Corrosion-fatigue damage identification in submerged mooring chain links using remote acoustic emission monitoring

Filippo Riccioli*, Øystein Gabrielsen, Ingrid Skutle Høgsæt, Pedro Silva Barros, Lotfollah Pahlavan

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

This paper investigates the feasibility of detection, localisation, and monitoring of corrosion-fatigue damage in mooring chain links using remote Acoustic Emission (AE) technique in submerged conditions. A large-scale experiment was conducted on a studless R4 chain retrieved after about two decades of operation offshore. Ultrasound signals were continuously measured using fixed and movable arrays of AE transducers placed on perpendicular planes in the water tank enclosing the chain. The AE parameters extracted from the measured signals have been analysed. AE sources were successfully localised on the 3D geometry of the chain links. The results suggest that damage growth can be detected and localised using non-contact underwater AE transducers.

Original languageEnglish
Article number103685
Number of pages13
JournalMarine Structures
Volume98
DOIs
Publication statusPublished - 2024

Keywords

  • Acoustic emission
  • Corrosion-fatigue
  • Damage localisation
  • Mooring chain
  • Structural health monitoring

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