Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains
In-service mooring chains are subjected to harsh environmental conditions on a daily basis, which increases the necessity of integrity assessment of chain links. Periodic structural health monitoring of mooring chains is mandatory and vital in order to maintain the safety of floating platforms. Appl...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8543782/ |
| _version_ | 1819179513624395776 |
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| author | Mahesh Dissanayake David Carswell Michael Corsar Tariq Pervez Sattar Mark Sutcliffe Premesh Shehan Lowe Tat-Hean Gan |
| author_facet | Mahesh Dissanayake David Carswell Michael Corsar Tariq Pervez Sattar Mark Sutcliffe Premesh Shehan Lowe Tat-Hean Gan |
| author_sort | Mahesh Dissanayake |
| collection | DOAJ |
| description | In-service mooring chains are subjected to harsh environmental conditions on a daily basis, which increases the necessity of integrity assessment of chain links. Periodic structural health monitoring of mooring chains is mandatory and vital in order to maintain the safety of floating platforms. Application of ultrasound for in-service mooring chain inspection is still in its infancy due to the lack of accessibility, in-field operational complexity, and the geometrical features of mooring systems. With the advancement of robotic/automated systems (i.e., chain climbing robotic mechanisms), interest in in situ ultrasound inspection has increased. At present, ultrasound inspection has been confined to the weld area of the chain links. However, according to recent studies on fatigue and residual stresses, ultrasound inspection of the chain crown should be further investigated. A new application of ultrasonic phased array full matrix capture is discussed in this paper for investigation of the chain crown. Due to the complex geometry (i.e., curved and limited access) of the chain crown, a surface mapping technique has been added to the presented full matrix capture technique. The inspection method presented in this paper is suitable for chain links both in air and underwater. A continuous water supply wedge was developed in order to supply couplant for inair inspection. Development of a technique that can be adapted for robotic inspection was considered, and an automated manipulator was used to carry out inspections. The design of the inspection method and the robotic manipulator is discussed in this paper. The technique is validated with laboratory experiments. |
| first_indexed | 2024-12-22T21:59:39Z |
| format | Article |
| id | doaj.art-44604d1dfbc643eeac8827b1a7b82e4e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-22T21:59:39Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-44604d1dfbc643eeac8827b1a7b82e4e2022-12-21T18:11:09ZengIEEEIEEE Access2169-35362018-01-016755607557110.1109/ACCESS.2018.28833788543782Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring ChainsMahesh Dissanayake0https://orcid.org/0000-0001-6666-6348David Carswell1Michael Corsar2Tariq Pervez Sattar3Mark Sutcliffe4Premesh Shehan Lowe5Tat-Hean Gan6School of Engineering, London South Bank University, London, U.K.TWI Ltd., Cambridge, U.K.London South Bank Innovation Centre, Cambridge, U.K.London South Bank Innovation Centre, Cambridge, U.K.TWI Ltd., Cambridge, U.K.TWI Ltd., Cambridge, U.K.TWI Ltd., Cambridge, U.K.In-service mooring chains are subjected to harsh environmental conditions on a daily basis, which increases the necessity of integrity assessment of chain links. Periodic structural health monitoring of mooring chains is mandatory and vital in order to maintain the safety of floating platforms. Application of ultrasound for in-service mooring chain inspection is still in its infancy due to the lack of accessibility, in-field operational complexity, and the geometrical features of mooring systems. With the advancement of robotic/automated systems (i.e., chain climbing robotic mechanisms), interest in in situ ultrasound inspection has increased. At present, ultrasound inspection has been confined to the weld area of the chain links. However, according to recent studies on fatigue and residual stresses, ultrasound inspection of the chain crown should be further investigated. A new application of ultrasonic phased array full matrix capture is discussed in this paper for investigation of the chain crown. Due to the complex geometry (i.e., curved and limited access) of the chain crown, a surface mapping technique has been added to the presented full matrix capture technique. The inspection method presented in this paper is suitable for chain links both in air and underwater. A continuous water supply wedge was developed in order to supply couplant for inair inspection. Development of a technique that can be adapted for robotic inspection was considered, and an automated manipulator was used to carry out inspections. The design of the inspection method and the robotic manipulator is discussed in this paper. The technique is validated with laboratory experiments.https://ieeexplore.ieee.org/document/8543782/Mooring chain inspectionFMC algorithmrobotic inspectionmooring chainstructural health monitoringmooring NDT (non-destructive testing) |
| spellingShingle | Mahesh Dissanayake David Carswell Michael Corsar Tariq Pervez Sattar Mark Sutcliffe Premesh Shehan Lowe Tat-Hean Gan Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains IEEE Access Mooring chain inspection FMC algorithm robotic inspection mooring chain structural health monitoring mooring NDT (non-destructive testing) |
| title | Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains |
| title_full | Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains |
| title_fullStr | Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains |
| title_full_unstemmed | Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains |
| title_short | Automated Application of Full Matrix Capture to Assess the Structural Integrity of Mooring Chains |
| title_sort | automated application of full matrix capture to assess the structural integrity of mooring chains |
| topic | Mooring chain inspection FMC algorithm robotic inspection mooring chain structural health monitoring mooring NDT (non-destructive testing) |
| url | https://ieeexplore.ieee.org/document/8543782/ |
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