Abstract
The goal of this paper is to provide a comparative analysis of two commonly used approaches to discretize offshore fish cages: the lumped-mass approach and the finite element technique. Two case studies are chosen to compare predictions of the LMA (lumped-mass approach) and FEA (finite element analysis) based numerical modeling techniques. In both case studies, we consider several loading conditions consisting of different uniform currents and monochromatic waves. We investigate motion of the cage, its deformation, and the resultant tension in the mooring lines. Both model predictions are sufficient close to the experimental data, but for the first experiment, the DUT-FlexSim predictions are slightly more accurate than the ones provided by Aqua-FE™. According to the comparisons, both models can be successfully utilized to the design and analysis of the offshore fish cages provided that an appropriate safety factor is chosen.
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This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51239002 and 51221961), and Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province (Grant No. 2014008).
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Zhao, Yp., Wang, Xx., Decew, J. et al. Comparative study of two approaches to model the offshore fish cages. China Ocean Eng 29, 459–472 (2015). https://doi.org/10.1007/s13344-015-0032-0
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DOI: https://doi.org/10.1007/s13344-015-0032-0