Page - 1171 - in Book of Full Papers - Symposium Hydro Engineering

(a) Setup 1 (b) Setup 2 Fig. 5 FWI model comparison for acquisition setup 1 and 2. 5. CONCLUSIONS Although the Full Waveform Inversion (FWI) has mainly been applied to subsurface exploration of material properties in practice, results obtained in this paper has shown its applicability for non-destructive tests (NDT) of super- structures. The FWI formulation used in our investigation is capable of effectively identifying and quantifying regions of weaknesses (i.e. heterogeneity) in both the dam structure and its foundation. The quality of the inversion is dependent on the initial model, the acquisition geometry and noise level in the measurement data. 5.1. ACKNOWLEDGEMENTS The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) under the grant LA - 2869/4-1. REFERENCES [1] H. NGUYEN-VINH, I. BAKAR, M.A. MSEKH, J-H SONG, J. MUTHU, G. ZI, P. LE, S. PIERRE A. BORDAS, R. SIMPSON, S. NATARAJAN, et al. Extended finite element method for dynamic fracture of piezo-electric materials. Engineering Fracture Mechanics, 92:19–31, 2012. 1171