OS0706 Quantitative measurements of harmonic generation in guided waves using laser Doppler vibrometer
Details
The harmonic generation characteristics in Rayleigh wave were studied experimentally in a quantitative manner. A tone-burst Rayleigh wave was generated in an aluminum alloy (A2024-T351) block by a wedge transducer. The use of a laser Doppler vibrometer allows measuring the out-of-plane velocity waveforms on the surface of the block quantitatively. Scanning the sensor head of the laser Doppler vibrometer along the beam axis of the Rayleigh wave, the dependence of fundamental wave amplitude and that of second harmonic amplitude on the propagation distance was evaluated.
