計測波形による欠陥形状の再生と使用周波数帯域に関する考察

抄録

The linearized inverse scattering methods are applied to the shape reconstruction of defects in elastic body. The linearized methods are based on Born and Kirchhoff approximations for unknown displacement fields in the integral representation. To show the versatility of the methods, the experimental measurement is performed to collect the scattered waveforms from defects. The results show that the shape of defects can be reconstructed by the linearized methods with processed waveforms from ultrasonic measurement. It is shown that the scattered wave component in the low frequency range is important for the shape reconstruction.