351 超音波深傷試験をモデルとした有限要素解析への無反射境界の導入(OS2-1 欠陥検出)(OS2 超音波と材料評価)  [in Japanese] 351 Absorbing Boundary in Finite-element Modeling of Ultrasonic Techniques  [in Japanese]

Analytical approaches to the modeling of elastic wave propagation in solids are difficult to apply in the ultrasonic nondestructive testing (NDT) systems, where one is interested in predicting realistic transducer signals from ultrasound interactions with complex defect shapes. This report presents a finite element formulation for an overall ultrasonic NDT. Viscous boundaries are introduced to limit the problem domain to part of a tested material. These make it possible to reduce computational costs.