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On the Probability of Localizing Damages Based on Mode Shape Changes

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  • Alexander Mendler, University of Hamburg
  • ,
  • Szymon Greś
  • Michael Döhler, Université Gustave Eiffel
  • ,
  • Sylvia Keßler, University of Hamburg

Obtaining reliable diagnosis results based on modal parameter changes is a challenge due to their low sensitivity to local damages and uncertainties related to their estimation, especially under ambient excitation. In non-destructive testing, the reliability is quantified through probability of detection (POD) curves, which are often limited to damage detection and cannot be applied to structural health monitoring applications where no data from the damaged state is available. To fill this gap, a method is developed in this paper that allows one to create probability of localization curves (POL curves) based on measurements from undamaged structures. The approach is based on statistical damage localization tests and requires a finite element model. For proof of concept, the method is applied to a simple numerical structure, demonstrating that it is a powerful tool to analyze the performance of SHM systems before damage occurs. The findings demonstrate that the POL increases with an increasing number of observed modes of vibration, an increasing measurement duration, an appropriate sensor layout, and low measurement noise levels.

Original languageEnglish
Book series Lecture Notes in Civil Engineering
Pages (from-to)233-243
Number of pages11
Publication statusPublished - 2023
Event10th European Workshop on Structural Health Monitoring, EWSHM 2022 - Palermo, Italy
Duration: 4 Jul 20227 Jul 2022


Conference10th European Workshop on Structural Health Monitoring, EWSHM 2022

Bibliographical note

Funding Information:
Acknowledgements. This research study is funded by dtec.bw - Digitalization and Technology Research Center of the Bundeswehr.

Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

    Research areas

  • Ambient vibrations, Fisher info, Modal parameters, POD curves

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