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An Enhanced Full Waveform Inversion Method for the Structural Analysis of Dams

  • Since the Industrial Revolution in the 1700s, the high emission of gaseous wastes into the atmosphere from the usage of fossil fuels has caused a general increase in temperatures globally. To combat the environmental imbalance, there is an increase in the demand for renewable energy sources. Dams play a major role in the generation of “green" energy. However, these structures require frequent and strict monitoring to ensure safe and efficient operation. To tackle the challenges faced in the application of convention dam monitoring techniques, this work proposes the inverse analysis of numerical models to identify damaged regions in the dam. Using a dynamic coupled hydro-mechanical Extended Finite Element Method (XFEM) model and a global optimization strategy, damage (crack) in the dam is identified. By employing seismic waves to probe the dam structure, a more detailed information on the distribution of heterogeneous materials and damaged regions are obtained by the application of the Full Waveform Inversion (FWI) method. The FWI is based on a local optimization strategy and thus it is highly dependent on the starting model. A variety of data acquisition setups are investigated, and an optimal setup is proposed. The effect of different starting models and noise in the measured data on the damage identification is considered. Combining the non-dependence of a starting model of the global optimization strategy based dynamic coupled hydro-mechanical XFEM method and the detailed output of the local optimization strategy based FWI method, an enhanced Full Waveform Inversion is proposed for the structural analysis of dams.

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Metadaten
Document Type:Doctoral Thesis
Author: Muyiwa AlaladeORCiD
DOI (Cite-Link):https://doi.org/10.25643/bauhaus-universitaet.3956Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20190813-39566Cite-Link
Series (Serial Number):ISM-Bericht // Institut für Strukturmechanik, Bauhaus-Universität Weimar (2019,1)
Referee:Professor Carsten KönkeGND, Professor Frank WuttkeGND
Advisor:Professor Tom LahmerORCiDGND
Language:English
Date of Publication (online):2019/08/13
Year of first Publication:2019
Date of final exam:2019/06/03
Release Date:2019/08/13
Publishing Institution:Bauhaus-Universität Weimar
Granting Institution:Bauhaus-Universität Weimar, Fakultät Bauingenieurwesen
Institutes:Fakultät Bauingenieurwesen / Institut für Strukturmechanik
Tag:Damage identification; Dams; Full waveform inversion; Inverse analysis; Wave propagation
GND Keyword:Talsperre; Staumauer
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften / 627 Wasserbau
BKL-Classification:56 Bauwesen / 56.30 Wasserbau
56 Bauwesen / 56.59 Bauingenieurwesen, Bautechnik: Sonstiges
Licence (German):License Logo Creative Commons 4.0 - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen (CC BY-NC-SA 4.0)