The Problem
Jee developed a scale model of the protection structure and designed a test procedure based on the client's fishing gear interaction studies.
Preliminary testing identified a minor snagging feature, which Jee addressed through an initial design modification before progressing to flume tank trials.
The modified structure was then subjected to scale model testing, with different types of trawl gear and nets passed over it. Three cameras positioned around the flume tank captured the interactions from different angles, while loads in the warp lines were recorded to support the analysis.
The trials identified unacceptable behaviour with one particular type of net. By reviewing the video footage, Jee's engineers pinpointed the exact snag locations and modified the affected areas of the structure. Further testing was then undertaken to verify the revised design.
Conclusion
Following the design modifications and successful repeat testing, the protection structure was deemed overtrawlable and met the requirements of NORSOK U-001.
The scale model trials provided the client with clear visual and analytical evidence of the structure's interaction with fishing gear, allowing snagging issues to be identified and resolved efficiently.
Jee also liaised directly with the verification agency, which attended the trials, providing additional confidence in the testing process and the resulting design.
Through a flexible and responsive approach, Jee progressed the testing and design modifications efficiently, helping the client meet a time-critical project schedule while achieving the required technical outcome.
For more information or to download our Design capability statement, visit www.jee.co.uk/design.
To contact our Head of Design, John French, email John.French@jee.co.uk , or call +44 (0)1732 371 371.
Jee Ltd
