固体接触面における斜角入射超音波の高調波発生特性に関する実験的検討

抄録

The higher harmonic generation characteristics at contacting surfaces subjected to an obliquely incident ultrasonic wave is studied experimentally. To this purpose, a 10-cycle, 1-MHz longitudinal burst wave is sent to the contacting interface of aluminum blocks with the incident angle 45°. The amplitudes of the fundamental and the second-harmonic components are evaluated quantitatively by calibrating the voltage amplitudes obtained by the piezoelectric transducer against a laser-Doppler vibrometer. The results are compared to those for the normal incidence. The influence of the contact pressure and the surface roughness on the harmonic generation behavior is examined.