抄録
This paper proposes a method of acoustic vibration testing using a pulse sound source generated by laser ablation. Plasma formation can be realized by the laser ablation that generates a shock wave. Then the shock wave that is yielded by consuming a part of the plasma energy becomes the pulse sound source. The authors have proposed a method of acoustic vibration testing based on laser-induced breakdown. However, the process of generating the laser-induced breakdown may fluctuate depending on the conditions of the spot radius of the convex lens. We therefore introduce acoustic excitation method using laser ablation to improve the reproducibility and reliability of creating the pulse sound source. In this method, acoustic excitation is produced with the laser ablation by placing a very small piece at the sound source's location. The system is validated by comparing the resonant frequencies of an aluminum pipe measured by laser ablation with theoretical values.
