Identification of nonlinear ultrasonic effects using method of dynamic wavelet fingerprint - 文章详情页

作者：

Jiao, J. (Jiao, J..) | Lü, H. (Lü, H..) | Meng, X. (Meng, X..) | Wu, B. (Wu, B..) | He, C. (He, C..)

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摘要：

Toward　the　characterization　of　early　stage　damage　of　structures　by　nonlinear　ultrasonic　testing　technology,　a　dynamic　wavelet　fingerprint　(DWFP)　analysis　method　was　developed　for　nonlinear　ultrasonic　signal　analyzing,　and　nonlinear　characterization　parameter　of　early　damage　based　on　DWFP　distribution　was　proposed　as　well.　Meanwhile　the　influence　of　different　wavelet　basis　functions　and　scale　extents　on　nonlinear　ultrasonic　effects　extraction　is　investigated,　and　the　optimal　wavelet　basis　functions　and　scale　extents　sensitive　to　early　stage　damage　are　obtained.　After　that,　DWFT　analysis　method　was　applied　to　harmonic　and　frequency-mixing　nonlinear　ultrasonic　test　signals　analysis.　It　has　been　shown　that　DWFT　analysis　method　can　effectively　extract　the　harmonic　and　frequency-mixing　components　embedded　in　testing　signals,　and　nonlinear　characterization　parameter　based　on　DWFP　distribution　is　capable　of　quantifying　characterization　of　micro-crack　in　plate　structures.　Useful　exploration　is　done　for　nonlinear　ultrasonic　testing　signal　analysis.　©　2017　Acta　Acustica.

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作者机构：

[ 1 ] [Jiao, J.]College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Jiao, J.]Beijing Engineering Research Center of Precision Measurement Technology & Instruments, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Lü, H.]College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Meng, X.]College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Wu, B.]College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Wu, B.]Beijing Engineering Research Center of Precision Measurement Technology & Instruments, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [He, C.]College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [He, C.]Beijing Engineering Research Center of Precision Measurement Technology & Instruments, Beijing University of Technology, Beijing, 100124, China

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