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Hydrodynamic Characteristics of ROVs During Deployment Through Wave-Affected Zones

[+] Author Affiliations
Musa B. Bashir, Simon D. Benson, Alan J. Murphy

Newcastle University, Newcastle Upon Tyne, UK

Mahesh Menon, Rob Eastwood, Daniel Cunny, Michael van Zwanenberg

Soil Machine Dynamics Ltd, Newcastle Upon Tyne, UK

Paper No. OMAE2015-41940, pp. V001T01A051; 10 pages
doi:10.1115/OMAE2015-41940
From:
  • ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology; Offshore Geotechnics
  • St. John’s, Newfoundland, Canada, May 31–June 5, 2015
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5647-5
  • Copyright © 2015 by ASME

abstract

The prediction of wave-induced loads on Remotely Operated Vehicles (ROVs) during deployment through the splash zone is an important requirement to the design of a launch and recovery system. This paper presents the results of numerical and experimental hydrodynamic analysis of the motion response and wave-induced loads on a subsea trencher ROV during its deployment through the splash zone. The main focus of the study is to determine the maximum wave-induced loads and also to establish the maximum range of sea conditions in which the ROV can be operated safely. The numerical measurement of the hydrodynamic responses is completed using a 3D potential theory–based solver. The results obtained are compared with the predicted experimental responses measured using a 1/12 scale model of the ROV in a wave tank. A further comparison of the numerical responses with a box-shaped model of approximately similar overall dimensions to the ROV is performed in order to establish the validity of using a simplified shape to represent the actual ROV in various modelling scenarios. The result of this comparison shows that using a box-shaped model grossly over-predicts the responses and can lead to overly conservative load prediction.

Copyright © 2015 by ASME
Topics: Waves

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