文献类型：期刊文献

英文题名：Waveform inversion for wavenumber extraction and waveguide characterization using ultrasonic Lamb waves

作者：Chen, Honglei[1];Ling, Feiyao[2];Zhu, Wujun[3];Sun, Di[3];Liu, Xiaoyu[4];Li, Ying[2];Li, Dan[2];Xu, Kailiang[1,2];Liu, Zenghua[4];Ta, Dean[1,2]

机构：[1]Fudan Univ, Acad Engn & Technol, Shanghai 200433, Peoples R China;[2]Fudan Univ, Ctr Biomed Engn, Sch Informat Sci & Technol, Shanghai 200438, Peoples R China;[3]East China Univ Sci & Technol, MOE Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[4]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

年份：2023

卷号：207

外文期刊名：MEASUREMENT

收录：;EI(收录号：20225213318505);WOS:【SCI-EXPANDED(收录号:WOS:001001063700001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai, China (19ZR1402700) , China Postdoctoral Science Founda-tion (KLH2310005) , Shanghai Rising Star Program, China (20QC1400200) .

语种：英文

外文关键词：Ultrasonic Lamb waves; Inversion problem; Wavenumber dispersion; Quantitative ultrasound; Waveguide characterization

摘要：Wavenumber dispersion of ultrasonic Lamb waves associating with the thickness and material property of plates plays an important role in waveguide characterization and non-destructive testing. Classical waveguide char-acterization with wavenumber estimation methods is performed based on a large amount of Lamb wave signals or sensitive to wave mode overlapping and noise. A genetic algorithms-based waveform inversion method is developed for wavenumber extraction of one Lamb wave signal and characterization of plate in this work. The individual chromosome is encoded in real number by the thickness and material properties of the structure. The elastic formula of Lamb waves is solved by the bisection method to further derive the wavenumber curves; then the wave mode signals are generated based on the propagation function, and are linearly combined to form the individual signal. The signal with the minimum residual ratio to the analysis signal is iteratively searched by the genetic algorithm. Finally, the plate properties and wavenumber of Lamb waves are identified with the chro-mosome of searched individual. Numerical and experimental studies prove the developed waveform inversion method can realize accurate wavenumber extraction of a Lamb wave signal, even though its time-frequency representation has low sparsity, and characterization of plate. The residual ratio between the inversion wave-number and theory curves is around 1%; and the estimation deviation of material properties of plate is around 6%.