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Title: Soil-object interaction modelling for fishing gears simulation and analysis
Author: Esmaeili, Moosa
ISNI:       0000 0004 8498 4544
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2019
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One of the important factors that play a fundamental role in designing the fishing tools, such as bottom fishing gears, is the behavioural analysis of this type of gear in contact with seabed. Proper and accurate analysis of the interaction between bottom fishing gear elements and seabed can help engineers to design better and optimal elements. Parts that are in contact with seabed are analysed in this research include: rockhopper, roller clump, otter door and rope. Due to the variety of tools and many capabilities that exist in numerical methods, the finite element method has been selected for the analysis in this study. However, since the analysis of boundary value problems associated with large deformations suffering from several mesh distortions which is often difficult to solve with traditional Lagrangian finite element methods. Therefore, the Coupled Eulerian – Lagrangian (CEL) method has been developed for analysis in this study. It was shown analyse of large deformation problems has been simulated using the CEL method accurately. The validation of this analysis was performed using laboratory experiments undertaken on a 1:5 scaled model and sea trial in full scale. Finally, an analytical model is also presented, which predicts the drag and vertical forces acting on the rigid object, towed in noncohesive material. Analytical results were compared with the experimental results available in the literature and those obtained from scaled models undertaken as part of this study and they are in good agreement.
Supervisor: Ivanović, Ana Sponsor: Sponsored by: Marine Scotland ; Research Council of Norway via SINTEF
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Fisheries ; Ocean bottom