GUIDED WAVES IN SHIP STRUCTURAL HEALTH MONITORING – A FEASIBILITY STUDY

Emil Roch; Beata Zima; Krzysztof Wołoszyk; Yordan Garbatov

doi:10.2478/pomr-2023-0023

GUIDED WAVES IN SHIP STRUCTURAL HEALTH MONITORING – A FEASIBILITY STUDY

Abstract

Ships and offshore structures operate in a severe corrosion degradation environment and face difficulty in providing long- lasting corrosion protection. The Classification Societies recommend regular thickness measurements leading to structural component replacements, to ensure structural integrity during service life. The measurements are usually performed using ultrasonic thickness gauges and such an approach requires multiple measurements of the corroded structural components. Otherwise, the collected data are insufficient to precisely assess the corrosion degradation level. This study aims to perform numerical and experimental analyses to verify the use of guided ultrasonic waves in defining the corrosion degradation level of the corroded structural components of a ship. The study incorporates the fundamental antisymmetric Lamb mode, excited by piezoelectric transducers attached at the pre-selected points on stiffened panels, representing typical structural ship components. The specimens are exposed to accelerated marine corrosion degradation, the influence of the degree of degradation on the wave time of flight being analysed. The study indicates that guided waves are a promising approach for diagnosing corroded structural components. The signals characterised by a high signal-to-noise ratio have been captured, even for relatively long distances between the transducers. This proves that the proposed approach can be suitable for monitoring more extensive areas of ship structures by employing a single measurement

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DOI:: Digital Object Identifier (open in new tab) 10.2478/pomr-2023-0023
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Keywords

CORROSION, GUIDED WAVES, NON-DESTRUCTIVE TESTING, SHIP STRUCTURES

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

Polish Maritime Research no. 30, pages 76 - 84,
ISSN: 1233-2585

Language:

English

Publication year:

2023

Bibliographic description:

Roch E., Zima B., Wołoszyk K., Garbatov Y.: GUIDED WAVES IN SHIP STRUCTURAL HEALTH MONITORING – A FEASIBILITY STUDY// Polish Maritime Research -Vol. 30,iss. 2 (2023), s.76-84

DOI: