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Author

  • Alalade, Muyiwa (1)
  • Köhn, Daniel (1)
  • Lahmer, Tom (1)
  • Reichert, Ina (1)
  • Wuttke, Frank (1)

Institute

  • Institut für Strukturmechanik (1)
  • Materialforschungs- und -prüfanstalt an der Bauhaus-Universität (1)

Keywords

  • Damm (1)
  • Defekt (1)
  • damage identification (1)
  • dams (1)
  • full-waveform inversion (1)
  • inverse analysis (1)
  • wave propagation (1)

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A Cyclic Multi-Stage Implementation of the Full-Waveform Inversion for the Identification of Anomalies in Dams (2022)
Alalade, Muyiwa ; Reichert, Ina ; Köhn, Daniel ; Wuttke, Frank ; Lahmer, Tom
For the safe and efficient operation of dams, frequent monitoring and maintenance are required. These are usually expensive, time consuming, and cumbersome. To alleviate these issues, we propose applying a wave-based scheme for the location and quantification of damages in dams. To obtain high-resolution “interpretable” images of the damaged regions, we drew inspiration from non-linear full-multigrid methods for inverse problems and applied a new cyclic multi-stage full-waveform inversion (FWI) scheme. Our approach is less susceptible to the stability issues faced by the standard FWI scheme when dealing with ill-posed problems. In this paper, we first selected an optimal acquisition setup and then applied synthetic data to demonstrate the capability of our approach in identifying a series of anomalies in dams by a mixture of reflection and transmission tomography. The results had sufficient robustness, showing the prospects of application in the field of non-destructive testing of dams.
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