹的铝板的振动声调制信号中的旁瓣信号明显，且检测信号的信息熵随裂纹长度单调增大，可作为振动声调制法检测微裂纹长度的特征参数。

关键词: 微裂纹, 振动声调制, 非线性超声, 定量表征

Abstract: In order to overcome the shortages that traditional linear ultrasonic testing could not detect the micro-cracks, VAM was studied. The VAM was simulated with finite element software ABAQUS to demonstrate the validity of the proposed method. The parameter setting of experimental testing system was also depended on the simulation results. VAM experimental testing system was established to investigate the nonlinear characteristic for micro cracks with variable lengths, and a quantitative characterization method was proposed based on information entropy of modulation signals. The results show that side-band signals are obvious when there is a micro crack in aluminum plate. The information entropy of modulation signals increases monotonically with increasing micro crack lengths and can be used as the characteristic parameter of crack length using VAM method.

Key words: micro crack, vibro-acoustic modulation (VAM), nonlinear ultrasonic, quantitative characterization

中图分类号:

TB523

方漂漂, 郑慧峰, 喻桑桑, 竺科仪, 王月兵 , 曹文旭. 基于振动声调制的金属微裂纹检测方法[J]. 中国机械工程.

Fang Piaopiao, Zheng Huifeng, Yu Sangsang, Zhu Keyi, Wang Yuebing, Cao Wenxu. Metal Micro Crack Detection Based on Vibro-acoustic Modulation Method[J]. China Mechanical Engineering.

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