ショートプレゼン1

[P01-01] 2-D elastodynamic time-reversal analysis using topological sensitivity and its application to ultrasonic linear array testing

*Masahiko Tashiro¹, Takahiro Saitoh¹, Kazushi Kimoto² (1. Gunma University, 2. Okayama University)

Keywords:Time domain boundary element method, Topological sensitivity, Time-reversal method, Linear array transducer, Ultrasonic non-destructive testing

This study conducts 2-D elastodynamic time-reversal analysis using topological sensitivity. The time-reversal method is one of the effective inverse scattering technique to detect a defect in elastic solids. The topological sensitivity is utilized to determine the convergence area of time-reversed waves from a linear array transducer. The convolution quadrature time-domain boundary element method (CQBEM) for 2-D elastodynamics is used to obtain scattered and time-reversed wave fields. Some defect detection results obtained by using this approach are demonstrated to investigate the performance of the present method.