軸方向ノッチ欠陥における円周SH板波の共鳴現象

抄録

Resonant characteristics of the circumferential (C-) SH wave converted from the T(0,1) mode guided wave at an axial elongated notch defect was presented. First, it was shown that sorts of ringing signals were observed immediately after the defect signal in the RF time domain signals when the resonance occurred. Secondly, the standing wave of the converted C-SH wave was verified experimentally with the laser Doppler vibrometer and numerically with FEM simulation. It was confirmed that the resonances were occurred when the number of wavelengths took integer and half integer.