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Title: | Numerical modelling of ultrasonic guided wave propagation and defect detection in offshore steel sheet piles |
Authors: | Dhutti, A Dhutti, A Malo, S Marques, H Balachandran, W Gan, TH |
Keywords: | sheet pile;ultrasonic guided waves;numerical modelling;array design;defect detection;non-destructive testing;inspection |
Issue Date: | 29-Apr-2021 |
Publisher: | MDPI |
Citation: | Dhutti, Anuj, Dhutti, Anurag, Malo, S., Marques, H., Balachandran, W. and Gan, T.-H. (2021) ‘Numerical Modelling of Ultrasonic Guided Wave Propagation and Defect Detection in Offshore Steel Sheet Piles’, Applied Sciences (Switzerland), 11(9), 4076, pp. 1-xx. doi: 10.3390/app11094076. |
Abstract: | Copyright: © 2021 by the authors. Sheet piles are significantly more prone to advanced corrosion rates due to accelerated low water corrosion. Current inspection and assessment techniques are costly, time-consuming and labour-intensive. Guided wave testing (GWT) has gained increased attention due to its capability of screening long distances; however, it has not been used previously to inspect the active zone in steel sheet piles. This paper focuses on the numerical modelling of wave propagation and defect detection in U-shaped piles to demonstrate the capabilities of GWT for the inspection of non-accessible areas of steel sheet piles. Two shear transducer arrays were designed, bearing high SH0 mode purity and directionality. A wave propagation comparison study concluded that the back wall reflection signal from the web of a U-pile was 11.5% higher than the respective signal from the plate, and the excitation signal in the flange, at 5.65 m and 7.12 m, was respectively 35% and 46% less than the excitation signal in the web at the same distance. Defect reflection, measured from five representative defect scenarios, ranged from 7.5 to 47% of the signal amplitude in the web of the pile and 5 to 32.5% in the flange of the pile. |
URI: | https://bura.brunel.ac.uk/handle/2438/23154 |
DOI: | https://doi.org/10.3390/app11094076 |
Other Identifiers: | 4076 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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