As part of the effort to advance offshore aquaculture, various mechanisms are being explored. This study focuses on the structural analysis of the SeaFisher, a proposed structure for aquaculture in Australia. The SeaFisher utilizes high-density polyethylene (HDPE) and glass fiber reinforced polymer (GFRP), both lightweight materials. The suitability of these structural materials and elements for the SeaFisher is still under scrutiny, particularly regarding their performance at the proposed site.

This study aims to conduct a detailed analysis of the SeaFisher’s structural components, including HDPE pipes, HDPE connectors, and GFRP diagrids. Additionally, a study on the creep behavior of HDPE will be conducted to understand its long-term performance. These analyses will be carried out through experimental study and finite element analysis. Furthermore, mechanical and hydrodynamic tests will be performed on the kikkonet proposed for the SeaFisher to understand its behavior under static and cyclic loading, as well as the drag forces acting on it when immersed in water.

The outcome of this study will significantly contribute to the development of the SeaFisher and other HDPE offshore structures in the future. This project aligns with the Blue Economy CRC Research program, focusing on the design of novel stand-alone and integrated aquaculture and renewable energy infrastructure for environmental and economic benefits. The PhD project will contribute to the RP1.1.3 milestone by delivering a report on the selection of appropriate materials and analysis methods based on optimized simulations and analysis for new or improved fish cage designs. It will also meet the RP1.1.4 milestone by summarizing experiments on new cage designs and refining those designs.