Continuous structural monitoring of oil rig sub-sea structures for flood member detection using axisymmetric guided waves

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


An axisymmetric guided wave system for detecting flooding in the hollow sub-sea structures of offshore steel oil-rigs is presented. A sensor, attached to a sub-sea structure and powered by seawater, transmits chirp-encoded signals to a monitoring real-time digital signal processing system at surface level. Experiments performed using a jointed steel pipe structure, 7 m × 0.5 m × 16 mm, completely immersed in seawater showed optimal performance at 38 kHz contrasted to 21 kHz, corroborating values predicted by disperse theoretical model.

Bibliographical metadata

Original languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation: Volume 25B
Number of pages8
Volume820 II
Publication statusPublished - 6 Mar 2006
EventReview of Progress in Quantitative Nondestructive - Brunswick, ME, United States
Event duration: 31 Jul 20055 Aug 2005


ConferenceReview of Progress in Quantitative Nondestructive
CountryUnited States
CityBrunswick, ME