Experimental Teaching Design of Lamb Wave Dispersion Measurement System
Based on the results accumulated by the teaching team in scientific research experiments,the Lamb wave dispersion measurement experiment system was built for teaching undergraduates in authors'school for the first time.The system is composed of signal generator,acoustic wave transmitting and receiving transducer,oscilloscope and three-axis positioning device,etc.Through the experimental project,students not only master the basic knowledge of Lamb wave dispersion and attenuation characteristics,but also stimulate students'enthusiasm for scientific research.The experimental results show that the phase of symmetric Lamb waves leaking to both sides of the steel plate is the same,and the phase of antisymmetric Lamb waves leaking to both sides of the steel plate is opposite.The strong oscillation time of symmetric Lamb waves in the time domain waveform reflects the strong dispersion characteristics at the measurement frequency band.The design of the experimental teaching content is inspired by the scientific research experiment of the course group teachers,and the idea is novel and easy to realize,which reflects the educational concept of the integration of science and education.
Lamb wavedispersion characteristicsexperimental teachingscience and education integration
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