Multimode Measurement of Lamb Wave Propagating on Thin Isotropic Metal Sheet by Line-Focus PVDF Transducer
An experimental approach for determining the multimode lamb wave velocity of a thin isotropic aluminum sheet is presented in this paper.Up to 10 modes are finally obtained with in a broadband frequency range.A lens-less line-focus transducer whose active element is polyvinylidene fluoride (PVDF) film is employed by the defocusing measurement system.The V(f, z) analyzing method and a mode-tracing algorithm are applied in the waveform processing and the extraction of wave velocity.The agreement of the experimental result with the theoretical value indicates that the dispersion curve can be determined accurately.The discussions on the future applications and improvements are addressed.
multimode measurement line-focus transducer dispersive curves
He Cunfu Lu Yan Song Guorong Yung-Chun Lee Wu Bin
College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technolog College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technolog
国际会议
哈尔滨
英文
560-564
2013-08-16（万方平台首次上网日期，不代表论文的发表时间）