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●表面波探査 -関係論文- ↑上へ戻る |
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Laboratory Studies of Surface Waves Using a Laser Doppler Vibrator We have performed physical modeling of surface waves using a laser Doppler vibrometer (LDV). Surface wave methods have been applied to both engineering and earth science problems to image S-wave velocity of the Earth. In order to develop the surface methods, numerical and physical modeling of surface waves are important. The LDV converts a particle velocity of media to the Doppler shift frequency, and enables us to measure very precise ultrasonic waves. A piezoelectric transducer (PZT) was used as a source of elastic waves. 50KHz to 500KHz elastic waves were observed by using the LDV and PZT. We have measured surface waves propagating a homogeneous half space models and horizontal two-layer models using the LDV and PZT. Theoretical characters of surface waves, such as Rayleigh wave dispersion, have been clearly observed by the physical modeling. つくば技術開発センター：探査工学センター |
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